US3683870A - Fuel injection systems - Google Patents

Fuel injection systems Download PDF

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Publication number
US3683870A
US3683870A US46201A US3683870DA US3683870A US 3683870 A US3683870 A US 3683870A US 46201 A US46201 A US 46201A US 3683870D A US3683870D A US 3683870DA US 3683870 A US3683870 A US 3683870A
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US
United States
Prior art keywords
fuel
engine
operable
valve
operating parameter
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
US46201A
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English (en)
Inventor
Harold Ernest Jackson
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.)
Petrol Injection Ltd
Original Assignee
Petrol Injection Ltd
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 Petrol Injection Ltd filed Critical Petrol Injection Ltd
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Publication of US3683870A publication Critical patent/US3683870A/en
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    • 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
    • F02M69/44—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for supplying extra fuel to the engine on sudden air throttle opening, e.g. at acceleration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/32—Controlling fuel injection of the low pressure type
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/02—Fuel-injection apparatus characterised by being operated electrically specially for low-pressure 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0667—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature acting as a valve or having a short valve body attached thereto
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure 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
    • F02M69/14—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel having cyclically-operated valves connecting injection nozzles to a source of fuel under pressure during the injection period
    • F02M69/145—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel having cyclically-operated valves connecting injection nozzles to a source of fuel under pressure during the injection period the valves being actuated 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
    • F02M69/30—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

Definitions

  • This invention relates to fuel injection systems for internal combustion engines and, in particular,.to systems in which the injection of fuel is intermittent rather than continuous.
  • fuel is injected in timed relation to engine operation, the injection being controlled by an engine-driven mechanical or electrical device.
  • the control mechanism may include an operating pulse generating circuit at least one component of which is responsive to the said one engine operating parameter and adjustable in response to variations in that parameter to adjust the operating pulse length.
  • the operating pulse generating circuit is an astable multivibrator circuit including at least one resistive component which is responsive to the said one engine operating parameter and is adjustable in response to variations in that parameter to adjust the operating pulse length.
  • the control mechanism includes a reference voltage generator operable to generate a reference voltage which varies periodically with time, a control signal generator operable to generate a control signal which varies in response to variations in the said one engine operating parameter, and an operating pulse generator responsive to the reference voltage and'the control signal to generate an operating pulse when the reference voltage bears a predetermined relationship to the control signal.
  • the reference voltage generator is a sawtooth waveform generator and the control signal generator is operable to generate a bias voltage the level of which varies in response to variations in the said one engine operating parameter, the operating pulse generator being operable to generate an operating pulse when the reference voltage exceeds the bias voltage.
  • FIG. 2 is a circuit diagram of a component of the system
  • FIG. 4 is a block circuit diagramof an alternative form of the component illustrated in FIG. 2, and
  • fuel is drawn from a tank 1 and supplied by any suitable form of pump 2, for example an electric, gear pump, to a supply conduit 52.
  • Fuel passes from the conduit 52. to a further supply conduit 63 at a pressure determined by a control valve mechanism 100, and excess fuel is returned to the tank 1 via a chamber 53 in mechanism 100, a conduit 56, a relief valve 57 and a conduit 61.
  • the conduit 63 leads to thefuel injector nozzles 83 via a check valve 63A and excess fuel is returned from the nozzles to the tank 1 via a restrictor 61A and the conduit 61.
  • the unit is designed. to produce a pulsating DC. voltage when connected to a suitable source of electrical power 201, the pulses occurring at a suitable constant frequency.
  • the pulses are applied to the operating solenoids of the injectors 83 which are connected, as shown, to the output terminals of the unit 200.
  • the injectors 83 are thus caused to open at regular intervals (determined by the commencement of each one of the pulses from unit 200) to discharge fuel supplied through the conduit 63.
  • the fuel is discharged into the mixture induction manifold of the engine, to be drawn into the engine cylinders, and when the operating pulse from unit 200 terminates, the injectors close and fuel discharge ceases.
  • the length of the pulses generated by unit 200 and hence the period for which the injectors remain open is dependent on engine air intake.
  • the lever 7 is also coupled to one side of a piston 8A located in a cylinder 8B.
  • the cylinder 88 is connected, by a conduit 18 including a restrictor 18A, to a chamber 20 in a manifold depression control unit 102.
  • the unit 102 functions through the air valve 4 to maintain a constant depression in the air intake conduit 3 between the air valve 4 and the throttle valve 1.
  • the manner of operation of the unit 102 is exactly the same as that of the mechanism 102 described in my copending U.S. Pat. application Ser. No. 31,316 filed Apr., 23, 1970.
  • chamber 53 receives excess fuel from the supply conduit 52 and is connected, via relief valve 57 to the fuel tank 1.
  • the chamber 53 is,
  • valve of the restrictor 95a is chosen to give a desired opening speed to the ball valve 21A.
  • the depression between valves 1 and 4 may rise momentarily, for example to 2 inch Hg. This in turn raises the fuel pressure in conduit 63 to 20 psi.
  • the metering pressure is now 20 15 17 18 psi.
  • the fuel metering pressure has changed in the ratio 2.25/1, providing enrichment during acceleraq tion.
  • valve 101A was referred to above as having utility under engine starting conditions it is not restricted to use under these conditions and could, being a manually-operated valve, be used whenever a richer fuel/air mixture is required. It will also be appreciated that the valve 101A is not essential to the functioning of the manifold depression control unit 102 or (except in so far as it provides a restriction 66A, 668 through which atmospheric air is admitted to conduit 43) to the functioning of the pressure control mechanism the valve 101A could, accordingly, be omitted.
  • the reference voltage generator is a sawtooth waveform generator and the control signal generator is operable to generate a bias voltage the level of which varies in response to variations in the said one engine operating parameter, the operating pulse generator being operable to generate an operating pulse when the reference voltage exceeds the bias voltage.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
US46201A 1969-06-27 1970-06-15 Fuel injection systems Expired - Lifetime US3683870A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB45806/69A GB1286851A (en) 1969-06-27 1969-06-27 Fuel injection systems
GB3253169 1969-06-27

