US3463130A - Fuel injection control system - Google Patents

Fuel injection control system Download PDF

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Publication number
US3463130A
US3463130A US677566A US3463130DA US3463130A US 3463130 A US3463130 A US 3463130A US 677566 A US677566 A US 677566A US 3463130D A US3463130D A US 3463130DA US 3463130 A US3463130 A US 3463130A
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United States
Prior art keywords
engine
transistor
circuit
fuel
multivibrator
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Expired - Lifetime
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US677566A
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English (en)
Inventor
Wolfgang Reichardt
Dieter Eichler
Hermann Scholl
Josef Wahl
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of US3463130A publication Critical patent/US3463130A/en
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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
    • F02D41/30—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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off

Definitions

  • the present invention relates to a fuel injection system for internal combustion engines and more particularly to a control system to control electromagnetically operated injection valves in dependence on operating parameters of the internal combustion engine.
  • Fuel injection systems for internal combustion engines have the advantage that good combustion of the fuel can be obtained and thus the energy of the fuel can be utilized efiiciently. Further, the proportion of noxious gases in the exhaust, such as carbon monoxide, can be reduced. The content of noxious gases is particularly increased when the internal combustion engine need not produce power, for example, when it is idling, during braking of the vehicle, or during coasting, for example, downhill. Additionally, if the engine is not required to deliver power, fuel supplied thereto in excess of its idling requirements is wasted, thus decreasing the economy of operation of the engine.
  • an electronic circuit supplies impulses to electromagnetically operated fuel injection valves, timed in dependence on the speed of the engine.
  • the length of the impulses depends on operating parameters of the engine and is controlled by a sensing device sensing the vacuum in the intake manifold, as determined by the throttle position controlling the engine.
  • a blocking circuit is provided to disable application of fuel injection impulses by the electronic circuit to the fuel injection valves upon the occurrence of conditions when no fuel should be supplied.
  • the blocking circuit is interconnected with the engine controller, that is, the gas pedal, and is further responsive to the speed of the engine, so that, when the engine speed is in excess of a certain predetermined value and the engine controller is set so that the throttle is closed, or almost closed, the blocking circuit will prevent application of fuel injection impulses to the fuel injection valves.
  • the operation of the blocking circuit can be readily controlled.
  • the blocking circuit is disabled at low temperatures in order to prevent stalling of the engine when it is still cold.
  • the drawing illustrates a four cylinder internal combustion engine 10, having spark plugs 11, connected to a high tension source not illustrated.
  • Electromagnetically operated injection valves 13 are located in the individual cylinder branches connected to an intake manifold 12 and located in immediate vicinity of the inlet valves (not shown) of the internal combustion engine 10.
  • the four injection valves 13 together form fuel injection means for the internal combustion engine 10. Fuel is supplied to each valve 13 under constant pressure from a fuel supply over lines 14.
  • the coils 13 of the fuel injection valves 13 are combined in two groups which are alternately operated. As shown, the two left valves are the two right valves (referring to the figure) each form one group. For operation, two windings 13' are respectively connected over resistances 15 to the collector of an npn power transistor 16, 17, respectively. When transistor 16 or 17, respectively, is conductive then the valves 13 connected thereto are opened so that the fuel is injected to the respective cylinders, the amount being proportional to the opening time of the valves 13.
  • valves 13 The opening time of valves 13 depends on the operating parameters of the engine 10.
  • a monostable multivibrator 18 provides pulses in synchronism with the speed of the engine, as determined by the closing of a switch 20, operated by a double-rise cam 21, and driven from the engine camshaft as indicated by the broken line in schematic form.
  • the contacts of switch 20 will thus close twice during each rotation of the camshaft of the engine and serve as a pulse source.
  • the multivibrator 18 serves as an electronic control device and contains a timing circuit such as a R-C, or a L-R circuit which determines the impulse duration of the multi vibrator.
  • the impulse period is increased and more fuel is injected.
  • the output pulses of the multivibrator 18 are connected over a transfer switch 24 to a pair of AND gates 25, 26 each containing a transistor 27, 28.
  • the transfer switch 24 is likewise controlled from the camshaft of the engine 10.
  • the emitters of the transistors 27, 28 are connected to the chassis and thereover with the negative terminal of a source of DC potential, for example, an automotive battery of 12. volts.
