GB1506499A - Fuel injection systems for internal combustion engines - Google Patents

Fuel injection systems for internal combustion engines

Info

Publication number
GB1506499A
GB1506499A GB1747675A GB1747675A GB1506499A GB 1506499 A GB1506499 A GB 1506499A GB 1747675 A GB1747675 A GB 1747675A GB 1747675 A GB1747675 A GB 1747675A GB 1506499 A GB1506499 A GB 1506499A
Authority
GB
United Kingdom
Prior art keywords
solenoid valve
fuel
line
constant
valve
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
GB1747675A
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 GB1506499A publication Critical patent/GB1506499A/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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/0015—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for using exhaust gas sensors
    • F02D35/0046—Controlling fuel supply
    • F02D35/0092—Controlling fuel supply by means of fuel injection
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

1506499 Injection carburetters ROBERT BOSCH GmbH 28 April 1975 [13 May 1974] 17476/75 Heading F1B A fuel injection system for mixture-compressing, spark-ignition I.C. engines with continuous injection into the inlet manifold comprises a measuring element 2 arranged to be displaced within the inlet manifold through a distance proportional to the quantity of air flowing through the manifold, against a restoring force, and to thereby move a valve member 14 for metering a fuel quantity proportional to the air quantity, and the restoring force is provided by a fluid pressure acting at 15 on the valve member and variable by means of variations in the opening and closing working cycle of a solenoid valve 42 which is controllable via an electronic control circuit 52 by means of a temperature sensor via a lead 53 during engine warm-up and thereafter in dependence upon an engine operational variable such as the oxygen content of the exhaust gas as sensed by a probe 55. The control is effected by varying the mark-to space ratio of energizing pulses fed via a lead 51 to the solenoid valve 42. The pulse frequency may be constant or may be that of the engine ignition or a multiple thereof. The opening time of the solenoid valve may be constant, the frequency being varied in accordance with the operational variables. The fluid used is fuel, derived from a constant pressure fuel line 21, the solenoid valve 42 being connected in series with a restrictor 37 between the line 21 and a drain line 48. A further restrictor may be provided downstream of the solenoid valve. The line 21 is kept at constant pressure by means of a relief valve 23.
GB1747675A 1974-05-13 1975-04-28 Fuel injection systems for internal combustion engines Expired GB1506499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742423110 DE2423110A1 (en) 1974-05-13 1974-05-13 FUEL INJECTION SYSTEM

Publications (1)

Publication Number Publication Date
GB1506499A true GB1506499A (en) 1978-04-05

Family

ID=5915391

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1747675A Expired GB1506499A (en) 1974-05-13 1975-04-28 Fuel injection systems for internal combustion engines

Country Status (4)

Country Link
JP (1) JPS50158721A (en)
DE (1) DE2423110A1 (en)
FR (1) FR2271401B1 (en)
GB (1) GB1506499A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2001129B (en) * 1977-07-12 1982-08-04 Ntn Toyo Bearing Co Ltd FUEL FEEDING APPARATUS FOR air fuel combustion mixture
JPS5422020A (en) * 1977-07-20 1979-02-19 Toyota Motor Corp Air fuel ratio controller for fuel feed system of internal combustion engine
DE2810177C2 (en) * 1978-03-09 1982-10-21 Audi Nsu Auto Union Ag, 7107 Neckarsulm Fuel metering valve of a fuel injection system
DE3014033C2 (en) * 1980-04-11 1984-04-26 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Fuel injection system for mixture-compressing, externally ignited internal combustion engines with continuous injection into the intake manifold

Also Published As

Publication number Publication date
FR2271401B1 (en) 1979-08-03
DE2423110A1 (en) 1975-12-04
FR2271401A1 (en) 1975-12-12
JPS50158721A (en) 1975-12-22

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Legal Events

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