|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

ENGINES OR PUMPS

|  | F01 - F42 |
Note(s) Guide to the use of this subsection (classes Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F04) The following notes are meant to assist in the use of this part of the classification scheme. In this subsection, subclasses or groups designating "engines" or "pumps" cover methods of operating the same, unless otherwise specifically provided for. In this subsection, the following terms or expressions are used with the meanings indicated: "engine" means a device for continuously converting fluid energy into mechanical power. Thus, this term includes, for example, steam piston engines or steam turbines, per se, or internal-combustion piston engines, but it excludes single-stroke devices. "Engine" also includes the fluid-motive portion of a meter unless such portion is particularly adapted for use in a meter; "pump" means a device for continuously raising, forcing, compressing, or exhausting fluid by mechanical or other means. Thus, this term includes fans or blowers; "machine" means a device which could equally be an engine and a pump, and not a device which is restricted to an engine or one which is restricted to a pump; "positive displacement" means the way the energy of a working fluid is transformed into mechanical energy, in which variations of volume created by the working fluid in a working chamber produce equivalent displacements of the mechanical member transmitting the energy, the dynamic effect of the fluid being of minor importance, and vice versa; "non-positive displacement" means the way the energy of a working fluid is transformed into mechanical energy, by transformation of the energy of the working fluid into kinetic energy, and vice versa; "oscillating-piston machine" means a positive-displacement machine in which a fluid-engaging work-transmitting member oscillates. This definition applies also to engines and pumps; "rotary-piston machine" means a positive-displacement machine in which a fluid-engaging work-transmitting member rotates about a fixed axis or about an axis moving along a circular or similar orbit. This definition applies also to engines and pumps; "rotary piston" means the work-transmitting member of a rotary-piston machine and may be of any suitable form, e.g., like a toothed gear; "cooperating members" means the "oscillating piston" or "rotary piston" and another member, e.g., the working-chamber wall, which assists in the driving or pumping action; "movement of the co-operating members" is to be interpreted as relative, so that one of the "co-operating members" may be stationary, even though reference may be made to its rotational axis, or both may move; "teeth or tooth equivalents" include lobes, projections or abutments; "internal-axis type" means that the rotational axes of the inner and outer co-operating members remain at all times within the outer member, e.g., in a similar manner to that of a pinion meshing with the internal teeth of a ring gear; "free piston" means a piston of which the length of stroke is not defined by any member driven thereby; "cylinders" means positive-displacement working chambers in general. Thus, this term is not restricted to cylinders of circular cross-section; "main shaft" means the shaft which converts reciprocating piston motion into rotary motion or vice versa; "plant" means an engine together with such additional apparatus as is necessary to run the engine. For example, a steam engine plant includes a steam engine and means for generating the steam; "working fluid" means the driven fluid in a pump and the driving fluid in an engine. The working fluid may be in a gaseous state, i.e., compressible, or liquid. In the former case coexistence of two states is possible; "steam" includes condensable vapours in general, and "special vapour" is used when steam is excluded; "reaction type" as applied to non-positive-displacement machines or engines means machines or engines in which pressure/velocity transformation takes place wholly or partly in the rotor. Mmachines or engines with no, or only slight, pressure/velocity transformation in the rotor are called "impulse type". In this subsection: cyclically operating valves, lubricating, gas-flow silencers or exhaust apparatus, or cooling are classified in subclasses Fulltext... Hierarchy... Expanded...F01L, Fulltext... Hierarchy... Expanded...F01M, Fulltext... Hierarchy... Expanded...F01N, Fulltext... Hierarchy... Expanded...F01P irrespective of their stated application, unless their classifying features are peculiar to their application, in which case they are classified only in the relevant subclass of classes Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F01-F04; lubricating, gas-flow silencers or exhaust apparatus, or cooling of machines or engines are classified in subclasses Fulltext... Hierarchy... Expanded...F01M, Fulltext... Hierarchy... Expanded...F01N, Fulltext... Hierarchy... Expanded...F01P except for those peculiar to steam engines which are classified in subclass Fulltext... Hierarchy... Expanded...F01B. For use of this subsection with a good understanding, it is essential to remember, so far as subclasses Fulltext... Hierarchy... Expanded...F01B, Fulltext... Hierarchy... Expanded...F01C, Fulltext... Hierarchy... Expanded...F01D, Fulltext... Hierarchy... Expanded...F03B, and Fulltext... Hierarchy... Expanded...F04B, Fulltext... Hierarchy... Expanded...F04C, Fulltext... Hierarchy... Expanded...F04D, which form its skeleton, are concerned: the principle which resides in their elaboration, the classifying characteristics which they call for, and their complementarity. Principle This concerns essentially the subclasses listed above. Other subclasses, notably those of class Fulltext... Hierarchy... Expanded...F02, which cover better-defined matter, are not considered here. Each subclass covers fundamentally a genus of apparatus (engine or pump) and by extension covers equally "machines" of the same kind. Two different subjects, one having a more general character than the other, are thus covered by the same subclass. Subclasses Fulltext... Hierarchy... Expanded...F01B, Fulltext... Hierarchy... Expanded...F03B, Fulltext... Hierarchy... Expanded...F04B, beyond the two subjects which they cover, have further a character of generality in relation to other subclasses concerning the different species of apparatus in the genus concerned. This generality applies as well for the two subjects dealt with, without these always being in relation to the same subclasses. Thus, subclass Fulltext... Hierarchy... Expanded...F03B, in its part dealing with "machines", should be considered as being the general class relating to subclasses Fulltext... Hierarchy... Expanded...F04B, Fulltext... Hierarchy... Expanded...F04C, and in its part dealing with "engines" as being general in relation to subclass Fulltext... Hierarchy... Expanded...F03C. Characteristics The principal classifying characteristic of the subclass is that of genera of apparatus, of which there are three possible: Machines; engines; pumps. As stated above, "machines" are always associated with one of the other two genera. These main genera are subdivided according to the general principles of operation of the apparatus: Positive displacement; non-positive displacement. The positive displacement apparatus are further subdivided according to the ways of putting into effect the principle of operation, that is, to the kind of apparatus: Simple reciprocating piston; rotary or oscillating piston; other kind. Another classifying characteristic is that of the working fluid, in respect of which three kinds of apparatus are possible, namely: Liquid and elastic fluid; elastic fluid; liquid. Complementarity This resides in association of pairs of the subclasses listed above, according to the characteristics under consideration in respect of kind of apparatus or working fluid. The subclasses concerned with the various principles, characteristics and complementarity are shown in the following table: It is seen from this table that: For the same kind of apparatus in a given genus, the characteristic of "working fluid" associates: Fulltext... Hierarchy... Expanded...F01B and Fulltext... Hierarchy... Expanded...F04B Fulltext... Hierarchy... Expanded...F01C and Fulltext... Hierarchy... Expanded...F04C Machines Fulltext... Hierarchy... Expanded...F01D and Fulltext... Hierarchy... Expanded...F03B Fulltext... Hierarchy... Expanded...F01B and Fulltext... Hierarchy... Expanded...F03C Fulltext... Hierarchy... Expanded...F01C and Fulltext... Hierarchy... Expanded...F03C Engines Fulltext... Hierarchy... Expanded...F01D and Fulltext... Hierarchy... Expanded...F03B For the same kind of working fluid, the "apparatus" characteristic relates subclasses in the same way as considerations of relative generality.

|  | F02 |
COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines Fulltext... Hierarchy... Expanded...F01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

|  | F02M |
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF (charging such engines Fulltext... Hierarchy... Expanded...F02B)

|  | F02M |
Note(s) In this subclass, the following terms or expressions are used with the meanings indicated: "carburettors" means essentially apparatus for mixing fuel with air, the fuel being brought into mixing contact with the air by lowering the air pressure, e.g. in a venturi; "fuel-injection apparatus" means apparatus for introducing fuel into a space, e.g. engine cylinder, by pressurising the fuel, e.g. by a pump acting behind the fuel, and thus includes the so-called "solid-fuel injection" in which liquid fuel is introduced without any admixture of gas; "low-pressure fuel injection" means fuel injection in which the fuel-air mixture containing fuel thus injected will be substantially compressed in the compression stroke of the engine; "pumping element" means a single piston-cylinder unit in a reciprocating-piston fuel-injection pump or the equivalent unit in any other type of fuel-injection pump. Attention is drawn to the Notes preceding class Fulltext... Hierarchy... Expanded...F01.

|  | F02M |
Subclass index
SUPPLYING WITH LIQUID FUEL |
Carburettors |
starting, idling; float-controlled fuel level; mixture control; throttling, mixing chambers | 1/00, 3/00; 5/00; 7/00; 9/00
heating, cooling, insulating | 15/00
multi-stage, register type; combinations of carburettors or fuels; combination with low-pressure injection | 11/00; 13/00; 71/00
other characteristics; other details, or accessories | 17/00; 19/00
Injection apparatus |
general characteristics, injection without gas |
with two or more sequentially-fed injectors; with two or more liquids | 41/00; 43/00
with cyclic delivery characteristics; with fluid-actuated valves | 45/00; 47/00
with pump or injector actuated by cylinder pressure or by the piston | 49/00
electrically-operated | 51/00
with heating, cooling, or insulating means; characterised by fuel pipes or venting means | 53/00; 55/00
injectors combined with other devices | 57/00
arrangements of apparatus relative to engine, related pump drives | 39/00
other adaptations of pumps; other injectors | 59/00; 61/00
other apparatus, details, or accessories | 63/00, 69/00
testing | 65/00
using high-pressure gas | 67/00
low-pressure apparatus | 51/02, 69/00, 71/00
SUPPLYING WITH NON-LIQUID FUEL | 21/00
FEEDING OR PRETREATING AIR, FUEL, OR FUEL-AIR MIXTURE |
Pre-treating fuel, air, or mixture |
adding secondary air; adding non-fuel substances or secondary fuel | 23/00; 25/00
by catalytic, electrical, or magnetic means, or by sound or radiation; thermally | 27/00; 31/00
by re-atomising or homogenising; air cleaning; other treatment | 29/00; 35/00; 33/00
Air intakes or silencers, induction systems | 35/00
Fuel transfer to carburettors or injection apparatus | 37/00

|  | F02M 1/00 - F02M 19/00 |
Carburettors (for gaseous fuels Fulltext... Hierarchy... Expanded...F02M 21/00; combined with low-pressure fuel-injection apparatus Fulltext... Hierarchy... Expanded...F02M 71/00)

|  | F02M 1/00 |
Carburettors with means for facilitating engine's starting or its idling below operational temperatures

|  | F02M 1/02 |
· | the means to facilitate starting or idling being chokes for enriching fuel-air mixture (automatic chokes Fulltext... Hierarchy... Expanded...F02M 1/08)

|  | F02M 1/04 |
· | the means to facilitate starting or idling being auxiliary carburetting apparatus able to be put into, and out of, operation, e.g. having automatically-operated disc valves

|  | F02M 1/06 |
· · | having axially-movable valves, e.g. piston-shaped

|  | F02M 1/08 |
· | the means to facilitate starting or idling becoming operative or inoperative automatically (in connection with auxiliary carburetting apparatus Fulltext... Hierarchy... Expanded...F02M 1/04)

|  | F02M 1/10 |
· · | dependent on engine temperature, e.g. having thermostat

|  | F02M 1/12 |
· · · | with means for electrically heating thermostat

|  | F02M 1/14 |
· · | dependent on pressure in combustion-air- or fuel-air-mixture intake (Fulltext... Hierarchy... Expanded...F02M 1/10 takes precedence)

|  | F02M 1/16 |
· | Other means for enriching fuel-air mixture during starting; Priming cups; using different fuels for starting and normal operation

|  | F02M 1/18 |
· · | Enriching fuel-air mixture by depressing float to flood carburettor

|  | F02M 3/00 |
Idling devices (with means for facilitating idling below operational temperatures Fulltext... Hierarchy... Expanded...F02M 1/00)

|  | F02M 3/02 |
· | Preventing flow of idling fuel

|  | F02M 3/04 |
· · | under conditions where engine is driven instead of driving, e.g. driven by vehicle running down hill

|  | F02M 3/045 |
· · · | Control of valves situated in the idling nozzle system, or the passage system, by electrical means or by a combination of electrical means with fluidic or mechanical means [4]

|  | F02M 3/05 |
· · · | Pneumatic or mechanical control, e.g. with speed regulation [4]

