US3653365A - Electronic control system for the injectors of internal engines - Google Patents

Electronic control system for the injectors of internal engines Download PDF

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US3653365A
US3653365A US16735A US3653365DA US3653365A US 3653365 A US3653365 A US 3653365A US 16735 A US16735 A US 16735A US 3653365D A US3653365D A US 3653365DA US 3653365 A US3653365 A US 3653365A
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condenser
transistor
uni
voltage
pulse
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Louis A Monpetit
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Societe des Procedes Moderness d'Injection Sopromi
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Societe des Procedes Moderness d'Injection Sopromi
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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
    • F02D41/32—Controlling fuel injection of the low pressure type
    • F02D41/36—Controlling fuel injection of the low pressure type with means for controlling distribution
    • F02D41/365—Controlling fuel injection of the low pressure type with means for controlling distribution with means for controlling timing and distribution
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • a first circuit controlled by the rotation of the engine provides for the starting of saw-tooth voltage wave, the length of the rising slope of which depends on the speed of rotation while the peals of said pulses trigger the injections which last until the end of the pulse.
  • a delay for said triggering is advantageously obtained by the difference between the time constants of two flip-flops the first of which is constant while that of the second flip-flop depends on the operative parameters of the engine, the end of the injection being defined by the end of the signal produced by the first flip-flop.
  • the present invention has for its object an arrangement for electronically controlling injectors in internal combustion engines wherein each injection is triggered by a pulse generator controlled by the rotation of the engine.
  • voltage generators With electronically controlled injectors, voltage generators have previously been used, operating as a function of said speed of rotation, the voltage obtained defining a lag for the injection with reference to a signal produced by a pulse generator associated with the rotation of the engine, which lag diminishes with an increase of the speed of rotation; said pulse generator is designed in a manner such that the lag becomes zero for a maximum speed of rotation, that is the lead of the injection with reference to the upper idle center becomes a maximum.
  • the present invention has for its object to eliminate said drawbacks and it has more particularly for its object an electronic control system for the injectors of internal combustion engines, wherein the injection is triggered by a pulse generator controlled by the rotation of the engine.
  • a lag for the injection by means of electronic delaying means controlled by the rotary speed of the engine, said means including a circuit generating a saw-tooth voltage the rise of which is triggered by pulses fed by said pulse generator while its peak triggers an injector, the slope of said saw-tooth voltage being such that, according to the spacing in time of the generated pulses, that is according to the rotary speed of the engine, the spacing between the peaks and troughs of said saw-tooth voltage is reduced together with the lag of the injection when the rotary speed increases.
  • Complementary electronic delay means may be pro vided which operates under the control of the engine load of the engine and which includes two flip-flops triggered simultaneously by a signal controlled directly or indirectly by the rotation of the engine.
  • the first flip-flop produces a rectangular signal of a constant duration while the second flip-flop produces a rectangular signal the duration of which varies with the load of the engine.
  • the flip-flops act on a common circuit designed in a manner such that it produces a rectangular signal for controlling the injection, the duration of which is equal to the difference between the durations of the signals produced by said first and second flip-flops.
  • the injection begins at the end of the signal produced by the second flip-flop and ends together with the signal produced by the first flipflo l y way of example and in order to further the understanding of the description, the accompanying drawings are provided in which:
  • FIG. 1 is a block diagram of the arrangement according to the invention.
  • FIG. 2 sets forth graphs showing the succession of signals produced by the different sections of the arrangement illustrated in FIG. 1;
  • FIG. 3 is a schematic diagram of an electronic circuit executed in conformity with the invention.
  • FIG. 4 illustrates the succession of signals produced by the different sections of the arrangement illustrated in FIG. 1 corresponding to one value of rotary speed of the engine.
  • FIG. 5 illustrates the succession of signals produced by the different sections of the arrangement illustrated in FIG. 1 corresponding to a higher value of rotary speed of the engine than illustrated in FIG. 4.