  • the emitter of the output transistors 16, 17 are connected together and to the anode of a rectifier 29, the cathode of which is likewise connected to the chassis. This rectifier provides the bias for the bases of transistors 16 and 17.
  • the collector of the transistor 27 is directly connected with the base of a transistor 16 and further over a resistance 32 to a positive polarity bus 33, connected to the positive terminal of the battery.
  • the collector of transistor 28 is similarly connected with the base of the transistor 17 and over a resistance 34 again to the positive bus 33.
  • the collectors of transistors 16 and 17 are connected over a pair of parallel connected series circuits comprising a resistance and the winding 13' of the injection valves 13 to the positive bus 33.
  • the base of the transistor 27 is connected over a resistance 35 to the upper fixed contact of the transfer switch 24 and over a resistance 36 to the output of a bistable multivibrator 38.
  • the base of transistor 28 is likewise connected over a resistance 41 to the multivibrator 38.
  • the base of transistor 28 is further connected over a resistance 42 with the lower fixed contact of transfer switch 24.
  • a movable contact of transfer switch 24 is connected to the output of the multivibrator 18.
  • the input of multivibrator 18 is connected over resistance 43 with the positive bus 33. Further, the input of multivibrator 18 is connected to one terminal of the interruptor switch 20, the other terminal of which is connected with the chassis or ground.
  • the output of the bistable multivibrator 38 to which the resistance 36 and 41 are connected, is at chassis potential. Under these conditions, the multivibrator 38 permits operation of the injection system. If a negative impulse is obtained from multivibrator 18, conducted over transfer switch 24 to transistor 27, then this previously conductive transistor is blocked. Its collector becomes more positive, and power transistor 16 becomes conductive so that fuel for the two left cylinders of the motor 10 can be injected. 1f the transfer switch 24, at the next pulse, is in its lower position, then the right transistor 28 is blocked, power transistor 17 becomes conductive so that during the impulse period fuel is injected for the two right cylinders of motor 10.
  • the multivibrator 38 serving as a blocking circuit includes two npn transistors 45, 46, having their emitters directly connected to the chassis.
  • the base of transistor 45 is connected over a resistance 47 to the chassis.
  • a resistance 48 further connects the base of transistor 45 to the collector of a transistor 46, which serves as the output for the multivibrator 38, and to which the resistances 36, 41 are connected.
  • the collector of transistor 46 is further connected over a collector resistance 49 to the positive bus 33.
  • the base of transistor 45 is connected further with the anode of a diode 52, the cathode of which connects to a junction 53.
  • Junction 53 connects to the cathode of a diode 54, one electrode of a condenser 55, and to a resistance 56 connected at its other end to chassis.
  • the cathode of a diode 57 and the anode of the diode 54 are interconnected, and both in turn connect to a condenser 59, the other terminal of which is connected to the input to multivibrator 18 and hence to one terminal of interruptor contact 20.
  • the anode of diode 57 and the other electrode of condenser 55 connect over a resistance 58 to chassis.
  • the elements 52 to 59 together form a first passive network.
  • the input to multivibrator 18, and hence one contact of interruptor switch 20, further has a resistance 62 connected thereto, the other terminal of which is connected with one electrode of a condenser 63, the cathode of a diode 64 and series-connected resistances, 65, 66, which connect back to the anode of diode 64.
  • a condenser 67 connects the anode of diode 64 to the chassis.
  • a resistance 68 connects the anode of diode 64 to the other electrode of condenser 63 and to the cathode of a diode 69.
  • the circuit elements 62. to 68 together form a second passive network.
  • the anode of diode 69 connects to a junction 76 and to the base of transistor 46.
  • the base is further connected over resistance 78 to the chassis.
  • the collector of transistor 45 is connected over a collector resistance 83 with the positive bus 33 and over a resistance 84 with junction 76.
  • the cathode of a diode 70 further connects to the junction 76.
  • the anode of cathode 70 is connected over a resistance 88 to the positive bus 33, and further, to a bi-metallic switch 85 which is connected in heat conductive relationship to the motor 10 and closes only when the motor has reached operating temperature.
  • Switch 85 thus serves as a circuit element dependent on the temperature of the engine 10.
  • a switch 86 connects bimetallic switch 85 to the chassis. Switch 86 is only closed when the throttle 23 is closed, or almost closed.
  • the drawing illustrates an operative connection between the gas pedal and the switch 86, which gas pedal of course controls the throttle 23 through linkages not shown in the drawing. Thus, switch 86 will be closed only when the fuel control commands operation of the motor in or near idling.