|  | F02M 3/055 |
· · · | Fuel flow cut-off by introducing air, e.g. brake air, into the idling fuel system [4]

|  | F02M 3/06 |
· | Increasing idling speed

|  | F02M 3/07 |
· · | by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatical means, according to engine speed [4]

|  | F02M 3/08 |
· | Other details of idling devices (fighting ice-formation by heating idling ports Fulltext... Hierarchy... Expanded...F02M 15/02)

|  | F02M 3/09 |
· · | Valves responsive to engine conditions, e.g. manifold vacuum (Fulltext... Hierarchy... Expanded...F02M 1/00, Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02M 5/00-F02M 33/00 take precedence) [5]

|  | F02M 3/10 |
· · | Fuel metering pins; Nozzles [4]

|  | F02M 3/12 |
· · | Passage way systems [4]

|  | F02M 3/14 |
· · | Location of idling system outlet relative to throttle valve [4]

|  | F02M 5/00 |
Float-controlled apparatus for maintaining a constant fuel level

|  | F02M 5/02 |
· | with provisions to meet variations in carburettor position, e.g. upside-down position in aircraft

|  | F02M 5/04 |
· · | with pivotally or rotatably mounted float chambers [4]

|  | F02M 5/06 |
· | having adjustable float mechanism, e.g. to meet dissimilarities in specific gravity of different fuels

|  | F02M 5/08 |
· | having means for venting float chambers

|  | F02M 5/10 |
· | having means for preventing vapour lock, e.g. insulated float chambers or forced fuel circulation through float chamber with engine stopped

|  | F02M 5/12 |
· | Other details, e.g. floats, valves, setting devices or tools (floats in general Fulltext... Hierarchy... Expanded...F16K 33/00)

|  | F02M 5/16 |
· · | Floats [4]

|  | F02M 7/00 |
Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions (choke valves for starting Fulltext... Hierarchy... Expanded...F02M 1/00)

|  | F02M 7/02 |
· | Carburettors having aerated fuel spray nozzles (with valve control for amount of air for aerating fuel Fulltext... Hierarchy... Expanded...F02M 7/24)

|  | F02M 7/04 |
· | Means for enriching charge at high combustion-air flow

|  | F02M 7/06 |
· | Means for enriching charge on sudden throttle opening, i.e. at acceleration, e.g. storage means in passage way system

|  | F02M 7/08 |
· · | using pumps

|  | F02M 7/087 |
· · · | changing output according to temperature in engine [4]

|  | F02M 7/093 |
· · · | changing output according to intake vacuum [4]

|  | F02M 7/10 |
· | Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means (Fulltext... Hierarchy... Expanded...F02M 7/23 takes precedence) [4]

|  | F02M 7/11 |
· · | Altering float-chamber pressure (enriching the fuel-air mixture during starting by depressing float to flood carburettor Fulltext... Hierarchy... Expanded...F02M 1/18) [5]

|  | F02M 7/12 |
· | Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves (Fulltext... Hierarchy... Expanded...F02M 7/24 takes precedence) [4]

|  | F02M 7/127 |
· · | Altering the float-chamber pressure (enriching the fuel-air mixture during starting by depressing float to flood carburettor Fulltext... Hierarchy... Expanded...F02M 1/18) [5]

|  | F02M 7/133 |
· · | Auxiliary jets, i.e. operating only under certain conditions, e.g. full power (Fulltext... Hierarchy... Expanded...F02M 7/04, Fulltext... Hierarchy... Expanded...F02M 7/06 take precedence) [5]

|  | F02M 7/14 |
· · | with means for controlling cross-sectional area of fuel spray nozzle (dependent on air-throttle valve position Fulltext... Hierarchy... Expanded...F02M 7/22)

|  | F02M 7/16 |
· · · | operated automatically, e.g. dependent on exhaust-gas analysis

|  | F02M 7/17 |
· · · · | by a pneumatically adjustable piston-like element, e.g. constant depression carburettors [5]

|  | F02M 7/18 |
· · | with means for controlling cross-sectional area of fuel-metering orifice (dependent on air-throttle position Fulltext... Hierarchy... Expanded...F02M 7/22)

|  | F02M 7/20 |
· · · | operated automatically, e.g. dependent on altitude

|  | F02M 7/22 |
· · | fuel flow cross-sectional area being controlled dependent on air-throttle-valve position (the throttle valve being slidably arranged transversely to air passage Fulltext... Hierarchy... Expanded...F02M 9/06)

|  | F02M 7/23 |
· | Fuel aerating devices [4]

|  | F02M 7/24 |
· · | Controlling flow of aerating air [4]

|  | F02M 7/26 |
· · · | dependent on position of optionally operable throttle means [4]

|  | F02M 7/28 |
· · · | dependent on temperature or pressure [4]

|  | F02M 9/00 |
Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type (register-type carburettors Fulltext... Hierarchy... Expanded...F02M 11/00); Carburettors having fuel-air mixing chambers of variable shape or position

|  | F02M 9/02 |
· | having throttling valves, e.g. of piston shape, slidably arranged transversely to the passage

|  | F02M 9/04 |
· · | with throttling valves sliding in a plane inclined to the passage

|  | F02M 9/06 |
· · | with means for varying cross-sectional area of fuel spray nozzle dependent on throttle position (Fulltext... Hierarchy... Expanded...F02M 7/17 takes precedence) [5]

|  | F02M 9/08 |
· | having throttling valves rotatably mounted in the passage

|  | F02M 9/10 |
· | having valves, or like controls, of elastic-wall type for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers

|  | F02M 9/12 |
· | having other specific means for controlling the passage, or for varying cross-sectional area, of fuel-air mixing chambers

|  | F02M 9/127 |
· · | Axially movable throttle valves concentric with the axis of the mixture passage [5]

|  | F02M 9/133 |
· · · | the throttle valves having mushroom-shaped bodies [5]

|  | F02M 9/14 |
· | having venturi and nozzle relatively displaceable essentially along the venturi axis

|  | F02M 11/00 |
Multi-stage carburettors; Register-type carburettors, i.e. with slidable or rotatable throttling valves in which a plurality of fuel nozzles, other than only an idling nozzle and a main one, are sequentially exposed to air stream by throttling valve

|  | F02M 11/02 |
· | with throttling valve, e.g. of flap or butterfly type, in a later stage opening automatically

