US3812830A - Electronic fuel injection control devices for internal combustion motors - Google Patents

Electronic fuel injection control devices for internal combustion motors Download PDF

Info

Publication number
US3812830A
US3812830A US00284614A US28461472A US3812830A US 3812830 A US3812830 A US 3812830A US 00284614 A US00284614 A US 00284614A US 28461472 A US28461472 A US 28461472A US 3812830 A US3812830 A US 3812830A
Authority
US
United States
Prior art keywords
injection
motor
control
transistor
signal
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
US00284614A
Other languages
English (en)
Inventor
P Traisnel
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.)
Societe des Procedes Modernes dInjection SOPROMI
Original Assignee
Societe des Procedes Modernes dInjection SOPROMI
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 Societe des Procedes Modernes dInjection SOPROMI filed Critical Societe des Procedes Modernes dInjection SOPROMI
Application granted granted Critical
Publication of US3812830A publication Critical patent/US3812830A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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

Definitions

  • It relates, more particularly, to devices designed to produce a pre-injection of fuel before or during the time the starter is actuated, before the normal injections are triggered by the rotation of the motor, which are called normal injections, and an increase in the quantity of fuel injected at the time of each injection, called supplementary injections, in order to facilitate starting under cold conditions.
  • lt is the purpose of the present invention to meet these requirements while avoiding the drawbacks of the prior art solutions mentioned above. Accordingly, its object is improvements in electronically controlled fuel injection devices for internal combustion motors, characterized by the fact that a first electronic control circuit is provided, connected to the starter contact to operate, before and/or during the starting of the motor, to cause a pre-injection ofa certain length. A second control circuit is provided, connected to the starter contact and to the circuit computing the durations of the normal injections, to cause one or more supplementary fuel injections immediately following the corresponding normal injection as long as the starter contact is closed.
  • the pre-injection can be embodied, according to the type of injectors and/or the mode of injection, by one of the following means: a simultaneous opening of all the electromagnetic injectors whether connected to the intake manifold or to each cylinder (direct injection);
  • the pre-injection can be situated: either before the excitation of the starter relay, the preinjection beginning when the starter contact is made, the starter relay not being excited until the end of the pre-injection (described with respect to FIG. 10); or during the excitation of the starter relay, the preinjection beginning with the excitation of the relay (described with respect to FIG. 11).
  • a thermal actuated switching contact and/or a thermal responsive resistance on the motor connected to the first control circuit to vary the length of the preinjection as a function of the temperature of the motor.
  • a thermal responsive resistance on the motor connected to the second control circuit to vary the duration of the supplementary injections as a function of the temperature of the motor.
  • That the first control circuit comprise a timing device blocking the said first circuit for a certain time to avoid a pre-injection during a second operation of the starter quickly following the first.
  • FIG. 1 is a diagrammatic view of the control means provided on an internal combustion motor equipped with a proportioning valve and fuel injectors;
  • FIG. 2 is a diagram showing the length of the period of excitation of the starter
  • FIG. 3 is a diagram showing the pre-injection taking place at the start of the excitation of the relay starter, before the first normal injection and the supplementary injections provided during the period of excitation of the starter, the pre-injection of fixedlength being followed in this example by a supplementary injection of variable length;
  • FIG. 4 is a diagram showing a pre-injection of variable length, and the normal injections followed immediately by a supplementary injection during the period of excitation of the starter;
  • FIG. 5 is an electrical schematic diagram of a preinjection control device according to the present invention.
  • FIG. 6 is is a schematic diagram of a device for controlling supplementary injections
  • FIG. 7 is a diagram showing the production of voltages at various points in the circuit of FIG. 5;
  • FIG. 8 is a diagram showing the production of various voltages developed at certain points in the circuit of FlG. 6;
  • F IG. 9 is a diagrammatic view of a variant of the embodiment of the system of FlG. 1 corresponding to the case in which the pre-injection takes place before the excitation of the starter relay;
  • FIG. is a diagram showing, while the starter contact is closed, the length of the pre-injection and the length of the excitation of the starter relay in the embodiment of the invention of FIG. 9;
