EP0253483A3 - An air fuel control, and a plunger and barrel assembly for a fuel system, either for an internal combustion engine - Google Patents

An air fuel control, and a plunger and barrel assembly for a fuel system, either for an internal combustion engine Download PDF

Info

Publication number
EP0253483A3
EP0253483A3 EP87304852A EP87304852A EP0253483A3 EP 0253483 A3 EP0253483 A3 EP 0253483A3 EP 87304852 A EP87304852 A EP 87304852A EP 87304852 A EP87304852 A EP 87304852A EP 0253483 A3 EP0253483 A3 EP 0253483A3
Authority
EP
European Patent Office
Prior art keywords
fuel
plunger
barrel
engine
air
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.)
Withdrawn
Application number
EP87304852A
Other languages
German (de)
French (fr)
Other versions
EP0253483A2 (en
Inventor
Robin J. Bremmer
Roscoe A. Baker
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.)
Cummins Inc
Original Assignee
Cummins Engine Co Inc
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 Cummins Engine Co Inc filed Critical Cummins Engine Co Inc
Publication of EP0253483A2 publication Critical patent/EP0253483A2/en
Publication of EP0253483A3 publication Critical patent/EP0253483A3/en
Withdrawn legal-status Critical Current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
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/06—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid
    • F02D1/065—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid of intake of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D7/00—Other fuel-injection control
    • F02D7/002—Throttling of fuel passages between pumps and injectors or overflow passages
    • F02D7/007—Throttling of fuel passages between pumps and injectors or overflow passages by fluid actuated means, e.g. slide valves
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/205—Quantity of fuel admitted to pumping elements being metered by an auxiliary metering device

Abstract

A tamper-proof air fuel control for a compression ignition type i.c. engine is provided wherein fuel is supplied to cylinders in response to the pressure of air in the intake manifold. A pair of oppositely biased springs (40 and 42) controls movement of a stem valve (30) in response to intake manifold air pressure exerted on a flexible diaphragm (28) located between the springs (40 and 42). The stem valve (30) includes a plunger (32) within a barrel (31) in the air fuel control housing (20) in the engine fuel pump. The cross-sectional profiles of the plunger (32) and barrel (31) are designed to meter precisely a control­ led amount of fuel to the engine fuel supply system as the intake air pressure increases and to reduce this metered flow as the intake air pressure decreases. A class fit between the barrel (31) and plunger (32) wherein the clearance must not exceed 1905 × 10⁻⁹ metres to 3175 × 10⁻⁹ metres (0.000075 to 0.000125 inches) and pressure regulating means in the plunger (32) substantially eliminate fuel leakage from the barrel (31). Internal venting means are provided to direct any minimal amount of fuel which might leak to the engine crankcase.
EP87304852A 1986-07-14 1987-06-02 An air fuel control, and a plunger and barrel assembly for a fuel system, either for an internal combustion engine Withdrawn EP0253483A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US88520086A 1986-07-14 1986-07-14
US885200 1986-07-14

Publications (2)

Publication Number Publication Date
EP0253483A2 EP0253483A2 (en) 1988-01-20
EP0253483A3 true EP0253483A3 (en) 1989-04-12

Family

ID=25386383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87304852A Withdrawn EP0253483A3 (en) 1986-07-14 1987-06-02 An air fuel control, and a plunger and barrel assembly for a fuel system, either for an internal combustion engine

Country Status (2)

Country Link
EP (1) EP0253483A3 (en)
JP (1) JPS6388270A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795233A (en) * 1972-05-19 1974-03-05 Caterpillar Tractor Co Fuel-air ratio control for supercharged engines
FR2362279A1 (en) * 1976-08-18 1978-03-17 Cummins Engine Co Inc FUEL SUPPLY SYSTEM
US4187817A (en) * 1978-10-05 1980-02-12 Cummins Engine Company, Inc. Apparatus and method for averting the effects of seal failure in an I.C. engine fuel supply system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5122927A (en) * 1974-08-19 1976-02-24 Automobile Antipollution NENRYOFUNSHAHONPU
DE2821874C3 (en) * 1978-05-19 1981-10-01 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
JPS5751544A (en) * 1980-09-10 1982-03-26 Yuushin:Kk Control device of motor for windshield wiper

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795233A (en) * 1972-05-19 1974-03-05 Caterpillar Tractor Co Fuel-air ratio control for supercharged engines
FR2362279A1 (en) * 1976-08-18 1978-03-17 Cummins Engine Co Inc FUEL SUPPLY SYSTEM
US4187817A (en) * 1978-10-05 1980-02-12 Cummins Engine Company, Inc. Apparatus and method for averting the effects of seal failure in an I.C. engine fuel supply system

Also Published As

Publication number Publication date
JPS6388270A (en) 1988-04-19
EP0253483A2 (en) 1988-01-20

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Effective date: 19891013

RIN1 Information on inventor provided before grant (corrected)

Inventor name: BREMMER, ROBIN J.

Inventor name: BAKER, ROSCOE A.