US3680532A - Starting fuel feed system for the fuel injection of an internal combustion engine - Google Patents

Starting fuel feed system for the fuel injection of an internal combustion engine Download PDF

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Publication number
US3680532A
US3680532A US10798A US3680532DA US3680532A US 3680532 A US3680532 A US 3680532A US 10798 A US10798 A US 10798A US 3680532D A US3680532D A US 3680532DA US 3680532 A US3680532 A US 3680532A
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Prior art keywords
engine
starting
fuel
temperature
internal combustion
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Expired - Lifetime
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US10798A
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English (en)
Inventor
Norio Omori
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Toyota Motor Corp
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Toyota Motor Corp
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Publication date
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    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for

Definitions

  • ABSTRACT A very useful starting fuel feed system capable of easi- Feb.
  • the present invention relates to a fuel injection internal combustion engine and more particularly to a system adapted to feed the necessary amount of fuel to start, at a temperature below or slightly higher than C, a fuel injection internal combustion engine provided with an electronic control unit for controlling the valve opening time of electrically controlled injection valves mounted in an inlet pipe for the engine in accordance with the duration of an electrical pulse which satisfies the requirements of the engine.
  • the generally employed fuel injection system for starting the engine at low temperatures has consisted of a system wherein the temperature of the engine cylinder wall or the cooling water is detected and electrical pulses having a pulse duration proportional to the detected temperature are successively applied to injection valves from an electronic control unit to ensure the increased amount of fuel supply required for cold starting.
  • the Volkswagen VW 1600 car which is well known as one of the cars that has this kind of fuel injection internal combustion engine installed, employs the aforesaid fuel feed system in which the amount of fuel delivered is controlled by detecting the temperature of the cylinder wall of the engine.
  • the present inventor also conducted a research to develop a novel fuel feed system and obtained fairly good results in terms of good cold starting by developing a fuel feed system wherein the temperature of the engine cylinder wall or the cooling water is detected while a starting motor for the engine is running so that electrical pulses whose pulse duration corresponds to the detected temperature are successively applied to the injection valves from an electronic control unit.
  • It is therefore the object of the present invention to provide a starting fuel feed system for an internal combustion engine comprising electrically controlled injection valves serving as fuel injection valves and an electronic control unit adapted to control the valve opening time of said injection valves by means of electrical pulses whose pulse duration is proportional to the number of revolutions or the load of the engine, characterized in that the temperature conditions of the engine prior to the starting thereof is detected by means of a temperature detector, and that, almost simultaneously only with the actuation of a starting switch or only at the instant a starting motor starts rotating, an electrical pulse having a pulse duration sufficient to satisfy the required quantity of fuel for starting the engine under said temperature conditions is applied to each injection valve.
  • FIG. 1 is a block diagram showing a starting fuel feed system for a fuel injection internal combustion engine according to the present invention.
  • FIG. 2 and FIG. 3 are graphs for explaining the action of the system according to the present invention.
  • numeral 1 designates injection valves mounted in an inlet pipe 3 of an internal combustion engine 2 which are equal in number to the engine cylinders, and the valve 1 is a kind of solenoid valve whose opening time is electrically controlled.
  • Numeral 4 designates a fuel tank; 5 a fuel pump; 6 a fuel distributor; 7 a pressure regulator for maintaining pressure in the fuel lines, which extend from the pump 5 to the pressure regulator 7 itself as well as to the injection valves 1, at a substantially constant pressure value.
  • Numeral 8 designates an engine rpm detector to produce a pulse proportional to the number of revolutions of the engine 2; 9 an inlet pipe internal pressure detector mounted on the inlet pipe 3 of the engine 2.
  • Numeral l0 designates an electronic control unit adapted to mainly receive at the input thereof the electrical outputs from the engine rpm detector 8 and the inlet pipe internal pressure detector 9 to apply to the respective injection valves 1 electrical pulses whose pulse duration is sufficient to supply the amount of fuel that meets the requirement of the engine 2 under such input conditions.
  • Numeral 11 designates a temperature detector to detect the temperature of the engine 2, and in the present embodiment it is composed of a thermistor whose characteristic curve of resistance value R (in ohm) vs. temperature t C) is substantially as shown by a full line in FIG. 2, the detector 11 being mounted at a suitable position to detect the temperature of the engine 2 such as on the cylinder head portion or in the cooling water passages in the radiator.
  • Numeral l2 designates a key switch for starting the engine and its function is to supply power from a power source which is not shown (usually a storage battery installed in a car) to the pump 5, electronic control unit 10, the starting motor which is not shown and a holding circuit 14 through electrical distributing wires 13a, 13b, 13c and 13d shown by the alternate long and two short dashes lines, thus operating these components.
  • the holding circuit 14 is a circuit for producing an electrical pulse whose pulse duration is proportional to the resistance of the temperature detector 11 and it serves to apply an electrical pulse of a suitable duration to the respective injection valves 1 only once upon closure of the said key switch 12 and independently of those electrical pulses whose pulse duration is controlled by the electronic control unit 10 when the engine 2 is rotating.
  • the timing at which an electrical pulse is applied to each injection valve 1 from the holding circuit 14 through the electronic control unit 10 may be selected to coincide with the timing of the starting motor to start rotation. It is important to ensure that, in starting the engine, an electrical pulse having a suitable duration to feed the necessary amount of fuel for starting the engine is applied only once to each of the injection valves 1 when the key switch 12 is closed. Then, once the engine is started, the electronic control unit 10 applies to each injection valve 1 electrical pulses having a pulse duration which supplies the necessary amount of fuel to maintain the continued smooth operation of the engine under the existing temperature conditions thereof. If the engine fails to start in the said manner, the key switch 12 may be actuated again so that an electrical pulse will be reapplied to each of the injection valves 1 from the holding circuit 14 through the electronic control unit 10.
  • FIG. 3 shows a pulse duration characteristic of an electrical pulse applied to each of the injection valves from the holding circuit 14 when a good starting characteristic is attained by the system of the present invention in an internal combustion engine whose displacement is 2,000 cc.
  • the vertical coordinate represents the pulse duration T (msec.) of the electrical pulse and the horizontal coordinate represents the temperature t C) of the engine cylinder head.
  • a starting fuel feed system for an internal combustion engine having an engine starting motor come l rically controlled fuel injection valves for said engine,
  • means including an electronic control unit connected to said valves for delivering thereto during engine running time electrical pulses whose pulse duration is responsive to the number of engine revolutions and load,
  • said starting pulse duration means for automatically causing said starting pulse duration to occur only once for each start of said starting motor regardless of how long that motor is operated and to start substantially at the time that motor starts for satisfying the quantity of fuel required to start the said engine at the detected I temperature.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
US10798A 1969-02-15 1970-02-12 Starting fuel feed system for the fuel injection of an internal combustion engine Expired - Lifetime US3680532A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1140169 1969-02-15