  • FIG. 11 is a diagram, corresponding to the one of FIG. 4, showing the pre-injection and the supplementary injections being composed by multi-injections.
  • each injector receives fuel under pressure through an electromagnetically controlled proportioning valve 5.
  • a pump 3 is provided to supply fuel at constant pressure to the proportioning valve 5, drawing it from reservoir 1 through a filter 2.
  • a pressure regulator 4 is provided to regulate the pressure of the fuel.
  • the proportioning valve 5 is periodically operated with the rotation of the motor 9 by a power circuit P which receives, in normal operation, fuel injection control pulses from a computer C which computes the injection durations.
  • Device P is a suitable electrical device for operating the electromagnetic valve 5.
  • the injection durations are a function of various operating parameters of the motor such as motor temperature, oil pressure, speed, etc. detected by suitable sensors a, b and c.
  • the sensor information is supplied to the computer.
  • a pulse emitter I is connected to the crankshaft of the motor. Each successive pulse from I triggers a calculation in computer C and a fuel injection from P.
  • the power device P is also operated, when the motor is started, by a pre-injection control device CP, and a supplementary injection control device CA.
  • the device CP receives inputs from a thermo-contact switching element TC and/or a thermally responsive resistance TS which supply signals to CA to determine the characteristics of the pre-injections.
  • the device CA receives inputs from thermo-contact switching element TC and/or thermally responsive resistance TS to determine the characteristics of the supplementary injections.
  • the two devices CA, CP are also connected to a motor starter relay RD.
  • devices CA and C? are controlled by the motor starter contact CD, and CA, CP and RD are excited only when starter contact CD is operated. Relay RD can, of course, be excited only at the end of the action of the device CP.
  • the period of excitation of the motor starter during a cold start extends over a time period t1.
  • a pre-injection from C P of duration :2 followed immediately by a supplementary injection from CA of duration r3.
  • the supplementary injection has a duration [3 which depends upon the temperature of the motor.
  • a pre-injection from C? of a longer time t2 which varies as a function of the temperature of the motor, this pre-injection, in this example, preceding the first normal duration injection of time t4 in the motor.
  • the first normal duration injection of length :4 which follows the pre-injection of duration t2 is triggered when the starter is energized, and the normal injection duration is increased by a supplementary injection of duration 23 from CA, this duration likewise being determined as a function of the temperature of the motor.
  • the supplementary injections are cut off and the motor is running with injections of normal duration t4.
  • the length of the normal injections is, of course, a function of the temperature of the motor as controlled by computer C.
  • the pre-injection control device CP shown in FIG. 5 has an input E, connected to the motor starter contact, an output S connected to the supplementary injection control device CA, and an output S connected to the power device P controlling the proportioning valve 5.
  • the pre-injection control device CP is essentially of a monostable circuit with a programmable, uni-junction transistor T.4.
  • the control electrode of T.4 is fixed at a certain potential, on the one hand by a voltage divider formed by resistors R10 and R.14 connected between the voltage source and the ground, and on the other hand by a current generator formed by transistor T5. These two sources set a potential Vg at the control electrode of T.4.
  • the emitter of T5 is connected through a variable resistor R.l2 to the voltage source and the collector is connected to the control electrode of the programmable uni-junction transistor T.4, as well as to the middle point of the voltage divider R10, R14 through a resistor R.l3.
  • the base of transistor T5 is fixed at a certain potential by a voltage divider formed by resistors R.l5 and R16 connected in series with thermally actuated switch TC, the whole network being connected between the voltage source and ground.
  • Transistor T.5 is blocked (non-conductive) when the thermal switch TC is open, and it delivers a constant current when switch TC is closed. If it is desired to vary the current pro Jerusalem by the current generator T.5 as a function of the temperature of the motor, a thermally responsive resistor (not shown) can be placed in parallel with resistor R16 and switch TC.
  • Uni-junction transistor T.4 has its anode connected to one of the terminals of a capacitor C2 through a resistor R8. The other terminal of the capacitor C2 is connected to ground.
  • Capacitor C2 is charged from the voltage source by a voltage divider comprising resistors R5 and R6 connected in parallel, but separated by a diode D2, and a resistor R.7 connected to ground through the collector-emitter circuit of a transistor T.3.
  • the input E of the pre-injection control device CP is connected to the monostable circuit described, by a resistor R] and a diode D.1 connected to the base of a transistor T1 through a resistor R.2.