  • bistable multivibrator and the cooperating circuit components operate as follows: If one of the switches 86 or 85 are open, diode 70 will be conductive. Current can flow to the base of transistor 46 which is kept conductive. The collector of transistor 46, to which the resistances 36 and 41 are connected, is thus at the chassis potential and the injection control system operates, as above described, since the AND circuits 25, 26 pass the impulses coming from multivibrator 18.
  • the switching condition of the bistable multivibrator 38 thus depends on the frequency of the impulses which are applied from the pulse switch 20, and thus depends on the speed of the engine 10.
  • the first passive network consisting of elements 52 to 59 is so dimensioned that below a lower limit of, for example, 1,100 r.p.m., negative impulses are passed to the base of transistor 45, thus blocking this transistor and causing conduction of transistor 46 over resistance 84.
  • the injection system thus operates normally and as above described.
  • the second passive network consisting of circuit components 62 to 68, passes negative impulses above an upper speed limit, for example, 1,800 r.p.m., to the base of transistor 46, thus blocking this transistor and controlling transistor 45, over resistance 48, to be conductive.
  • the collector of transistor 46 will be at the potential of the positive bus 33 so that over resistance 36 current will be applied to the base of transistor 27 and, over resistance 41, current will be applied to the base of transistor 28.
  • Transistors 27 and 28 thus both become conductive, block transistors 16 and 17, and thus block application of current to the coils 13 of the injection valves 13.
  • switch 85 permits injection of fuel regardless of speed.
  • injection of fuel is enabled after the throttle 23 has passed a certain minimum opening, that is, has reached a position at which switch 86 is open.
  • Diode 69 and diode 70 connected to junction 76, together form an AND gate generally indicated at 71 to block transistor 46 upon concurrence of the following conditions: speed above 1,800 r.p.m. and temperature above minimum and throttle closed.
  • a blocking circuit 38
  • said blocking circuit having its input connected to said settable control means position sensing means (86) and to said engine speed sensing means (20, 21) and having its output (46) connected to said electric circuit means, said blocking circuit having means (69, 70) sensing the logical conjunction of (a) closed or almost closed throttle position, and (b) engine speed in excess of a predetermined value, said blocking circuit inhibiting supply of pulses from said electrical circuit means to said fuel injection means upon said sensed logical conjunction.
  • System as claimed in claim 1 including a temperature-sensitive switching element dependent on the temperature of the engine and connected to said blocking circuit and controlling the state thereof; to disable said blocking circuit at temperature levels below a predetermined value.
  • said means sensing closed, or almost closed position of said operator settable control means (87) comprises a switch (86) arranged to change state when the operator settable control means just reaches a position corresponding to closed throttle, said switch controlling the state of said blocking circuit (38).
  • System as claimed in claim 3 including a temperature sensitive switch dependent on the temperature of the engine and connected to control the state of said blocking circuit, said temperature sensitive switch being connected in circuit with said engine controller switch (86) and overriding blocking action of said blocking circuit at temperatures below a predetermined value regardless of the position of the operator settable control means.
  • said blocking circuit (38) includes a double input multivibrator circuit, said circuit having a blocking state and an unblocked state;
  • said engine speed sensing means includes a pulse source (20) supplying speed pulses in synchronism with engine speed; a first passive network (52-59) having said speed pulses applied thereto is connected to one input of said multivibrator circuit to control said multivibrator circuit to switch to unblocked state when the speed of the engine is below a predetermined value; a second passive network (62, 68) having said speed pulses applied thereto is provided; a switching element controlled by the position of said engine controller; and means interconnecting said second passive network (62- 68) and said switching element (86) and connected to the other input of said multivibrator circuit to control said multivibrator to switch into blocked state when (a) said switching element is in a position corresponding to closed, or almost closed state of the throttle of the engine as determined by said operator settable control means (87) and (b)
  • System as claimed in claim 5 including a temperature sensitive switching element dependent on the temperature of the engine and in circuit with the second input to said multivibrator circuit, said temperature sensitive switching element being connected to enable said multivibrator circuit only if the temperature is above a predetermined value.
  • said electrical circuit means supplying pulses to said valves (13) includes an AND gate (25-, 26); and an electronic control circuit (18, 24) to control application of injection pulses to said valves is provided; one input of said AND gates being connected to said electronic control circuit and the other input of said AND gates being connected to said blocking circuit (38).

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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)
US677566A 1966-11-03 1967-10-24 Fuel injection control system Expired - Lifetime US3463130A (en)

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Application Number Priority Date Filing Date Title
DEB0089669 1966-11-03

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US3463130A true US3463130A (en) 1969-08-26

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US (1) US3463130A (da)
JP (1) JPS542339B1 (da)
AT (1) AT284549B (da)
BE (1) BE706058A (da)
CH (1) CH459661A (da)
DE (1) DE1526503B1 (da)
DK (1) DK129364B (da)
ES (1) ES346729A1 (da)
FR (1) FR1543051A (da)
GB (1) GB1133550A (da)
NL (1) NL6714906A (da)
SE (1) SE334262B (da)

Cited By (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3570460A (en) * 1968-09-21 1971-03-16 Bosch Gmbh Robert Control system for blocking fuel injection in an internal combustion engine
US3581839A (en) * 1969-01-10 1971-06-01 Bendix Corp Exhaust pollution control circuit
US3596640A (en) * 1968-04-05 1971-08-03 Brico Eng Fuel injection systems for internal combustion engines
US3612013A (en) * 1969-11-24 1971-10-12 Gen Motors Corp Fuel supply control system for an internal combustion engine
DE2014633A1 (de) * 1970-03-26 1971-10-14 Robert Bosch Gmbh, 7000 Stuttgart Elektronisches Gemischdosierungs system
US3626912A (en) * 1969-03-28 1971-12-14 Fernand Grosclaude Device for regulating the supply of carburant to an internal combustion engine
US3636931A (en) * 1968-04-17 1972-01-25 Hitachi Ltd Fuel injection controlling system for internal combustion engine
US3659565A (en) * 1968-05-06 1972-05-02 Hitachi Ltd Fuel injection controlling system for internal combustion engine
US3664148A (en) * 1970-01-13 1972-05-23 Nippon Denso Co Cooler control system for automobile coolers
US3670706A (en) * 1969-08-20 1972-06-20 Nippon Denso Co Fuel injection control system for internal combustion engines
US3680532A (en) * 1969-02-15 1972-08-01 Toyota Motor Co Ltd Starting fuel feed system for the fuel injection of an internal combustion engine
US3683869A (en) * 1969-02-03 1972-08-15 Nippon Denso Co Fuel injection control system for internal combustion engines
US3699932A (en) * 1969-10-22 1972-10-24 Shigeo Aono Electronically controlled fuel injection system
US3703162A (en) * 1969-10-22 1972-11-21 Nissan Motor Fuel shutoff device for internal combustion engine
US3710587A (en) * 1969-12-13 1973-01-16 Y Hayashi Control system for a vehicle air-conditioner
US3727591A (en) * 1969-10-24 1973-04-17 Hitachi Ltd Fuel supply control system for internal combustion engines
US3731659A (en) * 1971-09-07 1973-05-08 Gen Motors Corp Electronic fuel injection system having deceleration fuel control
US3735742A (en) * 1969-10-22 1973-05-29 Nissan Motor Engine overrun preventing device for internal combustion engine
US3736910A (en) * 1970-07-14 1973-06-05 Bosch Gmbh Robert Control circuit for controlling a fuel injecting system
US3742920A (en) * 1971-09-27 1973-07-03 Brico Eng Fuel injection systems
US3809028A (en) * 1971-09-27 1974-05-07 Bendix Corp Fuel cutoff circuit responsive to engine deceleration conditions for use in conjunction with the fuel delivery system for an internal combustion engine
