GB2021689A - Controlling carburettors - Google Patents

Controlling carburettors

Info

Publication number
GB2021689A
GB2021689A GB7917388A GB7917388A GB2021689A GB 2021689 A GB2021689 A GB 2021689A GB 7917388 A GB7917388 A GB 7917388A GB 7917388 A GB7917388 A GB 7917388A GB 2021689 A GB2021689 A GB 2021689A
Authority
GB
United Kingdom
Prior art keywords
fuel
valve
chamber
metering valve
diaphragm
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.)
Granted
Application number
GB7917388A
Other versions
GB2021689B (en
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.)
Pierburg GmbH
Original Assignee
Pierburg 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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of GB2021689A publication Critical patent/GB2021689A/en
Application granted granted Critical
Publication of GB2021689B publication Critical patent/GB2021689B/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
    • F02M69/16—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
    • F02M69/26—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 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
    • 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
    • F02M69/20—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 being a servo-motor, e.g. using engine intake air pressure or vacuum
    • 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
    • F02M69/40—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 variably controlled air pressure, e.g. by modifying the intake air vacuum signal acting on the fuel metering device

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)

Abstract

In a carburettor for continuously injecting fuel into an I.C. engine induction passage, an air throttling body 7 is adjustable axially by suction in a chamber 11 ventable to atmosphere and fuel flow is determined by the position of the throttling body 7 when the pressure drop across a fuel-metering valve 4 movable therewith remains constant, the pressure drop being nevertheless variable, by a differential pressure valve 26, in dependence on engine operating conditions. The valve 26 has a diaphragm 34 separating chambers 27, 32 of which chamber 27 forms part of the fuel line downstream of the fuel-metering valve 4, the cross- sectional area of a fuel outlet 29 from the chamber 27 to a nozzle 14 is adjusted by a valve needle 28, fuel at the pressure upstream of the fuel-metering valve 4 acts in the chamber 32, and a force dependent on induction passage suction and engine temperature is applied to the diaphragm 34 of the differential pressure valve 26. <IMAGE>
GB7917388A 1978-05-19 1979-05-18 Controlling carburettors Expired GB2021689B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2821874A DE2821874C3 (en) 1978-05-19 1978-05-19 Fuel supply system with a fuel metering valve for mixture-compressing, externally ignited internal combustion engines with continuous fuel addition into the intake manifold

Publications (2)

Publication Number Publication Date
GB2021689A true GB2021689A (en) 1979-12-05
GB2021689B GB2021689B (en) 1982-06-23

Family

ID=6039719

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7917388A Expired GB2021689B (en) 1978-05-19 1979-05-18 Controlling carburettors

Country Status (6)

Country Link
JP (1) JPS5514993A (en)
DE (1) DE2821874C3 (en)
FR (1) FR2426160A2 (en)
GB (1) GB2021689B (en)
IT (1) IT1164001B (en)
SE (1) SE7904374L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5835265A (en) * 1981-08-25 1983-03-01 Mitsubishi Electric Corp Device for regulating quantity of fuel-air mixture
EP0253483A3 (en) * 1986-07-14 1989-04-12 Cummins Engine Company, Inc. An air fuel control, and a plunger and barrel assembly for a fuel system, either for an internal combustion engine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH255804A (en) * 1946-04-09 1948-07-15 Schneebeli Hugo Carburetor.
DE2036824A1 (en) * 1970-07-24 1972-01-27 Robert Bosch Gmbh, 7000 Stuttgart Fuel injection system for mixture-compressing, spark-ignited internal combustion engines
DE2346099A1 (en) * 1973-09-13 1975-03-27 Bosch Gmbh Robert FUEL INJECTION SYSTEM
GB1537053A (en) * 1975-02-07 1978-12-29 British Leyland Uk Ltd Fuel system for an internal combustion engine
DE2520322C3 (en) * 1975-05-07 1979-02-15 Robert Bosch Gmbh, 7000 Stuttgart Fuel injection system for internal combustion engines
GB1546074A (en) * 1975-05-15 1979-05-16 Tecalemit Ltd Fuel injection systems for internal combustion engine
DE2529700A1 (en) * 1975-07-03 1977-01-27 Bosch Gmbh Robert FUEL SUPPLY SYSTEM
DE2717230C3 (en) * 1977-04-19 1981-09-24 Pierburg Gmbh & Co Kg, 4040 Neuss Fuel supply system with a fuel metering valve for mixture-compressing, externally ignited internal combustion engines with continuous fuel addition into the intake manifold

Also Published As

Publication number Publication date
JPS5514993A (en) 1980-02-01
IT1164001B (en) 1987-04-08
GB2021689B (en) 1982-06-23
IT7949089A0 (en) 1979-05-18
SE7904374L (en) 1979-11-20
DE2821874C3 (en) 1981-10-01
FR2426160A2 (en) 1979-12-14
DE2821874A1 (en) 1979-11-22
DE2821874B2 (en) 1981-02-05

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Legal Events

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