|  | F02M 11/04 |
· · | the later-stage valves having damping means

|  | F02M 11/06 |
· | Other carburettors with throttling valve of flap or butterfly type

|  | F02M 11/08 |
· | Register carburettors with throttling valve movable transversally to air passage

|  | F02M 11/10 |
· | Register carburettors with rotatable throttling valves

|  | F02M 13/00 |
Arrangements of two or more separate carburettors (apparatus for testing, tuning, or synchronising carburettors Fulltext... Hierarchy... Expanded...F02M 19/01; re-atomising condensed fuel or homogenising fuel-air mixture Fulltext... Hierarchy... Expanded...F02M 29/00); Carburettors using more than one fuel (apparatus for adding small quantities of secondary fuel Fulltext... Hierarchy... Expanded...F02M 25/00)

|  | F02M 13/02 |
· | Separate carburettors

|  | F02M 13/04 |
· · | structurally united

|  | F02M 13/06 |
· | the carburettors using different fuels

|  | F02M 13/08 |
· | Carburettors adapted to use liquid and gaseous fuels, e.g. alternatively

|  | F02M 15/00 |
Carburettors with heating, cooling, or thermal insulating means for combustion-air, fuel, or fuel-air mixture (heating, cooling, or thermally insulating float apparatus Fulltext... Hierarchy... Expanded...F02M 5/00; apparatus for thermally treating combustion-air, fuel, or fuel-air mixture, not being part of a carburettor Fulltext... Hierarchy... Expanded...F02M 31/00)

|  | F02M 15/02 |
· | with heating means, e.g. to combat ice-formation

|  | F02M 15/04 |
· · | the means being electrical

|  | F02M 15/06 |
· | Heat shieldings, e.g. from engine radiations

|  | F02M 17/00 |
Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups (apparatus for treating combustion-air, fuel, or fuel-air mixture by catalysts, electric means, magnetism, rays, sonic waves, or the like Fulltext... Hierarchy... Expanded...F02M 27/00; combinations of carburettors and low-pressure fuel-injection apparatus Fulltext... Hierarchy... Expanded...F02M 71/00)

|  | F02M 17/02 |
· | Floatless carburettors

|  | F02M 17/04 |
· · | having fuel inlet valve controlled by diaphragm

|  | F02M 17/06 |
· · | having overflow chamber determining constant fuel level

|  | F02M 17/08 |
· | Carburettors having one or more fuel passages opening in a valve-seat surrounding combustion-air passage, the valve being opened by passing air

|  | F02M 17/09 |
· · | the valve being of an eccentrically mounted butterfly type [5]

|  | F02M 17/10 |
· | Carburettors having one or more fuel passages opening in valve-member of air throttle

|  | F02M 17/12 |
· · | the valve-member being of butterfly type

|  | F02M 17/14 |
· | Carburettors with fuel-supply parts opened and closed in synchronism with engine stroke

|  | F02M 17/16 |
· | Carburettors having continuously-rotating bodies, e.g. surface carburettors (fuel injection by centrifugal forces Fulltext... Hierarchy... Expanded...F02M 69/06)

|  | F02M 17/18 |
· | Other surface carburettors

|  | F02M 17/20 |
· · | with fuel bath

|  | F02M 17/22 |
· · · | with air bubbling through bath

|  | F02M 17/24 |
· · | with wicks

|  | F02M 17/26 |
· · | with other wetted bodies

|  | F02M 17/28 |
· · · | fuel being drawn through a porous body

|  | F02M 17/30 |
· | Carburettors with fire-protecting devices, e.g. combined with fire-extinguishing apparatus

|  | F02M 17/32 |
· · | automatically closing fuel conduits on outbreak of fire

|  | F02M 17/34 |
· | Other carburettors combined or associated with other apparatus, e.g. air filters (predominant aspects of the apparatus, see the relevant classes for such apparatus)

|  | F02M 17/36 |
· | Carburettors having fitments facilitating their cleaning

|  | F02M 17/38 |
· | Controlling of carburettors, not otherwise provided for (external control gear Fulltext... Hierarchy... Expanded...F02M 19/12)

|  | F02M 17/40 |
· | Selection of particular materials for carburettors, e.g. sheet metal, plastic, or translucent materials

|  | F02M 17/42 |
· | Float-controlled carburettors not otherwise provided for

|  | F02M 17/44 |
· | Carburettors characterised by draught direction and not otherwise provided for

|  | F02M 17/46 |
· · | with down-draught

|  | F02M 17/48 |
· · | with up-draught

|  | F02M 17/50 |
· | Carburettors having means for combating ice-formation (thermally Fulltext... Hierarchy... Expanded...F02M 15/02)

|  | F02M 17/52 |
· | Use of cold, produced by carburettors, for other purposes (apparatus using the cold, see the relevant classes for such apparatus)

|  | F02M 19/00 |
Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02M 1/00-F02M 17/00 (measuring or testing apparatus in general Fulltext... Hierarchy... Expanded...G01)

|  | F02M 19/01 |
· | Apparatus for testing, tuning, or synchronising carburettors, e.g. carburettor flow stands [3]

|  | F02M 19/02 |
· | Metering-orifices, e.g. variable in diameter (variable during operation Fulltext... Hierarchy... Expanded...F02M 7/18)

|  | F02M 19/025 |
· · | Metering orifices not variable in diameter [4]

|  | F02M 19/03 |
· | Fuel atomising nozzles; Arrangement of emulsifying air conduits (atomising in general Fulltext... Hierarchy... Expanded...B05B) [4]

|  | F02M 19/035 |
· · | Mushroom-shaped atomising nozzles [4]

|  | F02M 19/04 |
· | Fuel-metering pins or needles

|  | F02M 19/06 |
· | Other details of fuel conduits

|  | F02M 19/08 |
· | Venturis

|  | F02M 19/10 |
· · | in multiple arrangement

|  | F02M 19/12 |
· | External control gear, e.g. having dash-pots (dampening means in later stages of multi-stage carburettors Fulltext... Hierarchy... Expanded...F02M 11/04; carburettor control gear in which the carburettor aspects do not predominate, see the relevant classes)

|  | F02M 21/00 |
Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form

|  | F02M 21/02 |
· | for gaseous fuels (apparatus for vaporising liquid fuel by heat Fulltext... Hierarchy... Expanded...F02M 31/00; engines with apparatus generating gas from solid fuel, e.g. from wood, Fulltext... Hierarchy... Expanded...F02B 43/08)