US3854458A (en) * 1970-10-15 1974-12-17 Bendix Corp Fuel injection control system
US3866584A (en) * 1970-11-03 1975-02-18 Volkswagenwerk Ag Switching device and circuit
US3872850A (en) * 1969-02-04 1975-03-25 Lucas Industries Ltd Fuel injection systems
US3906909A (en) * 1970-10-24 1975-09-23 Alfa Romeo Spa Internal combustion engine of the fuel injection type having means for reducing the emission of unburned products with the exhaust gases
US3919885A (en) * 1972-03-24 1975-11-18 Harbeke Gerold J Apparatus for dynamically analyzing an electronic fuel injection system and the associated engine parts
US3943892A (en) * 1973-11-16 1976-03-16 Holec N.V. Injector
US3980058A (en) * 1973-03-28 1976-09-14 Nissan Motor Co., Ltd. Fuel feed control system of internal combustion engine
US4007590A (en) * 1974-06-01 1977-02-15 Nissan Motor Co., Ltd. Catalytic convertor warming up system
DE2738886A1 (de) * 1977-08-29 1979-03-15 Bosch Gmbh Robert Verfahren und einrichtung zur steuerung des betriebsverhaltens einer brennkraftmaschine mit fremdzuendung beim beginn, im und nach dem schubbetrieb
FR2414629A1 (fr) * 1978-01-17 1979-08-10 Bosch Gmbh Robert Procede et dispositif pour commander l'alimentation en carburant d'un moteur a combustion interne
DE2917888A1 (de) * 1978-05-04 1979-11-08 Nippon Denso Co Verfahren zum steuern der arbeitsweise einer brennkraftmaschine
US4173953A (en) * 1977-02-02 1979-11-13 Robert Bosch Gmbh Fuel injection pulse suppressor apparatus
US4174681A (en) * 1977-07-18 1979-11-20 The Bendix Corporation Two-group/simultaneous full injection conversion system for multiple cylinder engines
FR2449202A1 (fr) * 1979-02-16 1980-09-12 Nissan Motor Systeme d'alimentation en carburant avec possibilite d'interruption
DE3027297A1 (de) * 1979-07-19 1981-02-12 Nissan Motor Regelsystem fuer die kraftstoffzufuehrung eines verbrennungsmotors
US4274382A (en) * 1978-05-12 1981-06-23 Nissan Motor Company, Limited Apparatus for performing stepwise reactivation of cylinders of an internal combustion engine upon deceleration
US4276863A (en) * 1978-05-12 1981-07-07 Nissan Motor Company, Limited Apparatus for controlling the number of enabled cylinders of an internal combustion engine upon deceleration
US4297977A (en) * 1979-01-19 1981-11-03 Kokusan Denki Co., Ltd. Ignition system for an internal combustion engine
US4322947A (en) * 1977-06-23 1982-04-06 Robert Bosch Gmbh Control apparatus for a fuel supply system for mixture-compressing, externally ignited internal combustion engines
US4328697A (en) * 1979-05-23 1982-05-11 Lucas Industries Limited Transducer calibration device
US4387687A (en) * 1979-12-05 1983-06-14 Robert Bosch Gmbh Control apparatus for a fuel metering system in an internal combustion engine
US4440127A (en) * 1982-03-23 1984-04-03 Robert Bosch Gmbh Electronic control device for the fuel metering system of an internal combustion engine
EP0219843A3 (en) * 1985-10-21 1987-08-26 Hitachi, Ltd. Method and system for idle speed control
US5313922A (en) * 1989-12-23 1994-05-24 Robert Bosch Gmbh Method for controlling a flow of fuel to an engine of a vehicle during overrun operation

