GB1485838A - Fuel injection systems - Google Patents

Fuel injection systems

Info

Publication number
GB1485838A
GB1485838A GB42065/74A GB4206574A GB1485838A GB 1485838 A GB1485838 A GB 1485838A GB 42065/74 A GB42065/74 A GB 42065/74A GB 4206574 A GB4206574 A GB 4206574A GB 1485838 A GB1485838 A GB 1485838A
Authority
GB
United Kingdom
Prior art keywords
fuel
diaphragm
chamber
valve
spring
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
Application number
GB42065/74A
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
Publication of GB1485838A publication Critical patent/GB1485838A/en
Expired legal-status Critical Current

Links

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
    • F02M69/30—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
    • F02M69/42—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 other means than variable fluid pressure, e.g. acting on the fuel metering device mechanically or electrically
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

1485838 Fuel injection systems ROBERT BOSCH GmbH 27 Sept 1974 [28 Sept 1973] 42065/74 Heading F1B A fuel injection system for mixture compressing, spark-ignited I.C. engines with continuous injection into the intake pipe, comprises an air-flow measuring element and a throttle valve in series in the intake pipe, the measuring element being, in use, arranged to be displaced against a restoring force through a distance proportional to the quantity of air flowing through the intake pipe and to adjust a movable part of a fuel metering valve, the fuel pressure within the system being variable so that it can be reduced to produce enrichment of the fuel/ air mixture during the warming-up phase of the engine. Air drawn into intake pipe 1 angularly displaces a flap 2, hinged along one edge on axle 3. A spring 4 resists the movement, which is transmitted by coupling 6 to rotary valve-member 7. Pump 10 supplies fuel from tank 11 to passage 13, annular groove 14 in member 7, passage 15 and chamber 16 where it acts on one side of diaphragm 17. Fuel is able to return to tank 11, via pipe 23, when the pressure in chamber 16 lifts diaphragm 17 off valve seat 22. Fuel from annular groove 14 also enters longitudinal groove 18 which overlaps a groove 19 in the surrounding bore to a greater or lesser extent according to the angular position of flap 2. From groove 19 fuel passes through passage 20 to chamber 21, where it acts on the other face of diaphragm 17, and then to chamber 26 where it unseats diaphragm 17 from valve seat 29 and passes through passage 30 to enter the intake pipe at a point immediately downstream of the throttle valve. Diaphragm 17 is held against seat 29 by ball 33 loaded by spring 31. A bi-metallic strip 35, when cold, acts against spring 31 to reduce its effective force and hence the pressure which must be developed in chamber 26 to unseat the diaphragm. An electrically powered heater 36 is provided which when energized causes strip 35 to bend towards diaphragm 17 so that spring 31 acts with a maximum force on ball 33. In the chamber 21 a spring 40 which biases valve 24 in the closing direction abuts a piston 43 at one end and at the other end bears on a plate 41 which is rigidly attached to ball 42. Fuel which has passed through the metering valve and which leaks past piston 43 passes along a pipe 49 to the inlet manifold to a point downstream of the throttle valve.
GB42065/74A 1973-09-28 1974-09-27 Fuel injection systems Expired GB1485838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732348860 DE2348860A1 (en) 1973-09-28 1973-09-28 FUEL INJECTION SYSTEM

Publications (1)

Publication Number Publication Date
GB1485838A true GB1485838A (en) 1977-09-14

Family

ID=5893994

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42065/74A Expired GB1485838A (en) 1973-09-28 1974-09-27 Fuel injection systems

Country Status (6)

Country Link
JP (1) JPS5060629A (en)
BR (1) BR7408008D0 (en)
DE (1) DE2348860A1 (en)
FR (1) FR2245857A1 (en)
GB (1) GB1485838A (en)
SE (1) SE7412128L (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5214127A (en) * 1975-07-23 1977-02-02 Nippon Soken Inc Fuel control device for internal combustion engine
JPS5244336A (en) * 1975-10-07 1977-04-07 Nippon Soken Inc Fuel control device used for an internal combustion engine
DE2546560A1 (en) * 1975-10-17 1977-04-28 Bosch Gmbh Robert FUEL INJECTION SYSTEM FOR EXTERNAL-IGNITION COMBUSTION MACHINES
DE2703722C2 (en) * 1977-01-29 1986-09-04 Audi AG, 8070 Ingolstadt Fuel injection system
DE2742797A1 (en) * 1977-09-23 1979-04-05 Bosch Gmbh Robert FUEL INJECTION SYSTEM
DE2810177C2 (en) * 1978-03-09 1982-10-21 Audi Nsu Auto Union Ag, 7107 Neckarsulm Fuel metering valve of a fuel injection system
DE2927110A1 (en) * 1979-07-05 1981-01-08 Audi Nsu Auto Union Ag FUEL INJECTION SYSTEM

Also Published As

Publication number Publication date
JPS5060629A (en) 1975-05-24
FR2245857A1 (en) 1975-04-25
DE2348860A1 (en) 1975-04-10
SE7412128L (en) 1975-04-01
BR7408008D0 (en) 1975-09-16

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee