US3835828A - Fuel supply system - Google Patents

Fuel supply system Download PDF

Info

Publication number
US3835828A
US3835828A US00386980A US38698073A US3835828A US 3835828 A US3835828 A US 3835828A US 00386980 A US00386980 A US 00386980A US 38698073 A US38698073 A US 38698073A US 3835828 A US3835828 A US 3835828A
Authority
US
United States
Prior art keywords
fuel
pressure
spring
housing
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00386980A
Other languages
English (en)
Inventor
H Knapp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3835828A publication Critical patent/US3835828A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
    • F02M69/18—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors 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
    • F02M69/22—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors 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 the device comprising a member movably mounted in the air intake conduit and displaced according to the quantity of air admitted to the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/30—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel 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
    • F02M69/36—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel 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 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
    • F02M69/38—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel 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 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 using fuel pressure, e.g. by varying fuel pressure in the control chambers of the fuel metering device
    • F02M69/386—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel 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 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 using fuel pressure, e.g. by varying fuel pressure in the control chambers of the fuel metering device variably controlling the pressure of the fuel by-passing the metering valves, e.g. by valves responsive to signals of temperature or oxygen sensors

Definitions

  • FUEL SUPPLY SYSTEM BACKGROUND THE INVENTION valve are arranged successively in the air intake suction pipe of the engine, and the measuring means is moved, in proportion to the air amount flowing through the suction pipe, against an at least substantially constant resetting force and thereby displaces the movable member of a distributing valve arranged in the fuel line in order tometer a fuel amount proportional to the air amount, and wherein a pressure liquid of at least substantially constant pressure, which is continuously delivered through a pressure line, serves to transmit the resetting force and acts upon a control slide valve to effect the resetting, the pressure of the liquid being variable by means of at least one regulated pressure control valve which is controlled in dependence on characteristic engine data, and which contains a control cell whose operation is temperature-dependent.
  • This object is attained according to the invention by providing, as the control cell means in a fuel supply system of the type described above, a bimetal spring which is coupled to a heat-conducting tongue or strip heated immediately after starting by an electrical heater element.
  • the mounting of the bimetal spring is heatinsulated against the surrounding parts of the system, and, at temperatures below the operational temperature of the engine, the bimetal spring acts against the force of a control spring of the pressure control valve mentioned hereinbefore.
  • the heat-conducting tongue consists of a metal strip disposed in parallel with the bimetal spring and being in heat-conductive contact with the bimetal spring at their joint fastening point.
  • an electrical heater element On the free tongue end there is mounted an electrical heater element, and the metal strip may bend to adopt varying distances from the bimetal spring, in accordance with a controllable varying heat transfer by radiation onto the bimetal spring.
  • the heating of the bimetal spring can be regulated according to the requirements of the engine run with fuel from the fuel supply system improved according to the invention.
  • an electrical series resistance can be switched into the current lead-in of the electrical heater element, at low starting temperatures, by means of a second bimetallic spring. This affords an even slower heating-up of the bimetal springs in accordance with the actual conditions prevailing in the engine at low starting temperatures, and, thereby, the control pressure is adjusted in accordance with the flat-shaped engine heat-up curves corresponding to low starting temperatures.
  • FIG. 1 is a schematical view of a fuel supply system containing a preferred embodiment of control cell means according to the invention.