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
US3914619A (en) * 1975-01-08 1975-10-21 Ford Motor Co Frequency responsive switching circuit
DE3942862C2 (de) * 1989-12-23 2001-04-12 Bosch Gmbh Robert Verfahren zur Motorschleppmomentbegrenzung
CN106018996B (zh) * 2016-05-10 2017-07-18 中国人民解放军第五七二一工厂 一种飞行器加油、输油活门试验装置
DE102018211338A1 (de) * 2018-07-10 2020-01-16 Robert Bosch Gmbh Kraftstofffördereinrichtung für kryogene Kraftstoffe und Verfahren zum Betreiben einer Kraftstofffördereinrichtung

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US2948272A (en) * 1956-11-16 1960-08-09 Bendix Aviat Corp Fuel supply system
US3005447A (en) * 1959-10-07 1961-10-24 Bosch Gmbh Robert Fuel injection arrangement for internal combustion engines
US3032025A (en) * 1959-07-14 1962-05-01 Bendix Corp Fuel supply system

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GB880072A (en) * 1957-11-30 1961-10-18 Weselco Ltd Apparatus for controlling the injection of fluid into internal combustion engines
DE1886341U (de) * 1961-03-08 1964-01-23 E H Friedrich Dr Ing Nallinger Einrichtung fuer den schiebebetrieb von durch einen zweitaktmotor angetriebenen kraftfahrzeugen.

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US2948272A (en) * 1956-11-16 1960-08-09 Bendix Aviat Corp Fuel supply system
US3032025A (en) * 1959-07-14 1962-05-01 Bendix Corp Fuel supply system
US3005447A (en) * 1959-10-07 1961-10-24 Bosch Gmbh Robert Fuel injection arrangement for internal combustion engines

Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3596640A (en) * 1968-04-05 1971-08-03 Brico Eng Fuel injection systems for internal combustion engines
US3636931A (en) * 1968-04-17 1972-01-25 Hitachi Ltd Fuel injection controlling system for internal combustion engine
US3659565A (en) * 1968-05-06 1972-05-02 Hitachi Ltd Fuel injection controlling system for internal combustion engine
US3570460A (en) * 1968-09-21 1971-03-16 Bosch Gmbh Robert Control system for blocking fuel injection in an internal combustion engine
US3581839A (en) * 1969-01-10 1971-06-01 Bendix Corp Exhaust pollution control circuit
US3683869A (en) * 1969-02-03 1972-08-15 Nippon Denso Co Fuel injection control system for internal combustion engines
US3872850A (en) * 1969-02-04 1975-03-25 Lucas Industries Ltd Fuel injection systems
US3680532A (en) * 1969-02-15 1972-08-01 Toyota Motor Co Ltd Starting fuel feed system for the fuel injection of an internal combustion engine
US3626912A (en) * 1969-03-28 1971-12-14 Fernand Grosclaude Device for regulating the supply of carburant to an internal combustion engine
US3670706A (en) * 1969-08-20 1972-06-20 Nippon Denso Co Fuel injection control system for internal combustion engines
US3699932A (en) * 1969-10-22 1972-10-24 Shigeo Aono Electronically controlled fuel injection system
US3703162A (en) * 1969-10-22 1972-11-21 Nissan Motor Fuel shutoff device for internal combustion engine
US3735742A (en) * 1969-10-22 1973-05-29 Nissan Motor Engine overrun preventing device for internal combustion engine
US3727591A (en) * 1969-10-24 1973-04-17 Hitachi Ltd Fuel supply control system for internal combustion engines
US3612013A (en) * 1969-11-24 1971-10-12 Gen Motors Corp Fuel supply control system for an internal combustion engine
US3710587A (en) * 1969-12-13 1973-01-16 Y Hayashi Control system for a vehicle air-conditioner
US3664148A (en) * 1970-01-13 1972-05-23 Nippon Denso Co Cooler control system for automobile coolers
DE2014633A1 (de) * 1970-03-26 1971-10-14 Robert Bosch Gmbh, 7000 Stuttgart Elektronisches Gemischdosierungs system
US3736910A (en) * 1970-07-14 1973-06-05 Bosch Gmbh Robert Control circuit for controlling a fuel injecting system
US3854458A (en) * 1970-10-15 1974-12-17 Bendix Corp Fuel injection control system
US3906909A (en) * 1970-10-24 1975-09-23 Alfa Romeo Spa Internal combustion engine of the fuel injection type having means for reducing the emission of unburned products with the exhaust gases
US3866584A (en) * 1970-11-03 1975-02-18 Volkswagenwerk Ag Switching device and circuit
US3731659A (en) * 1971-09-07 1973-05-08 Gen Motors Corp Electronic fuel injection system having deceleration fuel control
US3742920A (en) * 1971-09-27 1973-07-03 Brico Eng Fuel injection systems
US3809028A (en) * 1971-09-27 1974-05-07 Bendix Corp Fuel cutoff circuit responsive to engine deceleration conditions for use in conjunction with the fuel delivery system for an internal combustion engine
US3919885A (en) * 1972-03-24 1975-11-18 Harbeke Gerold J Apparatus for dynamically analyzing an electronic fuel injection system and the associated engine parts
US3980058A (en) * 1973-03-28 1976-09-14 Nissan Motor Co., Ltd. Fuel feed control system of internal combustion engine
US3943892A (en) * 1973-11-16 1976-03-16 Holec N.V. Injector
US4007590A (en) * 1974-06-01 1977-02-15 Nissan Motor Co., Ltd. Catalytic convertor warming up system
US4173953A (en) * 1977-02-02 1979-11-13 Robert Bosch Gmbh Fuel injection pulse suppressor apparatus
US4322947A (en) * 1977-06-23 1982-04-06 Robert Bosch Gmbh Control apparatus for a fuel supply system for mixture-compressing, externally ignited internal combustion engines
US4174681A (en) * 1977-07-18 1979-11-20 The Bendix Corporation Two-group/simultaneous full injection conversion system for multiple cylinder engines
DE2738886A1 (de) * 1977-08-29 1979-03-15 Bosch Gmbh Robert Verfahren und einrichtung zur steuerung des betriebsverhaltens einer brennkraftmaschine mit fremdzuendung beim beginn, im und nach dem schubbetrieb
FR2414629A1 (fr) * 1978-01-17 1979-08-10 Bosch Gmbh Robert Procede et dispositif pour commander l'alimentation en carburant d'un moteur a combustion interne
DE2917888A1 (de) * 1978-05-04 1979-11-08 Nippon Denso Co Verfahren zum steuern der arbeitsweise einer brennkraftmaschine
US4274382A (en) * 1978-05-12 1981-06-23 Nissan Motor Company, Limited Apparatus for performing stepwise reactivation of cylinders of an internal combustion engine upon deceleration
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Also Published As

Publication number Publication date
GB1133550A (en) 1968-11-13
CH459661A (de) 1968-07-15
ES346729A1 (es) 1968-12-16
NL6714906A (da) 1968-05-06
DK129364C (da) 1975-02-17
SE334262B (da) 1971-04-19
DE1526503B1 (de) 1971-03-04
JPS542339B1 (da) 1979-02-06
FR1543051A (fr) 1968-10-18
BE706058A (da) 1968-03-18
AT284549B (de) 1970-09-25
DK129364B (da) 1974-09-30

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