  • the base of T.l is connected to ground through a resistor R.3.
  • the collector of transistor T.] is directly connected to the voltage source, while its emitter is connected to the base of transistor T.2 through a resistor R4 and a capacitor C1, the base of the transistor T.2 also being connected to ground through resistor R.9.
  • the collector-emitter circuit of transistor T.2 is connected between the anode of the programmable unijunction transistor T.4 and ground.
  • the input E, of the device CP is also connected, again through resistor R1 and diode D1, to the base of a transistor T.7 by means of another resistor R17.
  • the collector of transistor T.7 is also connected to the resistor R.17 by a resistor R19.
  • the collector of transistor T.7 constitutes the output S, of device CP while the emitter constitutes the output S thereof.
  • a transistor T.6 is also provided, its base being connected to the cathode of the uni-junction transistor R4, and its emitter to ground.
  • the collector of T.6 is connected to resistor R.l7 and the base of the transistor T.7, and also to the base of transistor T.3 through a resistor R.l8.
  • the device CP is described below. Assuming that a voltage is applied to the monostable circuit by the voltage source, but the starter contact is not closed and there is no E, input, transistors T.l, T2, T.3 are blocked. T.6 is conductive so that T.7 is blocked and no signal can appear at outputs 5,, S At this time, the uni-junction transistor T.4 is conductive since as the supply voltage is applied to its anode by R.6, D.2 and R.8 and the voltage Vg applied to its control electrode, as determined by the voltage divider constituted by resistors R10 and R14 is sufficient to make it conductive. The voltage drop across R.ll when T.4 is on creates the forward bias at the base of T.6 to turn on the latter.
  • control signal voltage is applied to input [3,, which is of sufficient magnitude to make transistors T.l, T.7 and T3 conductive, this control signal being applied directly to the respective base electrodes of these transistors.
  • transistor T.2 is made conductive transitorily since a pulse is applied to its base from capacitor C] which was fully discharged, as T1 conducts. As T.2 conducts, capacitor C.2 is completely discharged through resistor R.8 and the collector-emitter circuit of transistor T.2. This lowers the voltage at the anode of programmable uni-junction transistor T.4 and it is blocked.
  • the excitation of the starter relay by closing the starter contact causes the blocking of programmable, uni-junction transistor T.4 which in turn causes the appearance of a current at the output 5, to initiate the start of a pre-injection.
  • T.4 programmable, uni-junction transistor
  • R11 and T.6 non-conductive, causing a rise in the voltage at the base of T.7 which makes it conductive.
  • the starter contact is engaged only momentarily when it is released, the input voltage at E, is removed and T.l is blocked. This also blocks T.2.
  • capacitor C2 is quickly charged through resistors R5 and R6 to the voltage VA, the voltage at the junction of R6, R7 and D.2. Then resistor R.5 alone insures the charging of condenser C.2 since diode D2 is polarized in the opposite direction and eliminates, from the voltage divider, the resistors R.6 and R7. The voltage at the terminals of capacitor C.2 then evolves more slowly, as indicated in FIG.
  • the duration of the pre-injections can be regulated by the variable resistor R12 in the collector of T.5 which determines the control voltage Vg for making conjunction T.4 conduct in accordance with the rise in its anode voltage across C2.
  • a temperature dependency on the motor can be introduced either by the thermo-contact switch TC, as represented in the base of T.5, or by a thermal sensitive resistor (not shown) in its stead, or by the two devices simultaneously, with provision of a parallel hookup.
  • the switch TC and/or the thermal responsive resistor are connected to the base of T.12 and would thereby also control Vg.
  • the particular hookup of the capacitor C1 makes it possible, in an extremely simple way, to prevent the circuit CP from producing another signal at S, to operate P to produce another pre-injection in the course of operation of the starter immediately following the first.
  • the motor has not started, it is, of course, necessary to operate the starter a second time. In this case, however, a fresh pre-injection of fuel is no longer needed, it having been made previously, and on the contrary it should be avoided in order not to flood the motor with excess fuel.
  • capacitor C.l can discharge but very slowly through leak resistor R.20, the discharge period being much longer than the period of excitation ll of the starter. Thus, a second signal at E, occurring before C.l discharges will not be passed to the base T1 to make it nonconductive and thereby block the uni-junction T.4.
  • the supplementary injection control device CA represented in FIG. 6, includes in this example an input E connected with the motor starter contact. There is also an input E connected, where the case applies, to the output S, of the pre-injection control device CP of FIG. 5. An input E is connected to the normal injection time computer C. The output 5,, of device CA is connected to the power control P of the proportioning valve-to control its opening during the times of the supplementary injections.
