IPC 7 English version F02M 51/00-F02M 71/04

F02M05100-F02M07104

SECTION F – MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F 02

COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

F 02 M

SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF (charging such engines F02B)

51/

Fuel-injection apparatus characterised by being operated electrically

51/

specially for low-pressure fuel-injection (pumps per se F02M 51/04; injectors per se F02M 51/08)

51/

Pumps peculiar thereto

51/

Injectors peculiar thereto

51/

specially for low-pressure fuel-injection

53/

Fuel-injection apparatus characterised by having heating, cooling, or thermally-insulating means

53/

with fuel-heating means, e.g. for vaporising

53/

Injectors with heating, cooling, or thermally-insulating means

53/

with fuel-heating means, e.g. for vaporising

53/

with air cooling

55/

Fuel-injection apparatus characterised by their fuel conduits or their venting means

55/

Conduits between injection pumps and injectors

55/

Means for damping vibrations in injection-pump inlets

57/

Fuel injectors combined or associated with other devices

57/

Injectors structurally combined with fuel-injection pumps

57/

the devices being combustion-air intake or exhaust valves

57/

the devices being sparking-plugs

59/

Pumps specially adapted for fuel-injection and not provided for in groups F02M 39/00 to F02M 57/00 (general features of pumps F04)

59/

of reciprocating-piston type

59/

characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft

59/

with cylinders arranged radially to driving shaft, e.g. in V- or star-arrangement

59/

characterised by two or more pumping elements with conjoint outlet

59/

characterised by the piston drive

59/

having other positive-displacement pumping elements, e.g. rotary

59/

of elastic-wall type

59/

characterised by having multi-stage compression of fuel

59/

characterised by the pumping action being achieved through release of pre-compressed springs

59/

Varying fuel delivery in quantity or timing

59/

Varying quantity by adjusting cylinder-head space

59/

with constant-length-stroke pistons having variable effective portion of stroke

59/

caused by movements of pistons relative to their cylinders

59/

Mechanisms therefor

59/

with variable-length-stroke pistons

59/

fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection

59/

by throttling of passages to pumping elements or of overflow passages

59/

by variably-timed valves controlling fuel passages

59/

Pumps characterised by adaptations to special uses or conditions

59/

for reversible engines

59/

for starting of engines

59/

Details, component parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M 59/02 to F02M 59/42

59/

Valves (in general F16K)

59/

Assembling; Disassembling; Replacing

61/

Fuel injectors not provided for in groups F02M 39/00 to F02M 57/00

61/

of valveless type

61/

having valves (valves in general F16K)

61/

the valves being furnished at seated ends with pintle- or plug-shaped extensions

61/

the valves opening in direction of fuel flow

61/

Other injectors with elongated valve bodies, i.e. of needle-valve type

61/

characterised by the provision of guiding or centring means for valve bodies

61/

Arrangements of injectors with respect to engines; Mounting of injectors

61/

Details not provided for in, or of interest apart from, the apparatus of groups F02M 61/02 to F02M 61/14

61/

Injection nozzles, e.g. having valve-seats

61/

Closing valves mechanically, e.g. arrangements of springs or weights

63/

Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M 39/00 to 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 to F02M 61/00

63/

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

63/

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

63/

Use of pressure wave generated by fuel inertia to open injection valves

65/

Testing fuel-injection apparatus, e.g. testing injection timing

Fuel-injection by high-pressure gas carrying the fuel into engine working cylinders; Low-pressure fuel-injection

67/

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)

67/

the gas being compressed air, e.g. compressed in pumps (arrangements or adaptations of such pumps F02B)

67/

the air being extracted from working cylinders of the engine

67/

the gas being other than air, e.g. steam, combustion gas

67/

the gas being generated by combustion of part of fuel other than in engine working cylinders

67/

Injectors peculiar thereto, e.g. of valveless type

67/

having valves

67/

characterised by provisions for injecting different fuels, e.g. main fuel and readily self-igniting starting-fuel

69/

Low-pressure fuel-injection apparatus (electrically- operated F02M 51/00)

69/

Pumps peculiar thereto

69/

Injectors peculiar thereto

69/

characterised by the pressurisation of the fuel being caused by centrifugal force acting on the fuel

69/

characterised by the fuel being carried by compressed air into main stream of combustion-air

69/

peculiar to scavenged two-stroke engines, e.g. injecting into crankcase-pump chamber

69/

comprising a fuel-displaced free piston for intermittently metering and supplying fuel to injection nozzles [5]

69/

having cyclically-operated valves connecting injection nozzles to a source of fuel under pressure during the injection period [5]

69/

characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of injectors [5]

69/

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]

69/

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

69/

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]

69/

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]

69/

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]

69/

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

69/

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]

69/

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]

69/

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]

69/

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]

69/

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

69/

using variably controlled air pressure, e.g. by modifying the intake air vacuum signal acting on the fuel metering device [5]

69/

using other means than variable fluid pressure, e.g. acting on the fuel metering device mechanically or electrically [5]

69/

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

69/

Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M 69/02 to F02M 69/44 [5]

69/

Arrangement of air sensors [5]

69/

Arrangement of fuel distributors [5]

69/

Arrangement of fuel metering devices [5]

69/

Arrangement of fuel pressure regulators [5]

71/

Combinations of carburettors and low-pressure fuel-injection apparatus (means for enriching charge on sudden air throttle opening of carburettors F02M 7/06)

71/

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)

71/

with carburettor being used at starting or idling only and injection apparatus being used during normal operation of engine

F02M 31/00 - F02M 49/04