|  | F02M 21/04 |
· · | Gas-air mixing apparatus (carburettors adapted to use liquid and gaseous fuels Fulltext... Hierarchy... Expanded...F02M 13/08; carburetting gases in general Fulltext... Hierarchy... Expanded...C10J)

|  | F02M 21/06 |
· · | Apparatus for de-liquefying, e.g. by heating (discharging liquefied gases in general Fulltext... Hierarchy... Expanded...F17C)

|  | F02M 21/08 |
· | for non-gaseous fuels (for engines operating on fuel containing oxidants Fulltext... Hierarchy... Expanded...F02B)

|  | F02M 21/10 |
· · | for fuels with low melting point, e.g. apparatus having heating means

|  | F02M 21/12 |
· | for fuels in pulverised state (engine plants with fuel-pulverising apparatus Fulltext... Hierarchy... Expanded...F02B)

|  | F02M 23/00 - F02M 37/00 |
Engine-pertinent apparatus for feeding, or treating before their admission to engine, combustion-air, fuel, or fuel-air mixture

|  | F02M 23/00 |
Apparatus for adding secondary air to fuel-air mixture

|  | F02M 23/02 |
· | with personal control

|  | F02M 23/03 |
· · | the secondary air-valve controlled by main combustion-air throttle [5]

|  | F02M 23/04 |
· | with automatic control

|  | F02M 23/06 |
· · | dependent on engine speed

|  | F02M 23/08 |
· · | dependent on pressure in main combustion-air induction system

|  | F02M 23/09 |
· · · | using valves directly opened by low pressure [6]

|  | F02M 23/10 |
· · | dependent on temperature, e.g. engine temperature

|  | F02M 23/12 |
· | characterised by being combined with device for, or by secondary air effecting, re-atomising of condensed fuel

|  | F02M 23/14 |
· | characterised by adding hot air

|  | F02M 25/00 |
Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel, or fuel-air mixture (Fulltext... Hierarchy... Expanded...F02M 43/00 takes precedence; adding secondary air to fuel-air mixture Fulltext... Hierarchy... Expanded...F02M 23/00)

|  | F02M 25/02 |
( transferred to Fulltext... Hierarchy... Expanded...F02M 25/022 )

|  | F02M 25/022 |
· | Adding fuel and water emulsion, water or steam [6]

|  | F02M 25/025 |
· · | Adding water [6]

|  | F02M 25/028 |
· · · | into the charge intakes [6]

|  | F02M 25/03 |
· · · | into the cylinders [6]

|  | F02M 25/032 |
· · | Producing and adding steam [6]

|  | F02M 25/035 |
· · · | into the charge intakes [6]

|  | F02M 25/038 |
· · · | into the cylinders [6]

|  | F02M 25/04 |
( transferred to Fulltext... Hierarchy... Expanded...F02M 25/022 )

|  | F02M 25/06 |
· | adding lubricant vapours or exhaust gases

|  | F02M 25/07 |
· · | adding exhaust gases [5]

|  | F02M 25/08 |
· | adding fuel vapours drawn from engine fuel reservoir

|  | F02M 25/10 |
· | adding acetylene, non-waterborne hydrogen, non-airborne oxygen, or ozone

|  | F02M 25/12 |
· · | the apparatus having means for generating such gases (using rays and simultaneously generating ozone Fulltext... Hierarchy... Expanded...F02M 27/06)

|  | F02M 25/14 |
· | adding anti-knock agents, not provided for in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02M 25/022-F02M 25/10

|  | F02M 27/00 |
Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sonic waves, or the like

|  | F02M 27/02 |
· | by catalysts

|  | F02M 27/04 |
· | by electric means or magnetism

|  | F02M 27/06 |
· | by rays

|  | F02M 27/08 |
· | by sonic or ultrasonic waves

|  | F02M 29/00 |
Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture (combined with secondary-air supply Fulltext... Hierarchy... Expanded...F02M 23/12)

|  | F02M 29/02 |
· | having rotary parts

|  | F02M 29/04 |
· | having screens, gratings, baffles, or the like (rotary Fulltext... Hierarchy... Expanded...F02M 29/02)

|  | F02M 29/06 |
· · | generating whirling motion of mixture

|  | F02M 29/08 |
· · | having spirally-wound wires

|  | F02M 29/10 |
· · | adjustable

|  | F02M 29/12 |
· | having homogenising valves held open by mixture current

|  | F02M 29/14 |
· | re-atomising or homogenising being effected by unevenness of internal surfaces of mixture intake

|  | F02M 31/00 |
Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture (Fulltext... Hierarchy... Expanded...F02M 21/06, Fulltext... Hierarchy... Expanded...F02M 21/10 take precedence; such apparatus being part of a carburettor or fuel-injection apparatus Fulltext... Hierarchy... Expanded...F02M 15/00, Fulltext... Hierarchy... Expanded...F02M 53/00; adding hot secondary air to fuel-air mixture Fulltext... Hierarchy... Expanded...F02M 23/14)

|  | F02M 31/02 |
· | for heating

|  | F02M 31/04 |
· · | combustion-air or fuel-air mixture (electrically Fulltext... Hierarchy... Expanded...F02M 31/12; by using heat from working cylinders or cylinder heads Fulltext... Hierarchy... Expanded...F02M 31/14; heating of combustion-air as an engine starting aid Fulltext... Hierarchy... Expanded...F02N 17/04) [4]

|  | F02M 31/06 |
· · · | by hot gases, e.g. by mixing cold and hot air

|  | F02M 31/07 |
· · · · | Temperature-responsive control, e.g. using thermostatically-controlled valves (Fulltext... Hierarchy... Expanded...F02M 31/083 takes precedence) [6]

|  | F02M 31/08 |
· · · · | the gases being exhaust gases

|  | F02M 31/083 |
· · · · · | Temperature-responsive control of the amount of exhaust gas or combustion air directed to the heat exchange surface [6]

|  | F02M 31/087 |
· · · · · | Heat-exchange arrangements between the air intake and exhaust gas passages, e.g. by means of contact between the passages [5]

|  | F02M 31/093 |
· · · · · · | Air intake passage surrounding the exhaust gas passage; Exhaust gas passage surrounding the air intake passage [5]