  • Inputs E, and E are connected to the base of a transistor T.8 by means of a capacitor C3, a diode D13 and a resistor R24, and through capacitor C4, diode D.5 and resistor R.26 respectively.
  • the junction points of capacitor C3 and diode D3, and of capacitor C4 and diode D5, respectively, are connected to ground through the respective resistors R27 and R28.
  • the emitter of transistor T8 is connected to ground while its collector is connected on the one hand to input E through diode D4 and resistor R23, and on the other hand to one of the terminals of a capacitor G5.
  • the anode and cathode of the diode D4 are connected, respectively, to ground through resistors R21 and R22.
  • the second terminal of capacitor C5 is connected to the base of a transistor T10 by a diode D6 as well as to the collector of a transistor T9 which forms part of a current generator.
  • the current generator also includes a voltage divider formed by resistors R30 and R31 connected between the voltage supply and ground, the junction point of this voltage divider being connected to the emitter of transistor T.9.
  • a capacitor C6 is connected between the emitter of the said transistor T.9 and its base and the base is also connected to ground through a resistor R32 and to the emitter of another transistor T .11.
  • the collector of transistor T.ll is connected directly to the supply voltage while its base is connected to the junction point of a voltage divider formed by resistors R34 and R35 which are connected between the supply voltage and ground.
  • a thermal sensitive resistor TS and a capacitor C7 are connected in parallel with resistor R35.
  • the collector of transistor T10 is connected to the supply voltage through a resistor R33 and to the output 5:; through a diode D7.
  • the base of transistor T8 is also connected to ground through a resistor R29.
  • the device CA works as described below.
  • the current generator which comprises transistors T9 and T.1l, delivers a certain current which is a function of the temperature of the motor as a result of the disposition of thermal sensitive resistor TS in the base circuit of transistor T11.
  • T9 and T.ll set the voltage V at the second terminal of capacitor C5.
  • Resistor TS has a negative temperature coefficient.
  • a decrease in the value of TS reduces the voltage dropped across R.35 and the forward bias on the base of T] I, making it less conductive.
  • the emitter of T.ll feeds the base of T.9 which is of opposite conductivity type.
  • transistor T8 is made conductive and the voltage V returns to zero. As a result, the voltage at point V falls to the negative voltage of the supply voltage with respect to ground. Transistor T is now blocked, with the result that a positive signal appears at output S provoking the start of a supplementary injection.
  • capacitor C5 is charged by the current generator comprising transistors T9 and T.l1 by a current which is a function of the temperature of the motor which is served by TS. At the end of a certain time which is a function of this temperature,
  • the voltage at point V reaches a higher voltage than the one corresponding to the voltage drop through diode D6 and transistor T10 (about 1.4 v), and transistor T.l0 begins to conduct, grounding output 5;, and thus provoking the discontinuance of the supplementary injection.
  • the result is, in the arrangement according to the invention, that it is possible to provide a starting sequence comprising a pre-injection, and a supplementary injection added to each normal injection during the action of the starter, which makes it possible to obtain an enrichment proportional to the speed of the motor without risk of flooding, and to provide the motor with a mixture which is always of the same richness regardless of the starting speed of the motor, regardless of the time required for the motor to start, and regardless of the moment at which the starter ceases to act.
  • the closing of the contact CD directly controls only the devices C P and CA.
  • the device CP controls the excitation of starter relay RD. This can be accomplished, for example, by having the S, output of the circuit of FIG. 5 permit the starter relay RD to receive current after a delay corresponding to the duration of the pre-injection. To accomplish this, for example, the output S, of the circuit of FIG. 5, which appears at the end of the pre-injection pulse, can be used.
  • FIG. 10 The corresponding timing diagram for the FIG. 9 arrangement is shown in FIG. 10 where t1 represents the length of time the starter contact CD is closed, t2 the duration of the pre-injection, and t1 the actual time of the excitation of starter relay RD.
  • FIG. 11 shows a diagram of the times of the preinjection and of the supplementary injections in the case where multi-injections are used during each period.
  • the timing diagram corresponds generally to that of FIG. 4 with the exception of the use of the multiinjectors.