  • pulse generator A controlled by the rotation of the engine sends a pulse to the saw-tooth voltage generator B, said saw-tooth voltage being transformed at C into positive rectangular signals which are cut off during a period To (FIG. 2) each time a pulse is applied to the saw-tooth generator B and which start at each peak of the saw-tooth voltage.
  • the circuit C simultaneously triggers flip-flops D and E each time it produces a rectangular signal.
  • the flip-flop D produces a rectangular signal of constant duration T1
  • the flip-flop E produces a rectangular signal of duration T2, the length of which depends on various operative parameters of the engine which parameters are transmitted through the sensors a,b and c.
  • the flip-flop signals T1 and T2 are applied to a common circuit F producing a rectangular signal for controlling the injection and the duration of which, T, is equal to the difference T1-T2 defining the duration of injection.
  • Said signal of duration T is transmitted to a circuit G distributing the signals T into the injectors H in accordance with the predetermined order of injection.
  • FIG. 2 illustrates the various signals produced by the successive elementary circuits of FIG. 1.
  • the pulse A produces transient pulses the spacing of which depends on the rotary speed of the engine.
  • the pulses illustrated in interrupted lines correspond to a higher speed of rotation, which means a shorter interval between successive pulses.
  • Each pulse triggers saw-tooth voltage generator B. Said saw-tooth voltage pulses increase linearly during a period To until a well-defined peak value is obtained.
  • the circuit C begins producing a rectangular signal To and the voltage produced by the generator B decreases linearly until the next pulse received from pulse generator A cuts off the rectangular signal produced by the circuit C.
  • the interval between two successive pulses decreases when the rotary speed increases. Consequently the saw-tooth voltages cannot decrease as far as far lower speeds.
  • the duration To is shorter, since the peak of the saw-tooth voltages does not vary.
  • the duration To corresponds to the lag required for injection as a function of the speed of rotation, with reference to the pulse produced by the generator A. This lag decreases rapidly for increasing speeds by the shortening of the rising and falling slopes of the saw-tooth voltage.
  • the circuits B and C produce signals which lead with reference to the upper idle centers, the lead measured by the rotary angle travelled over by the crankshaft varying with the speed of rotation in accordance with the lengths of the voltage slopes.
  • the invention utilizes two flip-flops, D and E, as mentioned hereinabove.
  • the first flip-flop D produces a rectangular signal of constant duration T1 while the second flip-flop E produces a rectangular signal of variable duration T2.
  • T2 is a function of the load on the engine.
  • the injection lag T plus T2 is illustrated in FIGS. 4 and 5.
  • T0 varies as a function of the rotary speed of the engine
  • T2 varies as a function of the load on the engine.
  • a series of timing pulses having a predetermined frequency which corresponds to one rotary speed of the engine are illustrated on line A.
  • FIG. illustrates a corresponding series of timing pulses (line A) having a predetermined frequency of about twice the frequency of the pulses illustrated in FIG. 4, thus representing the increase in the rotary speed of the engine.
  • each timing pulse triggers the saw tooth voltage generator which generates the saw-tooth voltage illustrated on lines B and B. The peak of the saw-tooth voltage does not vary.
  • the rise time for the respective saw-tooth voltages decreases as the frequency of the pulses increases, corresponding to an increase in the rotary speed of the engine.
  • the rise time of the saw-tooth voltages is represented by 70 and T'O, respectively.
  • the first rectangular pulse generating means D and the second rectangular pulse generating means E are triggered each time the saw tooth voltage reaches its peak.
  • the first rectangular pulse generated by the first generating means has a predetermined duration represented in FIGS. 4 and 5 by T1 and T 1, respectively.
  • the second rectangular pulse generated by the second generating means has a duration which varies as a function of at least one engine parameter such as the load on the engine. These durations are represented by T2 and T2, respectively.
  • the durations 72 and T2 are shown as being unequal, thus corresponding to the different loads on the engine. As the load on the engine decreases, the time T2 decreases.
  • the actuating pulse having a duration represented by T, beings at a variable time interval equal to T0 plus T2 after each timing pulse generated by the pulse generator, and the actuating pulse ceases at the end of the first rectangular pulse from the first generator means which has a fixed width or duration T1.