  • FIG. 2 shows a diagram in which the temperatures and the control pressures of the pressure liquid, shown on the ordinate, are plotted against the time, shown on the abscissa, with temperature-time curves for the heatup of the engine being interposed therebetween.
  • FIG. 1 there is shown a fuel supply system in which air for combustion flows in the direction indicated by arrows through an air filter 1 into a zone 3 of an airintake suction pipe, in which zone a measuring plate 4 is arranged, and further, through a flexible connecting tube 5, into a zone 6 of the suction tube, which zone 6 contains a randomly operable throttle valve 7; from suction tube zone 6, the air flows into one or several cylinders (not shown) of the internal combustion engine.
  • the measuring plate 4 is disposed in zone 3 transversely to the direction of air flow, and is displaceable in that zone in accordance with an approximately linear function of the air amount flowing through the suction tube.
  • the pressure prevailing between the measuring plate 4 and the throttle valve 7 remains constant, as long as the resetting force acting on measuring plate 4 and the air pressure prevailing upstream of measuring plate 4 also remain constant. Meaaway from nose ll.
  • lulu, uunsuring plate 4 controls directly a fuel metering and distributing valve 8.
  • the displacements of measuring plate 4 are transmitted by means of a lever connected thereto and being adapted for swivelling motion about a pivot 9, and from lever 10 via a protruding nose [1 to a control slide 12 hearing nose l1 and being displaceable in axial direction in a central bore 22 of central housing 8b of the fuel metering valve 8.
  • Central valve housing 8b is surrounded by an external housing part 80.
  • Fuel serving as a pressure liquid acts as a resetting force for measuring plate 4 on the frontal face 13 of control slide 12 at the opposite end of the latter from nose 11.
  • the supply of fuel to fuel metering valve 8 takes place by means of a fuel pump 16 driven by an electromotor 17.
  • Pump 16 aspirates fuel from a fuel reservoir 36 and delivers it via a fuel line 18 into a duct 19 provided in the external annular housing part 8a of fuel metering valve 8.
  • Duct 19 opens into an annular groove 20 extending about the periphery of central housing 812 between the latter and external housing part 812.
  • Radial bores 21 lead from annular groove 20 to the central bore 22 of central housing 8b.
  • Central axial bore 22 houses the control slide 22 which latter is of cylindrical shape and has in its middle portion a circumferential groove 23 constituted by a reduced diameter portion of slide 12 between the two full diameter end portions thereof.
  • slide groove 23 will register more or less completely with radial control slots 24 and 24 extending from the inner wall of bore 22 through central valve housing 8!) and communicating with ducts 25 and 25', respectively, which are provided in the external housing part 8a and are connected to fuel-injection valves (not slgwn) of the internal combustion engine, thus permitting metered fuel to flow to these injection valves.
  • a part of the fuel from annular groove 20 flows via a bypass duct 26 into an annular groove 27 provided in the periphery of central housing 8b and external housing part 8a in the end portion of central housing 8a away from slide nose 11.
  • Annular groove 27 communicates with a fuel line 29, leading away from the housing of valve 8, via radial bores 28.
  • groove 27 communicates via the same bores 28 and via a throttle passage 30 with a pressure chamber 31 being defined in central bore 22 between the end wall of the latter and the frontal face of control slide 12
  • Fuel flowing via line 29 to a pressure control valve 32 serves as the pressure fluid in the control system now to be described.
  • Valve 32 is a flat seat valve comprising a membrane 33 and rigid valve seat constituted by the rim of lead-in duct 34 into which line 29 opens. Overflowing excess fuel is recycled free from pressure through a return line 35 back to fuel reservoir 36.
  • Valve membrane 33 is biassed by means of a spring 37 whose initial tension is variable in dependence on engine data.
  • cam 38 which is mounted on a shaft 39, bearing the flap of throttle valve 7, for rotation with the latter, and is axially displaceable along shaft 39 in dependence on the reduced pressure prevailing in the suction tube downstream of throttle valve 7.
  • a rotation of shaft 39 is transmitted to cam 38 by means of an angle-shaped key 40.
  • the free end of cam 38 is rotatably mounted in a bearing 41a fastened on the adjacent face of a membrane 41 which separates the interior of valve 32, housing cam 38, from a reduced-pressure chamber 42.
  • the latter is connected by means of a line 43 to the zone 6 of the suction tube downstream of throttle valve 7.