  • an electronic fuel-injection system of the type for a motor energized by a starter circuit means including a switch contact which is actuated for a time to produce a starting signal to operate a means for starting the motor said fuel injection system including injection means for supplying fuel to the motor and computer means for controlling the duration of normal injections supplied by said injection means during the turning of the motor
  • the improvement comprising first control circuit means responsive to the starting signal for operating said injection means to supply a pre-injection of fuel of a predetermined duration to the motor prior to its starting and the application of the normal injections, and second control circuit means responsive to the starting signal for operating said injection means to supply supplementary injections of fuel to the motor in a predetermined time relationship with the normal injections for a duration not to exceed the production of the starting signal.
  • a system as in claim 1 further comprising means connected to said first control circuit means and responsive to the temperature of the motor to control the duration of the fuel pre-injection.
  • a system as in claim 1 further comprising means responsive to the temperature of the motor and connected to said second control circuit means to vary the duration of the supplementary fuel injections.
  • said first and second control circuit means includes means for controlling said injection means to produce a supplementary fuel injection immediately following a pre-injection
  • said first control circuit means includes means for disabling said first control circuit means for a predetermined time to prevent a pre-injection of fuel during a subsequent operation of the starter switch contact.
  • said first control circuit means includes an input for receiving said starting signal, first transistor means having an output electrode at which the control signal for causing the preinjection is produced and a control electrode, controllable transistor means having a control electrode, an anode and a cathode, circuit means for producing a control potential for said control electrode, a capacitor connected to the anode of said controllable transistor means, charging circuit means for supplying a potential to said capacitor to establish the anode potential with respect to the control electrode potential of said controllable transistor means, output means connected to said controllable transistor for supplying a control signal to said control electrode of said first transistor means, said controllable transistor means becoming conductive in response to a potential on said capacitor which exceeds the potential at the control electrode by a certain value, said controllable transistor means when conductive producing a control signal across said output means which operates said first transistor means to terminate the production of the pre-injection control signal.
  • circuit means for producing the control potential for said controllable transistor means includes means responsive to the temperature of the motor for determining the control potential of the uni-junction transistor means.
  • said charging circuit means for said capacitor includes a voltage divider means having a first impedance means in parallel with a portion thereof and being connected to the voltage divider by a diode, the capacitor charging up to the voltage determined by the voltage divider in a rapid manner at a slower rate through the said first impedance means which is isolated from the voltage divider by said diode.
  • a system as in claim 9 further comprising second transistor means connected to said capacitor to discharge the same, a second capacitor connected in the control electrode circuit of said second transistor and responsive to the starting signal produced by the first closing of the starter switch contact to operate said second transistor means to discharge said first capacitor, said second capacitor preventing the operation of said second transistor means to discharge said first capacitor for a predetermined time.
  • said second control circuit means comprises a first input for receiving the starting signal and a second input for receiving a normal fuel injection signal from said computing means and means responsive to the occurrence of said starting signal and a normal fuel injection signal for producing a supplementary fuel injection signal.
  • said second control signal means also includes a third input for receiving a pre-injection signal from said first control circuit means and produces a supplementary fuel injection signal in response to the pre-injection signal and the starting signal.
  • said second control circuit means includes first transistor means including an output electrode at which said supplementary fuel injection control signal is produced and a control electrode, and timing means responsive to the normal injection signals from said computing means for periodically operating said first transistor means to produce the supplementary fuel injection control signals.
  • timing means includes capacitor means, charging circuit means for charging said capacitor means to a first voltage level which operates said first transistor means to terminate the production of a said supplementary fuel injection control signal.
  • timing means also includes means responsive to the temperature of the motor for controlling the charging time of said first capacitor means to said first voltage level.