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US3680532A true US3680532A (en) 1972-08-01

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US (1) US3680532A (https=)
FR (1) FR2037379A5 (https=)
GB (1) GB1280052A (https=)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3812830A (en) * 1971-09-10 1974-05-28 Sopromi Soc Proc Modern Inject Electronic fuel injection control devices for internal combustion motors
US3847130A (en) * 1971-08-23 1974-11-12 Nippon Denso Co Electrical fuel injection system for internal combustion engines
US3923031A (en) * 1974-11-25 1975-12-02 Bendix Corp System for reordering the fuel injection sequence to facilitate starting of an internal combustion engine
FR2304783A1 (fr) * 1975-03-19 1976-10-15 Bosch Gmbh Robert Procede et dispositif pour faciliter le demarrage a froid d'installations d'injection de carburant
US3991726A (en) * 1974-01-26 1976-11-16 Nippondenso Co., Ltd. Electronically controlled fuel injection system
US4128082A (en) * 1977-03-18 1978-12-05 Toyota Jidosha Kogyo Kabushiki Kaisha Electronic fuel injection control device
US4205635A (en) * 1976-03-26 1980-06-03 Robert Bosch Gmbh Fuel mixture control system
FR2443579A1 (fr) * 1978-12-06 1980-07-04 Nissan Motor Dispositif de commande d'injection de carburant utilisable avec un moteur a combustion interne
US4231333A (en) * 1978-01-12 1980-11-04 Arthur K. Thatcher Single point fuel dispersion system using a low profile carburetor
US4411234A (en) * 1980-11-17 1983-10-25 Advanced Fuel Systems Fuel system for internal combustion engine
US4519355A (en) * 1984-04-24 1985-05-28 Toyota Jidosha Kabushiki Kaisha Method of control of internal combustion engine variable swirl air-fuel intake system with direct and helical intake passages
US4523461A (en) * 1983-05-02 1985-06-18 Air Sensors, Inc. Hot wire anemometer
US4604895A (en) * 1983-05-02 1986-08-12 Air Sensor Inc. Hot wire anemometer
US5179923A (en) * 1989-06-30 1993-01-19 Tonen Corporation Fuel supply control method and ultrasonic atomizer
US20100246083A1 (en) * 2007-12-03 2010-09-30 Makoto Shibuya Method for controlling electric compressor

Families Citing this family (1)