|  | F02M 31/10 |
· · · | by hot liquids, e.g. lubricants

|  | F02M 31/12 |
· · | electrically

|  | F02M 31/125 |
· · · | Fuel [5]

|  | F02M 31/13 |
· · · | Combustion air [5]

|  | F02M 31/135 |
· · · | Fuel-air mixture [5]

|  | F02M 31/14 |
· · | by using heat from working cylinders or cylinder heads

|  | F02M 31/16 |
· · | Other apparatus for heating fuel

|  | F02M 31/18 |
· · · | to vaporise fuel

|  | F02M 31/20 |
· | for cooling (cooling of charging-air or of scavenging-air Fulltext... Hierarchy... Expanded...F02B)

|  | F02M 33/00 |
Other apparatus for treating combustion-air, fuel or fuel-air mixture (combustion-air cleaners Fulltext... Hierarchy... Expanded...F02M 35/00; arrangements for purifying liquid fuel Fulltext... Hierarchy... Expanded...F02M 37/22)

|  | F02M 33/02 |
· | for collecting and returning condensed fuel

|  | F02M 33/04 |
· · | returning to the intake passage [5]

|  | F02M 33/06 |
· · · | with simultaneous heat supply [5]

|  | F02M 33/08 |
· · | returning to the fuel tank [5]

|  | F02M 35/00 |
Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines (air cleaners in general Fulltext... Hierarchy... Expanded...B01D)

|  | F02M 35/02 |
· | Air cleaners

|  | F02M 35/022 |
· · | acting by gravity, by centrifugal, or by other inertial forces, e.g. with moistened walls [2]

|  | F02M 35/024 |
· · | using filters, e.g. moistened (Fulltext... Hierarchy... Expanded...F02M 35/026 takes precedence; cleaning of the filtering material Fulltext... Hierarchy... Expanded...F02M 35/08) [2]

|  | F02M 35/026 |
· · | acting by guiding the air over or through an oil or other liquid bath, e.g. combined with filters [2]

|  | F02M 35/04 |
· · | specially arranged with respect to engine; Mounting thereon

|  | F02M 35/06 |
· · · | combined or associated with engine's cooling blower or fan, or with flywheel

|  | F02M 35/08 |
· · | with means for removing dust from cleaners; with means for indicating clogging; with by-pass means

|  | F02M 35/09 |
· · · | Clogging indicators [6]

|  | F02M 35/10 |
· | Air intakes; Induction systems (using kinetic or wave energy of charge in induction systems for improving quantity of charge Fulltext... Hierarchy... Expanded...F02B)

|  | F02M 35/104 |
· · | Intake manifolds [6]

|  | F02M 35/108 |
· · · | with primary and secondary intake passages [6]

|  | F02M 35/112 |
· · · | for engines with cylinders all in one line (Fulltext... Hierarchy... Expanded...F02M 35/108 takes precedence) [6]

|  | F02M 35/116 |
· · · | for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft (Fulltext... Hierarchy... Expanded...F02M 35/108 takes precedence) [6]

|  | F02M 35/12 |
· | Intake silencers

|  | F02M 35/14 |
· | Combined air cleaners and silencers

|  | F02M 35/16 |
· | characterised by use in vehicles (predominant vehicle aspects, see the relevant classes for the vehicles)

|  | F02M 37/00 |
Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus (Fulltext... Hierarchy... Expanded...F02M 69/00 takes precedence; feeding liquid fuel to combustion apparatus, in general Fulltext... Hierarchy... Expanded...F23K 5/00; fuel supply to apparatus for generating combustion products of high pressure or high velocity Fulltext... Hierarchy... Expanded...F23R 3/28); Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines (separating apparatus, filters per se Fulltext... Hierarchy... Expanded...B01D; centrifuges Fulltext... Hierarchy... Expanded...B04B) [5]

|  | F02M 37/02 |
· | Feeding by means of suction apparatus, e.g. by air flow through carburettors (by driven pumps Fulltext... Hierarchy... Expanded...F02M 37/04)

|  | F02M 37/04 |
· | Feeding by means of driven pumps (pump construction Fulltext... Hierarchy... Expanded...F04)

|  | F02M 37/06 |
· · | mechanically driven

|  | F02M 37/08 |
· · | electrically driven

|  | F02M 37/10 |
· · · | submerged in fuel, e.g. in reservoir

|  | F02M 37/12 |
· · | fluid-driven, e.g. by compressed combustion-air

|  | F02M 37/14 |
· · | the pumps being combined with other apparatus

|  | F02M 37/16 |
· · | characterised by provision of personally-, e.g. manually-, operated pumps

|  | F02M 37/18 |
· · | characterised by provision of main and auxiliary pumps

|  | F02M 37/20 |
· | characterised by means for preventing vapour lock

|  | F02M 37/22 |
· | Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangement in the feeding system [3]

|  | F02M 39/00 - F02M 65/00 |
Fuel-injection apparatus (carrying the fuel into cylinders by high-pressure gas Fulltext... Hierarchy... Expanded...F02M 67/00; low-pressure fuel-injection Fulltext... Hierarchy... Expanded...F02M 69/00)

|  | F02M 39/00 |
Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements (arrangements of injectors Fulltext... Hierarchy... Expanded...F02M 61/14)

|  | F02M 39/02 |
· | Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives (Fulltext... Hierarchy... Expanded...F02M 49/00 takes precedence)

|  | F02M 41/00 |
Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor

|  | F02M 41/02 |
· | the distributor being spaced from pumping elements

|  | F02M 41/04 |
· · | the distributor reciprocating

|  | F02M 41/06 |
· · | the distributor rotating

|  | F02M 41/08 |
· | the distributor and pumping elements being combined

|  | F02M 41/10 |
· · | pump pistons acting as the distributor

|  | F02M 41/12 |
· · · | the pistons rotating to act as the distributor

|  | F02M 41/14 |
· · | rotary distributor supporting pump pistons

|  | F02M 41/16 |
· | characterised by the distributor being fed from a constant-pressure source, e.g. accumulator

|  | F02M 43/00 |
Fuel-injection apparatus operating simultaneously on two or more fuels or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive

|  | F02M 43/02 |
· | Pumps peculiar thereto

|  | F02M 43/04 |
· | Injectors peculiar thereto

|  | F02M 45/00 |
Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship (fuel injectors having such deliveries by means of valves furnished at seated ends with pintle- or plug-shaped extensions Fulltext... Hierarchy... Expanded...F02M 61/06)

|  | F02M 45/02 |
· | with each cyclic delivery being separated into two or more parts

|  | F02M 45/04 |
· · | with a small initial part

|  | F02M 45/06 |
· · · | Pumps peculiar thereto

|  | F02M 45/08 |
· · · | Injectors peculiar thereto

|  | F02M 45/10 |
· · | Other injectors with multiple-part delivery, e.g. with vibrating valves

|  | F02M 45/12 |
· | providing a continuous delivery with variable pressure

|  | F02M 47/00 |
Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure (Fulltext... Hierarchy... Expanded...F02M 49/00 takes precedence; apparatus with injection valves opened by fuel pressure and closed by non-fluid means, see the groups providing for other characteristics)

|  | F02M 47/02 |
· | of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves, and having means for periodically releasing that closing pressure

|  | F02M 47/04 |
· | using fluid, other than fuel, for injection-valve actuation

|  | F02M 47/06 |
· | Other fuel injectors peculiar thereto

|  | F02M 49/00 |
Fuel-injection apparatus in which injection pumps are driven, or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston

|  | F02M 49/02 |
· | using the cylinder pressure, e.g. compression end pressure

|  | F02M 49/04 |
· | using the piston impact

|  | F02M 51/00 |
Fuel-injection apparatus characterised by being operated electrically

|  | F02M 51/02 |
· | specially for low-pressure fuel-injection (pumps per se Fulltext... Hierarchy... Expanded...F02M 51/04; injectors per se Fulltext... Hierarchy... Expanded...F02M 51/08)

|  | F02M 51/04 |
· | Pumps peculiar thereto

|  | F02M 51/06 |
· | Injectors peculiar thereto

|  | F02M 51/08 |
· · | specially for low-pressure fuel-injection

|  | F02M 53/00 |
Fuel-injection apparatus characterised by having heating, cooling, or thermally-insulating means

|  | F02M 53/02 |
· | with fuel-heating means, e.g. for vaporising

|  | F02M 53/04 |
· | Injectors with heating, cooling, or thermally-insulating means

|  | F02M 53/06 |
· · | with fuel-heating means, e.g. for vaporising

|  | F02M 53/08 |
· · | with air cooling

|  | F02M 55/00 |
Fuel-injection apparatus characterised by their fuel conduits or their venting means

|  | F02M 55/02 |
· | Conduits between injection pumps and injectors

|  | F02M 55/04 |
· | Means for damping vibrations in injection-pump inlets

|  | F02M 57/00 |
Fuel injectors combined or associated with other devices

|  | F02M 57/02 |
· | Injectors structurally combined with fuel-injection pumps

|  | F02M 57/04 |
· | the devices being combustion-air intake or exhaust valves

|  | F02M 57/06 |
· | the devices being sparking-plugs

|  | F02M 59/00 |
Pumps specially adapted for fuel-injection and not provided for in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02M 39/00-F02M 57/00 (general features of pumps Fulltext... Hierarchy... Expanded...F04)

|  | F02M 59/02 |
· | of reciprocating-piston type

|  | F02M 59/04 |
· · | characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft

|  | F02M 59/06 |
· · · | with cylinders arranged radially to driving shaft, e.g. in V- or star-arrangement

|  | F02M 59/08 |
· · | characterised by two or more pumping elements with conjoint outlet

|  | F02M 59/10 |
· · | characterised by the piston drive

|  | F02M 59/12 |
· | having other positive-displacement pumping elements, e.g. rotary

|  | F02M 59/14 |
· · | of elastic-wall type

|  | F02M 59/16 |
· | characterised by having multi-stage compression of fuel

|  | F02M 59/18 |
· | characterised by the pumping action being achieved through release of pre-compressed springs

|  | F02M 59/20 |
· | Varying fuel delivery in quantity or timing

|  | F02M 59/22 |
· · | Varying quantity by adjusting cylinder-head space

|  | F02M 59/24 |
· · | with constant-length-stroke pistons having variable effective portion of stroke

|  | F02M 59/26 |
· · · | caused by movements of pistons relative to their cylinders

|  | F02M 59/28 |
· · · · | Mechanisms therefor

|  | F02M 59/30 |
· · | with variable-length-stroke pistons

|  | F02M 59/32 |
· · | fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection

|  | F02M 59/34 |
· · | by throttling of passages to pumping elements or of overflow passages

|  | F02M 59/36 |
· · | by variably-timed valves controlling fuel passages

|  | F02M 59/38 |
· | Pumps characterised by adaptations to special uses or conditions

|  | F02M 59/40 |
· · | for reversible engines

|  | F02M 59/42 |
· · | for starting of engines

|  | F02M 59/44 |
· | Details, component parts, or accessories not provided for in, or of interest apart from, the apparatus of groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02M 59/02-F02M 59/42

|  | F02M 59/46 |
· · | Valves (in general Fulltext... Hierarchy... Expanded...F16K)

|  | F02M 59/48 |
· · | Assembling; Disassembling; Replacing

|  | F02M 61/00 |
Fuel injectors not provided for in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02M 39/00-F02M 57/00

|  | F02M 61/02 |
· | of valveless type

|  | F02M 61/04 |
· | having valves (valves in general Fulltext... Hierarchy... Expanded...F16K)

|  | F02M 61/06 |
· · | the valves being furnished at seated ends with pintle- or plug-shaped extensions

|  | F02M 61/08 |
· · | the valves opening in direction of fuel flow

|  | F02M 61/10 |
· · | Other injectors with elongated valve bodies, i.e. of needle-valve type

|  | F02M 61/12 |
· · · | characterised by the provision of guiding or centring means for valve bodies

|  | F02M 61/14 |
· | Arrangements of injectors with respect to engines; Mounting of injectors

|  | F02M 61/16 |
· | Details not provided for in, or of interest apart from, the apparatus of groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02M 61/02-F02M 61/14

|  | F02M 61/18 |
· · | Injection nozzles, e.g. having valve-seats

|  | F02M 61/20 |
· · | Closing valves mechanically, e.g. arrangements of springs or weights