Landscapes

  • 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)
US00284614A 1971-09-10 1972-08-29 Electronic fuel injection control devices for internal combustion motors Expired - Lifetime US3812830A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7132677A FR2151715A5 (de) 1971-09-10 1971-09-10

Publications (1)

Publication Number Publication Date
US3812830A true US3812830A (en) 1974-05-28

Family

ID=9082746

Family Applications (1)

Application Number Title Priority Date Filing Date
US00284614A Expired - Lifetime US3812830A (en) 1971-09-10 1972-08-29 Electronic fuel injection control devices for internal combustion motors

Country Status (3)

Country Link
US (1) US3812830A (de)
DE (1) DE2243680A1 (de)
FR (1) FR2151715A5 (de)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3991726A (en) * 1974-01-26 1976-11-16 Nippondenso Co., Ltd. Electronically controlled fuel injection system
US4069795A (en) * 1975-11-06 1978-01-24 Allied Chemical Corporation Start-up control for fuel injection system
US4161160A (en) * 1977-10-31 1979-07-17 Caterpillar Tractor Co. Fuel additive injection system for diesel engines
US4205635A (en) * 1976-03-26 1980-06-03 Robert Bosch Gmbh Fuel mixture control system
US4215656A (en) * 1976-02-12 1980-08-05 Nissan Motor Company, Limited Electronic closed loop air-fuel ratio control system for use with internal combustion engine
US4239022A (en) * 1977-06-24 1980-12-16 Robert Bosch Gmbh Method and apparatus for fuel control of an internal combustion engine during cold-starting
US4242992A (en) * 1977-10-07 1981-01-06 Nissan Motor Company, Limited Internal combustion engine with fuel injectors
US4266523A (en) * 1974-03-22 1981-05-12 Holec N.V. Electromagnetically actuated pumps
US4329951A (en) * 1979-04-21 1982-05-18 Lucas Industries Limited Fuel injection system
US4372278A (en) * 1980-10-20 1983-02-08 Smith Rodney D High temperature and high pressure fuel injection apparatus for internal combustion engines
USRE31218E (en) * 1977-10-31 1983-04-26 Caterpillar Tractor Co. Fuel additive injection system for diesel engines
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
US4691680A (en) * 1986-05-22 1987-09-08 Brunswick Corporation Starting-enrichment control for a fuel-injected engine
US4774916A (en) * 1987-02-11 1988-10-04 The Budd Company Measured shot ether system
US5113833A (en) * 1989-06-19 1992-05-19 Hitachi, Ltd. Method and controller for supplying fuel to cylinders of multicylinder internal combustion engine
US5465701A (en) * 1993-12-27 1995-11-14 Hitachi America, Ltd. Internal combustion fuel control system
US5529035A (en) * 1994-11-08 1996-06-25 Hitachi America, Ltd. Cold start fuel injector with heater
WO2001025618A1 (en) * 1999-10-04 2001-04-12 Cosimo Sarno Multi-injection systems
US20070012283A1 (en) * 2005-07-14 2007-01-18 Rockwell Andrew D Internal combustion engine start-up operating mode and engine using same
US20070062477A1 (en) * 2005-09-05 2007-03-22 Kokusan Denki Co., Ltd. Engine control device
GB2446691A (en) * 2007-02-15 2008-08-20 Ford Global Tech Llc Method for starting a direct injection internal combustion engine comprising adjusting a number of injections per combustion cycle
US20150096529A1 (en) * 2012-02-29 2015-04-09 Continental Brasil Indústria Automotiva Ltda. Cold start-up system of an internal combustion engine and internal combustion engine