Publications (1)

Publication Number Publication Date
US3683870A true US3683870A (en) 1972-08-15

Family

ID=26261433

Family Applications (2)

Application Number Title Priority Date Filing Date
US46201A Expired - Lifetime US3683870A (en) 1969-06-27 1970-06-15 Fuel injection systems
US50257A Expired - Lifetime US3685742A (en) 1969-06-27 1970-06-26 Fuel injection nozzles

Family Applications After (1)

Application Number Title Priority Date Filing Date
US50257A Expired - Lifetime US3685742A (en) 1969-06-27 1970-06-26 Fuel injection nozzles

Country Status (7)

Country Link
US (2) US3683870A (de)
AR (1) AR203981A1 (de)
BE (2) BE752615A (de)
DE (2) DE2030577A1 (de)
FR (2) FR2051386A5 (de)
GB (1) GB1286851A (de)
SE (1) SE362116B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786788A (en) * 1972-05-24 1974-01-22 Nippon Denso Co Fuel injection apparatus for internal combustion engine
DE2342559A1 (de) * 1972-08-24 1974-02-28 Ford Werke Ag Verfahren zur anpassung der brennstoffzufuhr zu einer brennkraftmaschine insbesondere eines kraftfahrzeuges an die angesaugte luftmenge
US3835820A (en) * 1971-06-17 1974-09-17 Nippon Denso Co Fuel injection system for internal combustion engine
US3837321A (en) * 1972-10-07 1974-09-24 Bosch Gmbh Robert Means for indicating the rate of air flow in the intake manifold of an internal combustion engine
US3839997A (en) * 1971-07-21 1974-10-08 Sibe Fuel feed devices for internal combustion engines
US3880125A (en) * 1972-09-21 1975-04-29 Bosch Gmbh Robert Fuel injection system for internal combustion engine
US3916842A (en) * 1970-10-21 1975-11-04 Bosch Gmbh Robert Fuel injection apparatus for internal combustion engines
EP0047174A1 (de) * 1980-09-02 1982-03-10 Chandler Evans Inc. Methode und Apparat zur Brennstoffregelung