* 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

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1156103A (fr) * 1955-08-29 1958-05-13 Daimler Benz Ag Dispositif de démarrage pour moteurs à combustion interne
US3032025A (en) * 1959-07-14 1962-05-01 Bendix Corp Fuel supply system
US3311102A (en) * 1964-11-10 1967-03-28 Bosch Arma Corp Excess fuel starting device for fuel injection engines
US3463130A (en) * 1966-11-03 1969-08-26 Bosch Gmbh Robert Fuel injection control system
US3504657A (en) * 1967-05-24 1970-04-07 Bosch Gmbh Robert System for enriching the fuel mixture on cold starts in an electrically controlled injection system for an internal combustion engine
US3533381A (en) * 1968-05-24 1970-10-13 Bosch Gmbh Robert Temperature sensitive control circuit for internal combustion engines having a fuel injection system
US3616784A (en) * 1970-07-17 1971-11-02 Gen Motors Corp Fuel supply system for an internal combustion engine providing time and voltage compensated cranking enrichment
US3628510A (en) * 1970-06-10 1971-12-21 Gen Motors Corp Fuel supply system for an internal combustion engine providing timed cranking enrichment

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1156103A (fr) * 1955-08-29 1958-05-13 Daimler Benz Ag Dispositif de démarrage pour moteurs à combustion interne
US3032025A (en) * 1959-07-14 1962-05-01 Bendix Corp Fuel supply system
US3311102A (en) * 1964-11-10 1967-03-28 Bosch Arma Corp Excess fuel starting device for fuel injection engines
US3463130A (en) * 1966-11-03 1969-08-26 Bosch Gmbh Robert Fuel injection control system
US3504657A (en) * 1967-05-24 1970-04-07 Bosch Gmbh Robert System for enriching the fuel mixture on cold starts in an electrically controlled injection system for an internal combustion engine
US3533381A (en) * 1968-05-24 1970-10-13 Bosch Gmbh Robert Temperature sensitive control circuit for internal combustion engines having a fuel injection system
US3628510A (en) * 1970-06-10 1971-12-21 Gen Motors Corp Fuel supply system for an internal combustion engine providing timed cranking enrichment
US3616784A (en) * 1970-07-17 1971-11-02 Gen Motors Corp Fuel supply system for an internal combustion engine providing time and voltage compensated cranking enrichment

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847130A (en) * 1971-08-23 1974-11-12 Nippon Denso Co Electrical fuel injection system for internal combustion engines
US3812830A (en) * 1971-09-10 1974-05-28 Sopromi Soc Proc Modern Inject Electronic fuel injection control devices for internal combustion motors
US3991726A (en) * 1974-01-26 1976-11-16 Nippondenso Co., Ltd. Electronically controlled fuel injection system
US3923031A (en) * 1974-11-25 1975-12-02 Bendix Corp System for reordering the fuel injection sequence to facilitate starting of an internal combustion engine
FR2304783A1 (fr) * 1975-03-19 1976-10-15 Bosch Gmbh Robert Procede et dispositif pour faciliter le demarrage a froid d'installations d'injection de carburant
US4205635A (en) * 1976-03-26 1980-06-03 Robert Bosch Gmbh Fuel mixture control system
US4128082A (en) * 1977-03-18 1978-12-05 Toyota Jidosha Kogyo Kabushiki Kaisha Electronic fuel injection control device
US4231333A (en) * 1978-01-12 1980-11-04 Arthur K. Thatcher Single point fuel dispersion system using a low profile carburetor
US4459670A (en) * 1978-06-12 1984-07-10 Nissan Motor Company, Limited Fuel injection control device for use with an internal combustion engine
FR2443579A1 (fr) * 1978-12-06 1980-07-04 Nissan Motor Dispositif de commande d'injection de carburant utilisable avec un moteur a combustion interne
US4411234A (en) * 1980-11-17 1983-10-25 Advanced Fuel Systems Fuel system for internal combustion engine
US4523461A (en) * 1983-05-02 1985-06-18 Air Sensors, Inc. Hot wire anemometer
US4604895A (en) * 1983-05-02 1986-08-12 Air Sensor Inc. Hot wire anemometer
US4519355A (en) * 1984-04-24 1985-05-28 Toyota Jidosha Kabushiki Kaisha Method of control of internal combustion engine variable swirl air-fuel intake system with direct and helical intake passages
DE3435170A1 (de) * 1984-04-24 1985-10-31 Toyota Jidosha K.K., Toyota, Aichi Verfahren zur steuerung eines luft-kraftstoff-ansaugsystems mit veraenderlichem drall und mit einem geraden sowie schraubenfoermigen ansaugkanal fuer eine brennkraftmaschine
US5179923A (en) * 1989-06-30 1993-01-19 Tonen Corporation Fuel supply control method and ultrasonic atomizer
US20100246083A1 (en) * 2007-12-03 2010-09-30 Makoto Shibuya Method for controlling electric compressor

Also Published As

Publication number Publication date
DE2006420A1 (de) 1970-09-24
DE2006420B2 (de) 1972-08-24
FR2037379A5 (https=) 1970-12-31
GB1280052A (en) 1972-07-05

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