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2522283C3 (de) * 1975-05-20 1981-02-19 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur Start- und/oder Nachstartanreicherung des einer Brennkraftmaschine zugeführten, mittels einer elektrischen Kraftstoffeinspritzanlage gebildeten Kraftstoff-Luft-Gemisches
GB1567041A (en) * 1975-11-06 1980-05-08 Allied Chem Fuel injection system
JPS5578131A (en) * 1978-12-06 1980-06-12 Nissan Motor Co Ltd Fuel ejection control device
DE2848563C2 (de) * 1978-11-09 1984-06-28 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur in der Regel ergänzenden Kraftstoffzumessung bei einer Brennkraftmaschine mit Fremdzündung während Sonderbetriebsbedingungen mittels eines elektrisch betätigten Sonderzumeßorgans, insbesondere eines Einspritzventils
JPS57206737A (en) * 1981-06-11 1982-12-18 Honda Motor Co Ltd Electronic fuel injection controller of internal combustion engine
JPS58222927A (ja) * 1982-06-18 1983-12-24 Honda Motor Co Ltd 車輌用内燃エンジンの始動時の燃料噴射方法
JPH06103005B2 (ja) * 1986-01-31 1994-12-14 株式会社日立製作所 電子制御式燃料噴射制御方法
DE3617104A1 (de) * 1986-05-21 1987-11-26 Bosch Gmbh Robert Verfahren und elektronisches brennkraftmaschinensteuersystem zur kaltstartsteuerung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
US3683871A (en) * 1970-07-17 1972-08-15 Gen Motors Corp Fuel supply system for an internal combustion engine providing voltage compensated cranking enrichment
US3716034A (en) * 1969-10-02 1973-02-13 Bosch Gmbh Robert Temperature-dependent time-delay switch
US3734067A (en) * 1970-01-22 1973-05-22 Bosch Gmbh Robert Fuel injection system for internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US3716034A (en) * 1969-10-02 1973-02-13 Bosch Gmbh Robert Temperature-dependent time-delay switch
US3734067A (en) * 1970-01-22 1973-05-22 Bosch Gmbh Robert Fuel injection system for internal combustion engine
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
US3683871A (en) * 1970-07-17 1972-08-15 Gen Motors Corp Fuel supply system for an internal combustion engine providing voltage compensated cranking enrichment