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1567041A (en) * 1975-11-06 1980-05-08 Allied Chem Fuel injection system
US4617898A (en) * 1981-07-07 1986-10-21 Piper Fm Limited Fuel delivery to internal combustion engines
IT1155953B (it) * 1982-09-28 1987-01-28 Weber Spa Sistema di iniezione elettronica del combustibile per motori a combustione interna
GB8718732D0 (en) * 1987-08-07 1987-09-16 Lucas Ind Plc Fuel injector
US4951878A (en) * 1987-11-16 1990-08-28 Casey Gary L Pico fuel injector valve
DE10251699A1 (de) * 2002-11-06 2004-06-03 Robert Bosch Gmbh Dosiereinrichtung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644094A (en) * 1949-04-27 1953-06-30 Kellogg M W Co Pulse generator
US2785669A (en) * 1955-06-20 1957-03-19 Acf Ind Inc Injection carburetion
US2948272A (en) * 1956-11-16 1960-08-09 Bendix Aviat Corp Fuel supply system
US3314407A (en) * 1964-09-28 1967-04-18 Holley Carburetor Co Electronic advance for engine ignition systems
US3429302A (en) * 1966-08-24 1969-02-25 Bosch Gmbh Robert Arrangement for controlling the injection of fuel in engines
US3430616A (en) * 1966-11-11 1969-03-04 Bosch Gmbh Robert Fuel injection control system
US3482558A (en) * 1968-01-12 1969-12-09 Acf Ind Inc Fuel injection system
US3543739A (en) * 1967-10-11 1970-12-01 Brev Etudes S I B E De Fuel feed device for an internal combustion engine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1627727A (en) * 1923-01-29 1927-05-10 James A Charter Constant-compression internal-combustion engine
US2388508A (en) * 1944-03-04 1945-11-06 Timpson Lewis G Morris Nozzle
FR1308030A (fr) * 1961-09-21 1962-11-03 Perfectionnement aux pistolets de lavage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644094A (en) * 1949-04-27 1953-06-30 Kellogg M W Co Pulse generator
US2785669A (en) * 1955-06-20 1957-03-19 Acf Ind Inc Injection carburetion
US2948272A (en) * 1956-11-16 1960-08-09 Bendix Aviat Corp Fuel supply system
US3314407A (en) * 1964-09-28 1967-04-18 Holley Carburetor Co Electronic advance for engine ignition systems
US3429302A (en) * 1966-08-24 1969-02-25 Bosch Gmbh Robert Arrangement for controlling the injection of fuel in engines
US3430616A (en) * 1966-11-11 1969-03-04 Bosch Gmbh Robert Fuel injection control system
US3543739A (en) * 1967-10-11 1970-12-01 Brev Etudes S I B E De Fuel feed device for an internal combustion engine
US3482558A (en) * 1968-01-12 1969-12-09 Acf Ind Inc Fuel injection system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916842A (en) * 1970-10-21 1975-11-04 Bosch Gmbh Robert Fuel injection apparatus for internal combustion engines
US3835820A (en) * 1971-06-17 1974-09-17 Nippon Denso Co Fuel injection system for internal combustion engine
US3839997A (en) * 1971-07-21 1974-10-08 Sibe Fuel feed devices for internal combustion engines
US3786788A (en) * 1972-05-24 1974-01-22 Nippon Denso Co Fuel injection apparatus for internal combustion engine
DE2342559A1 (de) * 1972-08-24 1974-02-28 Ford Werke Ag Verfahren zur anpassung der brennstoffzufuhr zu einer brennkraftmaschine insbesondere eines kraftfahrzeuges an die angesaugte luftmenge
US3880125A (en) * 1972-09-21 1975-04-29 Bosch Gmbh Robert Fuel injection system for internal combustion engine
US3837321A (en) * 1972-10-07 1974-09-24 Bosch Gmbh Robert Means for indicating the rate of air flow in the intake manifold of an internal combustion engine
EP0047174A1 (de) * 1980-09-02 1982-03-10 Chandler Evans Inc. Methode und Apparat zur Brennstoffregelung
US4393651A (en) * 1980-09-02 1983-07-19 Chandler Evans Inc. Fuel control method and apparatus

Also Published As

Publication number Publication date
BE752615A (fr) 1970-12-01
FR2051386A5 (de) 1971-04-02
US3685742A (en) 1972-08-22
FR2051385A5 (de) 1971-04-02
SE362116B (de) 1973-11-26
GB1286851A (en) 1972-08-23
DE2030458A1 (de) 1971-01-07
BE752616A (fr) 1970-12-01
AR203981A1 (es) 1975-11-12
DE2030577A1 (de) 1971-01-07

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