  • cam 38 will be moved axially against the force of a compressible resetting spring 44.
  • a pencil-shaped pin 45 the blunt end of which follows cam 38, will be axially displaced by the movement of cam 38 and abuts with its opposite end the inner wall of a spring-retaining cap member 46. Displacement of the latter caused by the axial displacement of pin 45 will compress spring 37 which is retained by cap member 46. The degree of compression of spring 37 determines the pressure exerted by pressure liquid to reset the measuring plate 4.
  • a fuel line 50 branches off from line 29 and conveys fuel to a second pressure control valve 53 through fuel inlet 54, and fuel is recycled from valve 53 to the fuel reservoir36 through a fuel return line 55.
  • Pressure control valve 53 affords a temperature-dependent regulation of the resetting pressure exerted by the fuel portion serving as pressure liquid; this valve 53 comprises ing of fua inlet tube 57 which opening isobttirated by a valve membrane 58 which is biassed by a membrane spring 59 in valve-closing direction.
  • a tubular connecting member 60 is fastened at its one end in a bearing 61 attached to membrane 58 and rests with its other end in a bearing 62 attached to membrane spring 59, thus transmitting the valve-closing force of the latter spring to the former membrane.
  • a bimetallic blade spring 64 is fastened at its one end by means of a nut 67 to a bolt 65 mounted in the housing 53a of valve 53, while the other, free end of bimetallic spring 64 protrudes into the interior of valve housing 53a and is provided with a forked end 64a adapted for engaging bearing 62 on membrane spring 59.
  • An insulating means 66 is placed between bolt 65 and bimetallic spring 64 and prevents heat losses by the spring due to heat conduction to the housing 530 of valve 53.
  • a heat-conducting tongue 68 is fixed on bolt 65 jointly with bimetallic spring 64. it extends substantially parallel to the bimetallic spring 64 in valve housing 53a and is in heatconducting contact with spring 64 through their common mounting on bolt 65.
  • An electric heating coil 69 is mounted on tongue 68 and is connected to the plus pole of a current source through lead 70 and to ground via a lead 72 having a branch point 71 from where a first branch leads to another bimetallic spring 73 mounted in the wall of valve housing 53a to insure an adequate electrical insulation, the tongue of which bimetallic spring is adapted for making contact with contactor 76 connected to ground, and from where a second branch leads to contactor 76 via a series resistance 74 which can be bridged by bimetallic tongue 75.
  • Spring membrane 59 can also be replaced by another type of spring having a non-linear characteristic or a helical spring, in which case the tension could be varied by an adjusting screw mounted in the valve housing 53a and acting on a spring retaining disk or the like means, thus offering further possibilities for adjustment.
  • the fuel supply system provided with the control cell means according to the invention operates in the following manner.
  • gilat valve seat constituted by the rimabout the open:
  • pump 16 driven by electromotor 17 aspirates fuel out of fuel reservoir 36 and delivers it under pressure via line 18 to metering valve 8. Simultaneously, the internal combustion engine aspirates air into the suction tube (3, 5, 6) and the air flow displaces the measuring plate 4 from its rest position shown in FIG. 1.
  • lever which is rigidly attached to measuring plate 4 moves control slide 12 into axial bore 22 whereby communication between slots 24, 24 and annular groove 23 is widened and a greater cross sectional area is formed for the passage of fuel passing through slots 24, 24'.
  • the increased fuel amount thus flowing through passages 25 and 25' to the injection valves corresponds to the distance by which measuring plate 4 has moved from its rest position.
  • Part of the fuel passing through annular slide groove 23 flows through duct 26 into pressure chamber 31, thus exerting pressure on the frontal face 13 of control slide 12, and from chamber 31 onward through lines 29 and to control valves 32 and 53, respectively.
  • Measurable variables for load and speed of the internal combustion engine are the throttle valve position and pressure reduction in the suction tube; therefore, the resetting force is varied most readily in dependence of these values. This is achieved by varying the force of spring 37 in first pressure control valve 32 in accordance with the position of throttle valve 7, and therefore with the pressure level in the suction tube, by a corresponding rotation and/or axial displacement of cam 38. If, for instance, the throttle valve 7 is in a position under full load, in which the suction tube is completely open, a maximal performance is desired, Le. a relatively rich mixture is required.