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991726A (en) * 1974-01-26 1976-11-16 Nippondenso Co., Ltd. Electronically controlled fuel injection system
US4266523A (en) * 1974-03-22 1981-05-12 Holec N.V. Electromagnetically actuated pumps
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
US4069795A (en) * 1975-11-06 1978-01-24 Allied Chemical Corporation Start-up control for fuel injection system
US4215656A (en) * 1976-02-12 1980-08-05 Nissan Motor Company, Limited Electronic closed loop air-fuel ratio control system for use with internal combustion engine
US4205635A (en) * 1976-03-26 1980-06-03 Robert Bosch Gmbh Fuel mixture control system
US4239022A (en) * 1977-06-24 1980-12-16 Robert Bosch Gmbh Method and apparatus for fuel control of an internal combustion engine during cold-starting
US4242992A (en) * 1977-10-07 1981-01-06 Nissan Motor Company, Limited Internal combustion engine with fuel injectors
USRE31218E (en) * 1977-10-31 1983-04-26 Caterpillar Tractor Co. Fuel additive injection system for diesel engines
US4161160A (en) * 1977-10-31 1979-07-17 Caterpillar Tractor Co. Fuel additive injection system for diesel engines
US4329951A (en) * 1979-04-21 1982-05-18 Lucas Industries Limited Fuel injection system
US4372278A (en) * 1980-10-20 1983-02-08 Smith Rodney D High temperature and high pressure fuel injection apparatus for internal combustion engines
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
AU599110B2 (en) * 1986-05-22 1990-07-12 Brunswick Corporation Starting-enrichment control for a fuel-injected engine
US4691680A (en) * 1986-05-22 1987-09-08 Brunswick Corporation Starting-enrichment control for a fuel-injected engine
US4774916A (en) * 1987-02-11 1988-10-04 The Budd Company Measured shot ether system
USRE35195E (en) * 1989-06-19 1996-04-02 Hitachi, Ltd. Method and controller for supplying fuel to cylinders of multicylinder internal combustion engine
US5113833A (en) * 1989-06-19 1992-05-19 Hitachi, Ltd. Method and controller for supplying fuel to cylinders of multicylinder internal combustion engine
US5465701A (en) * 1993-12-27 1995-11-14 Hitachi America, Ltd. Internal combustion fuel control system
US5529035A (en) * 1994-11-08 1996-06-25 Hitachi America, Ltd. Cold start fuel injector with heater
WO2001025618A1 (en) * 1999-10-04 2001-04-12 Cosimo Sarno Multi-injection systems
US7201127B2 (en) 2005-07-14 2007-04-10 Caterpillar Inc Internal combustion engine start-up operating mode and engine using same
US20070012283A1 (en) * 2005-07-14 2007-01-18 Rockwell Andrew D Internal combustion engine start-up operating mode and engine using same
US20070062477A1 (en) * 2005-09-05 2007-03-22 Kokusan Denki Co., Ltd. Engine control device
US7412953B2 (en) * 2005-09-05 2008-08-19 Kokusan Denki Co., Ltd. Engine control device
GB2446691A (en) * 2007-02-15 2008-08-20 Ford Global Tech Llc Method for starting a direct injection internal combustion engine comprising adjusting a number of injections per combustion cycle
GB2446691B (en) * 2007-02-15 2011-08-31 Ford Global Tech Llc Method for starting an engine
US8656881B2 (en) 2007-02-15 2014-02-25 Ford Global Technologies, Llc Direct injection event-based engine starting
US9222423B2 (en) 2007-02-15 2015-12-29 Ford Global Technologies, Llc Direct injection event-based engine starting
US20150096529A1 (en) * 2012-02-29 2015-04-09 Continental Brasil Indústria Automotiva Ltda. Cold start-up system of an internal combustion engine and internal combustion engine

Also Published As

Publication number Publication date
DE2243680A1 (de) 1973-03-15
FR2151715A5 (de) 1973-04-20

Similar Documents

Publication Publication Date Title
US3812830A (en) Electronic fuel injection control devices for internal combustion motors
US3483851A (en) Fuel injection control system
US3704702A (en) Start-up fuel injection system
US3463130A (en) Fuel injection control system
US4148282A (en) Method and apparatus for cold starting fuel injected internal combustion engines
US4114570A (en) Start enrichment circuit for internal combustion engine fuel control system
US3792693A (en) Stored temperature cold start auxiliary system
US4082066A (en) Modulation for fuel density in fuel injection system
US3971354A (en) Increasing warm up enrichment as a function of manifold absolute pressure
CA1051997A (en) Altitude compensation system for a fuel management system
US3570460A (en) Control system for blocking fuel injection in an internal combustion engine
US3646917A (en) Auxiliary circuit for electronic fuel control systems to facilitate cold starting
US3734067A (en) Fuel injection system for internal combustion engine
US3683871A (en) Fuel supply system for an internal combustion engine providing voltage compensated cranking enrichment
US4027641A (en) Control apparatus for starting internal combustion engines
US3628510A (en) Fuel supply system for an internal combustion engine providing timed cranking enrichment
US4058709A (en) Control computer for fuel injection system
JPS6029824B2 (ja) 内燃機関の低温始動方法および装置
US3566846A (en) Electronically controlled fuel injection arrangement for internal combustion engines
US4132210A (en) Fuel injection system with switchable starting mode
US3797465A (en) Fuel injection system for internal combustion engines
US3470854A (en) Fuel injection system for internal combustion engines
US3720191A (en) Acceleration enrichment circuitry for electronic fuel system
US3646915A (en) Cold start auxiliary circuit for electronic fuel control system
US3203410A (en) Electrically controlled fuel injection system