F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
ENGINES OR PUMPS
 F01 - 
F04

Note(s)

Guide to the use of this subsection (classes F01-F04)

The following notes are meant to assist in the use of this part of the classification scheme.

  1. In this subsection, subclasses or groups designating "engines" or "pumps" cover methods of operating the same, unless otherwise specifically provided for.
  2. 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 and 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; machines or engines with no, or only slight, pressure/velocity transformation in the rotor are called "impulse type".
  3. In this subsection:
  4. For use of this subsection with a good understanding, it is essential to remember, so far as subclasses F01B, F01C, F01D, F03B, and F04B, F04C, F04D, which form its skeleton, are concerned:

 F02
COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
 F02M
SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF (charging such engines F02B)
 F02M

Note(s)

  1. 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.
  2. Attention is drawn to the Notes preceding class F01.
 F02M 1/00 - 
F02M 19/00
Carburettors (for gaseous fuels F02M 21/00; combined with low-pressure fuel-injection apparatus 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 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 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 (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 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 F02M 15/02)
 F02M 3/09
·  ·  Valves responsive to engine conditions, e.g. manifold vacuum (F02M 1/00, 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 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 F02M 1/00)
 F02M 7/02
·  Carburettors having aerated fuel spray nozzles (with valve control for amount of air for aerating fuel 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 (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 F02M 1/18)  [5]
 F02M 7/12
·  Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves (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 F02M 1/18)  [5]
 F02M 7/133
·  ·  Auxiliary jets, i.e. operating only under certain conditions, e.g. full power (F02M 7/04, 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 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 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 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 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 (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 F02M 19/01; re-atomising condensed fuel or homogenising fuel-air mixture F02M 29/00); Carburettors using more than one fuel (apparatus for adding small quantities of secondary fuel 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 F02M 5/00; apparatus for thermally treating combustion-air, fuel, or fuel-air mixture, not being part of a carburettor, per se 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 F02M 27/00; combinations of carburettors and low-pressure fuel-injection apparatus 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 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 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 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 F02M 1/00-F02M 17/00 (measuring or testing apparatus per se 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 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 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 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 F02M 31/00; engines with apparatus generating gas from solid fuel, e.g. from wood, F02B 43/08)
 F02M 21/04
·  ·  Gas-air mixing apparatus (carburettors adapted to use liquid and gaseous fuels F02M 13/08; carburetting gases in general C10J)
 F02M 21/06
·  ·  Apparatus for de-liquefying, e.g. by heating (discharging liquefied gases in general F17C)
 F02M 21/08
·  for non-gaseous fuels (for engines operating on fuel containing oxidants 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 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 23/10
·  ·  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 (F02M 43/00 takes precedence; adding secondary air to fuel-air mixture F02M 23/00)
 F02M 25/02
·  adding water or steam
 F02M 25/04
·  ·  the apparatus being combined or associated with combustion-air filter
 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 F02M 27/06)
 F02M 25/14
·  adding anti-knock agents, not provided for in groups F02M 25/02-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 F02M 23/12)
 F02M 29/02
·  having rotary parts
 F02M 29/04
·  having screens, gratings, baffles, or the like (rotary 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 (F02M 21/06, F02M 21/10 take precedence; such apparatus being part of a carburettor or fuel-injection apparatus F02M 15/00, F02M 53/00; adding hot secondary air to fuel-air mixture F02M 23/14)
 F02M 31/02
·  for heating
 F02M 31/04
·  ·  combustion-air or fuel-air mixture (electrically F02M 31/12; by using heat from working cylinders or cylinder heads F02M 31/14; heating of combustion-air as an engine starting aid F02N 17/04)  [4]
 F02M 31/06
·  ·  ·  by hot gases, e.g. by mixing cold and hot air
 F02M 31/08
·  ·  ·  ·  the gases being exhaust gases
 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 F02B)
 F02M 33/00
Other apparatus for treating combustion-air, fuel or fuel-air mixture (combustion-air cleaners F02M 35/00; arrangements for purifying liquid fuel 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 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 (F02M 35/026 takes precedence; cleaning of the filtering material 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 35/10
·  Air intakes; Induction systems (using kinetic or wave energy of charge in induction systems for improving quantity of charge F02B)
 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 (F02M 69/00 takes precedence; feeding liquid fuel to combustion apparatus, in general F23K 5/00; fuel supply to apparatus for generating combustion products of high pressure or high velocity F23R 3/28); Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines (separating apparatus, filters per se B01D; centrifuges B04B)  [5]
 F02M 37/02
·  Feeding by means of suction apparatus, e.g. by air flow through carburettors (by driven pumps F02M 37/04)
 F02M 37/04
·  Feeding by means of driven pumps (pump construction 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 F02M 67/00; low-pressure fuel-injection F02M 69/00)
 F02M 39/00
Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements (arrangements of injectors F02M 61/14)
 F02M 39/02
·  Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives (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 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 (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 F02M 51/04; injectors per se 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 F02M 39/00-F02M 57/00 (general features of pumps 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 F02M 59/02-F02M 59/42
 F02M 59/46
·  ·  Valves (in general F16K)
 F02M 59/48
·  ·  Assembling; Disassembling; Replacing
 F02M 61/00
Fuel injectors not provided for in groups F02M 39/00-F02M 57/00
 F02M 61/02
·  of valveless type
 F02M 61/04
·  having valves (valves in general 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 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 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 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 F02M 69/08)
 F02M 67/02
·  the gas being compressed air, e.g. compressed in pumps (arrangements or adaptations of such pumps 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 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 (F02M 69/26 takes precedence)  [5]
 F02M 69/20
·  ·  ·  the device being a servo-motor, e.g. using engine intake air pressure or vacuum (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 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 (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 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 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 F02B)
 F02M 71/04
·  with carburettor being used at starting or idling only and injection apparatus being used during normal operation of engine