  • cam 38 When the engine runs under no load, cam 38 is displaced against spring 44 due to a strongly reduced pressure in the suction tube, which results in a compression of spring 37 of the first pressure control valve 32.
  • the compression of spring 37 increases the resetting force of measuring plate 4, so that in spite of the leakage of small amounts of air which can escape past the closed throttle valve 7, no deflection of measuring plate 4 and, therefore, no fuel injection takes place.
  • the enrichment of the air/fuel mixture is determined by the control pressure influenced by pressure control valve 53.
  • control is effected in dependence on the ambient temperature at the start.
  • the closing force transmitted from membrane spring 59 onto membrane 58 determines the control pressure in the supply system.
  • bimetallic spring 64 arrests the bearing 62 and rests against the membrane spring 59 thereby diminishing the force transmitted onto membrane 58 via pin 60.
  • bimetallic spring 64 is warmed up by electrical heater element 69, thus bending spring 64 and reducing the arresting force exerted on membrane spring 59.
  • This force reduction is time-dependent and corresponds to the amount of heat transmitted onto bimetallic spring 64.
  • the electrical heater element 69 is not directly attached to bimetallic spring 64, but is mounted on the heat-conducting tongue 68, which can transmit its heat to the bimetallic spring 64 by heat conduction via their joint mounting. By bending heat conducting tongue 68 more or less strongly, the amount of thermal radiation which is transmitted to the bimetallic spring 64 can be varied.
  • the desired basic tension is obtained by screwing bolt 65 more or less deeply into the housing 53a of pressure control valve 53, or by changing the tension characteristic of membrane spring 59.
  • FIG. 2 shows these heating-up curves of the engine designated by d.
  • the heating-up of bimetallic spring 64 must be retarded still further which is achieved by means of the series resistance 74 in the current lead 72 from electrical heating coil 69 to ground.
  • series resistance 74 is bridged by the second bimetallic spring 73, so that electrical heating coil 69 is heated up with the full current available.
  • bimetallic spring 73 is shown in the position switching in series resistance 74.
  • This above-described improved system affords a regulation of the control pressure, and therewith also of the enrichment of the air/fuel mixture, which is adapted as far as possible to the actual operational requirements of the engine.
  • This system takes into account the considerable differences in heating-up periods of an engine which occur at different starting temperatures.
  • a fuel supply system for an externally ignited internal combustion engine with compression of the fuellair mixture, in which air flow-measuring means and a randomly operable throttle valve are arranged successively in the air intake suction pipe of the engine, and the measuring means is moved, in proportion to the air amount flowing through the suction pipe, against an at least substantially constant resetting force and thereby displaces a movable member of a distributing valve arranged in the fuel line in order to meter a fuel amount proportional to the air amount, and wherein a pressure liquid of at least substantially constant pressure, which is continuously delivered through a pressure line, serves to transmit the resetting force and acts upon a control slide valve to effect the resetting, the pressure of the liquid being variable by means of at least one regulated pressure control valve which is controlled in dependence on characteristic engine data, the improvement comprising, in combination, a control cell adapted for temperature-dependent operation and comprising a cell housing, bimetallic spring means, and heat-conducting tongue means jointly mounted in said housing for the conduction of
  • said tongue means comprise a metal strip arranged in parallel to said bimetallic spring means and having heat-transfer contact therewith at said joint mounting in said housing, said electrical heating means being mounted on a free part of said metallic strip.
  • control cell further comprises regulating means for regulating the heating up of said electrical heating means and thereby the degree of bending of said bimetallic strip.
  • said regulating means comprise a second bimetallic spring means and a series resistance which can be switched-in by said second bimetallic spring means at low starting temperatures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Temperature-Responsive Valves (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
US00386980A 1972-09-07 1973-08-09 Fuel supply system Expired - Lifetime US3835828A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2243921A DE2243921A1 (de) 1972-09-07 1972-09-07 Kraftstoffversorgungsanlage