|  | F02M 63/00 |
Other fuel-injection apparatus having pertinent characteristics not provided for in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02M 39/00-F02M 57/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02M 39/00-F02M 61/00

|  | F02M 63/02 |
· | Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively

|  | F02M 63/04 |
· | Fuel-injection apparatus having injection valves held closed by a cyclically-operated mechanism for a time and automatically opened by fuel pressure, e.g. of constant-pressure pump or accumulator, when that mechanism releases the valve

|  | F02M 63/06 |
· | Use of pressure wave generated by fuel inertia to open injection valves

|  | F02M 65/00 |
Testing fuel-injection apparatus, e.g. testing injection timing

|  | F02M 67/00 - F02M 71/00 |
Fuel-injection by high-pressure gas carrying the fuel into engine working cylinders; Low-pressure fuel-injection

|  | F02M 67/00 |
Apparatus in which fuel-injection is effected by means of high-pressure gas, the gas carrying the fuel into working cylinders of the engine, e.g. air-injection type (using compressed air for low-pressure fuel-injection apparatus Fulltext... Hierarchy... Expanded...F02M 69/08)

|  | F02M 67/02 |
· | the gas being compressed air, e.g. compressed in pumps (arrangements or adaptations of such pumps Fulltext... Hierarchy... Expanded...F02B)

|  | F02M 67/04 |
· · | the air being extracted from working cylinders of the engine

|  | F02M 67/06 |
· | the gas being other than air, e.g. steam, combustion gas

|  | F02M 67/08 |
· · | the gas being generated by combustion of part of fuel other than in engine working cylinders

|  | F02M 67/10 |
· | Injectors peculiar thereto, e.g. of valveless type

|  | F02M 67/12 |
· · | having valves

|  | F02M 67/14 |
· | characterised by provisions for injecting different fuels, e.g. main fuel and readily self-igniting starting-fuel

|  | F02M 69/00 |
Low-pressure fuel-injection apparatus (electrically- operated Fulltext... Hierarchy... Expanded...F02M 51/00)

|  | F02M 69/02 |
· | Pumps peculiar thereto

|  | F02M 69/04 |
· | Injectors peculiar thereto

|  | F02M 69/06 |
· | characterised by the pressurisation of the fuel being caused by centrifugal force acting on the fuel

|  | F02M 69/08 |
· | characterised by the fuel being carried by compressed air into main stream of combustion-air

|  | F02M 69/10 |
· | peculiar to scavenged two-stroke engines, e.g. injecting into crankcase-pump chamber

|  | F02M 69/12 |
· | comprising a fuel-displaced free piston for intermittently metering and supplying fuel to injection nozzles [5]

|  | F02M 69/14 |
· | having cyclically-operated valves connecting injection nozzles to a source of fuel under pressure during the injection period [5]

|  | F02M 69/16 |
· | characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of injectors [5]

|  | F02M 69/18 |
· · | the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air (Fulltext... Hierarchy... Expanded...F02M 69/26 takes precedence) [5]

|  | F02M 69/20 |
· · · | the device being a servo-motor, e.g. using engine intake air pressure or vacuum (Fulltext... Hierarchy... Expanded...F02M 69/22 takes precedence) [5]

|  | F02M 69/22 |
· · · | the device comprising a member movably mounted in the air intake conduit and displaced according to the quantity of air admitted to the engine [5]

|  | F02M 69/24 |
· · · | the device comprising a member for transmitting the movement of the air throttle valve actuated by the operator to the valves controlling fuel passages [5]

|  | F02M 69/26 |
· · | the means varying fuel pressure in a fuel by-pass passage, the pressure acting on a throttle valve against the action of metered or throttled fuel pressure for variably throttling fuel flow to injection nozzles, e.g. to keep constant the pressure differential at the metering valve [5]

|  | F02M 69/28 |
· | characterised by means for cutting-out the fuel supply to the engine or to main injectors during certain operating periods, e.g. deceleration [5]

|  | F02M 69/30 |
· | characterised by means for facilitating the starting-up or idling of engines or by means for enriching fuel charge, e.g. below operational temperatures or upon high power demand of engines (at acceleration Fulltext... Hierarchy... Expanded...F02M 69/44) [5]

|  | F02M 69/32 |
· · | with an air by-pass around the air throttle valve or with an auxiliary air passage, e.g. with a variably controlled valve therein [5]

|  | F02M 69/34 |
· · | with an auxiliary fuel circuit supplying fuel to the engine, e.g. with the fuel pump outlet being directly connected to the injection nozzles [5]

|  | F02M 69/36 |
· · | having an enrichment mechanism modifying fuel flow to injectors, e.g. by acting on the fuel metering device or on the valves throttling fuel passages to injection nozzles or overflow passages [5]

|  | F02M 69/38 |
· · · | using fuel pressure, e.g. by varying fuel pressure in the control chambers of the fuel metering device (Fulltext... Hierarchy... Expanded...F02M 69/26 takes precedence) [5]

|  | F02M 69/40 |
· · · | using variably controlled air pressure, e.g. by modifying the intake air vacuum signal acting on the fuel metering device [5]

|  | F02M 69/42 |
· · · | using other means than variable fluid pressure, e.g. acting on the fuel metering device mechanically or electrically [5]

|  | F02M 69/44 |
· | characterised by means for supplying extra fuel to the engine on sudden air throttle opening, e.g at acceleration [5]

|  | F02M 69/46 |
· | Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F02M 69/02-F02M 69/44 [5]

|  | F02M 69/48 |
· · | Arrangement of air sensors [5]

|  | F02M 69/50 |
· · | Arrangement of fuel distributors [5]

|  | F02M 69/52 |
· · | Arrangement of fuel metering devices [5]

|  | F02M 69/54 |
· · | Arrangement of fuel pressure regulators [5]

|  | F02M 71/00 |
Combinations of carburettors and low-pressure fuel-injection apparatus (means for enriching charge on sudden air throttle opening of carburettors Fulltext... Hierarchy... Expanded...F02M 7/06)

|  | F02M 71/02 |
· | with fuel-air mixture being produced by the carburettor and being compressed by a pump for subsequent injection into main combustion-air (adaptations or arrangements of such pumps Fulltext... Hierarchy... Expanded...F02B)

|  | F02M 71/04 |
· | with carburettor being used at starting or idling only and injection apparatus being used during normal operation of engine