Publications (1)

Publication Number Publication Date
US3835828A true US3835828A (en) 1974-09-17

Family

ID=5855709

Family Applications (1)

Application Number Title Priority Date Filing Date
US00386980A Expired - Lifetime US3835828A (en) 1972-09-07 1973-08-09 Fuel supply system

Country Status (4)

Country Link
US (1) US3835828A (enExample)
DE (1) DE2243921A1 (enExample)
FR (1) FR2163279A5 (enExample)
GB (1) GB1450579A (enExample)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3894523A (en) * 1973-05-29 1975-07-15 Bosch Gmbh Robert Fuel supply system
US3951120A (en) * 1973-08-10 1976-04-20 Robert Bosch G.M.B.H. Diaphragm-controlled pressure control valve assembly
US3963005A (en) * 1973-10-12 1976-06-15 Robert Bosch G.M.B.H. Fuel supply system
US3974809A (en) * 1973-03-16 1976-08-17 Robert Bosch G.M.B.H. Fuel injection system for spark plug-ignited internal combustion engines with compression of the air-fuel mixture
US3974811A (en) * 1974-01-24 1976-08-17 Robert Bosch G.M.B.H. Fuel injection system
US3983856A (en) * 1974-05-24 1976-10-05 Robert Bosch G.M.B.H. Fuel injection system
US3993034A (en) * 1974-05-13 1976-11-23 Robert Bosch G.M.B.H. Fuel injection system
US4026259A (en) * 1974-09-19 1977-05-31 Volkswagenwerk Aktiengesellschaft Fuel injection device for mixture-condensing, spark-ignited internal combustion engines
US4075995A (en) * 1975-01-21 1978-02-28 Robert Bosch Gmbh Fuel injection system
US4100904A (en) * 1973-09-28 1978-07-18 Robert Bosch Gmbh Fuel injection system
US4112897A (en) * 1975-11-26 1978-09-12 Daimler-Benz Aktiengesellschaft Rotational speed governor for an injection pump in air-compressing injection internal combustion engines
US4112900A (en) * 1975-05-07 1978-09-12 Robert Bosch Gmbh Fuel injection system
US4141330A (en) * 1976-05-22 1979-02-27 Robert Bosch Gmbh Pressure regulating valve for fuel injection systems
US4167167A (en) * 1975-04-03 1979-09-11 Daimler-Benz Aktiengesellschaft Internal combustion engine with externally controlled ignition
US4207849A (en) * 1977-08-30 1980-06-17 Toyota Jidosha Kogyo Kabushiki Kaisha Air-fuel ratio control apparatus of a fuel supply system for an internal combustion engine
US4257375A (en) * 1977-12-22 1981-03-24 Dr. Ing. H.C.F. Porsch Aktiengesellschaft Fuel injection system for mixture-compressing internal combustion engines with spark ignition

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680535A (en) * 1969-12-01 1972-08-01 Bosch Gmbh Robert Fuel injection system for combustion engines
US3730155A (en) * 1971-01-11 1973-05-01 Bosch Gmbh Robert Fuel injection apparatus for spark plug-ignited internal combustion engines
US3739762A (en) * 1972-01-24 1973-06-19 Petrol Injection Ltd Fuel injection systems
US3756213A (en) * 1970-08-20 1973-09-04 Honda Motor Co Ltd Internal combustion engine of the fuel injection type

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680535A (en) * 1969-12-01 1972-08-01 Bosch Gmbh Robert Fuel injection system for combustion engines
US3756213A (en) * 1970-08-20 1973-09-04 Honda Motor Co Ltd Internal combustion engine of the fuel injection type
US3730155A (en) * 1971-01-11 1973-05-01 Bosch Gmbh Robert Fuel injection apparatus for spark plug-ignited internal combustion engines
US3739762A (en) * 1972-01-24 1973-06-19 Petrol Injection Ltd Fuel injection systems

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974809A (en) * 1973-03-16 1976-08-17 Robert Bosch G.M.B.H. Fuel injection system for spark plug-ignited internal combustion engines with compression of the air-fuel mixture
US3894523A (en) * 1973-05-29 1975-07-15 Bosch Gmbh Robert Fuel supply system
US3951120A (en) * 1973-08-10 1976-04-20 Robert Bosch G.M.B.H. Diaphragm-controlled pressure control valve assembly
US4100904A (en) * 1973-09-28 1978-07-18 Robert Bosch Gmbh Fuel injection system
US3963005A (en) * 1973-10-12 1976-06-15 Robert Bosch G.M.B.H. Fuel supply system
US3974811A (en) * 1974-01-24 1976-08-17 Robert Bosch G.M.B.H. Fuel injection system
US3993034A (en) * 1974-05-13 1976-11-23 Robert Bosch G.M.B.H. Fuel injection system
US3983856A (en) * 1974-05-24 1976-10-05 Robert Bosch G.M.B.H. Fuel injection system
US4026259A (en) * 1974-09-19 1977-05-31 Volkswagenwerk Aktiengesellschaft Fuel injection device for mixture-condensing, spark-ignited internal combustion engines
US4075995A (en) * 1975-01-21 1978-02-28 Robert Bosch Gmbh Fuel injection system
US4167167A (en) * 1975-04-03 1979-09-11 Daimler-Benz Aktiengesellschaft Internal combustion engine with externally controlled ignition
US4112900A (en) * 1975-05-07 1978-09-12 Robert Bosch Gmbh Fuel injection system
US4112897A (en) * 1975-11-26 1978-09-12 Daimler-Benz Aktiengesellschaft Rotational speed governor for an injection pump in air-compressing injection internal combustion engines
US4141330A (en) * 1976-05-22 1979-02-27 Robert Bosch Gmbh Pressure regulating valve for fuel injection systems
US4207849A (en) * 1977-08-30 1980-06-17 Toyota Jidosha Kogyo Kabushiki Kaisha Air-fuel ratio control apparatus of a fuel supply system for an internal combustion engine
US4257375A (en) * 1977-12-22 1981-03-24 Dr. Ing. H.C.F. Porsch Aktiengesellschaft Fuel injection system for mixture-compressing internal combustion engines with spark ignition

Also Published As

Publication number Publication date
DE2243921A1 (de) 1974-03-14
GB1450579A (en) 1976-09-22
FR2163279A5 (enExample) 1973-07-20

Similar Documents

Publication Publication Date Title
US3835828A (en) Fuel supply system
US3680535A (en) Fuel injection system for combustion engines
JPS636739B2 (enExample)
US3730155A (en) Fuel injection apparatus for spark plug-ignited internal combustion engines
US3791359A (en) Fuel injection apparatus for externally ignited internal combustion engines operating on continuously injected fuel
US4132211A (en) Fuel injection system
US4174511A (en) Bimetal device with an electrical heating element
GB2129492A (en) I c engine fuel injection valve
US3894523A (en) Fuel supply system
US3974811A (en) Fuel injection system
US4333437A (en) Timing control apparatus for fuel injection pump
US4090487A (en) Fuel injection system
US5209211A (en) Throttle valve connection piece
US3983856A (en) Fuel injection system
US4475521A (en) Fuel injection pump for internal combustion engines
US3999527A (en) Fuel injection system
US4197823A (en) Supplementary air valve for a fuel supply apparatus
US3963005A (en) Fuel supply system
US4193384A (en) Fuel injection system
US4136653A (en) Pressure control valve assembly
US4227502A (en) Fuel injection system
US4245608A (en) Idling control apparatus for internal combustion engine
US3664319A (en) Internal combustion engine gasoline injection system
US4026259A (en) Fuel injection device for mixture-condensing, spark-ignited internal combustion engines
US3919992A (en) Fuel injection system