  • the time 70 is variable and is determined by the frequency of the timing pulses generated by the pulse generator, which is a function of the rotary speed of the engine.
  • the time T2 varies as a function of at least one of the engine parameters such as the load on the engine.
  • the ignition lag or elapsed time 70 plus 72 between each timing pulse of the pulse generator and the corresponding actuating pulse, having a duration T is a function of both the rotary speed of the engine and the load on the engine. This can be clearly seen by comparing the ignition lag of FIG. 4 with the ignition lag TO plus T2 illustrated in FIG. 5. Also, the duration of the actuating pulse, T and T, respectively, increases as the load in the engine increases, since T2 and T2 are decreasing.
  • FIG. 3 illustrates the electronic circuit incorporating the circuits B,C,D,E and F shown in block diagram in FIG. 1.
  • the saw-tooth voltage generator B comprises a program-controllable uni-junction transistor T2 and a condenser 3 charged under constant current conditions through a resistance 17, a transistor TI and a diode 19, while it is discharged under constant current conditions through the transistor T8 and the resistance 20.
  • the base of the transistor T1 is maintained at a predetermined adjustable voltage by a voltage-divider constituted by the resistances 5 and 7 connected by a potentiometer 6, while the electrode controlling the uni-junction transistor T2 is maintained at another voltage defined by a voltage-divider comprising series resistances 15 and 16.
  • the point connecting the anodes of the diode 19 and of the program-controllable uni-junction transistor T2 with the collector of the transistor TI is grounded through the collector-emitter circuit of the transistor T4 while the base of transistor T4 forms the input E of the saw-tooth voltage generator to which the signal produced by the pulse generator A is applied. Said input E is grounded through the resistance 23.
  • the control electrode of the uni-junction transistor T2 is connected with the base of another transistor T10 through a resistance 25 forming part of the voltage-divider constituted by the resistances 27, 26, 25 and 24.
  • the collector-emitter circuit of said transistor T10 is connected in parallel with a condenser 11 between the point connecting further resistances 21 and 22 and ground.
  • the resistances 21 and 22 form with a grounded potentiometer 9 a further voltage-divider, the slider of said potentiometer 9 defining the voltage applied to the base of the transistor T8 so that said voltage may assume a predetermined adjustable value.
  • the circuit C includes transistor T12 the emitter-collector circuit of which is connected in series with the resistance 28 between the supply of voltage and ground, while its base is connected with the point connecting the resistances 26 and 27.
  • the collector of the transistor T12 forms the output S of the circuit C.
  • the output signals are transmitted through the diode 29, the condenser 31 and diode 32 to flip-flop E and diode 33 to flip-flop D.
  • the point connecting the diode 29 with said condenser 31 is grounded through a resistance 30.
  • the flip-flops E and D each comprises a program-controllable uni-junction transistor, T37 or T49 connected in series with variable resistance 38 and with fixed resistance 48, respectively.
  • the cathodes of said program-controllable unijunction transistors are connected with the bases of the corresponding transistors T41 and T52.
  • the points connecting the resistances 38 and 48 with the anodes of the uni-junction transistors T37 and T49 are grounded respectively through the collector-emitter circuits of the corresponding transistors T34 and T46 and through the corresponding condensers 36 and 47 in parallel with the latter.
  • the bases of the transistors T34 and T46 are grounded through the resistances 35 and 45 respectively and are connected with the cathodes of the corresponding diodes 32 and 33 fed by the circuit C through the condenser 31.
  • the electrodes controlling said uni-junction transistors T37 and T46 are maintained at a predetermined voltage by the voltage-dividers constituted respectively by the series resistances 39-40 and 50-51.
  • the circuit F producing the rectangular injection-controlling signals is constituted by the transistors T41 and T52, already referred to as connected through their bases with the cathodes of the corresponding programme-controllable unijunction transistors T37 and T49.
  • the collector-emitter circuit of each of said transistors T41 and T52 is connected in series with the corresponding resistances 42 or 53. between the voltage supply and ground.
  • a connection between the collector of the transistor T41 and the base of the transistor T52 is provided through a diode 43 and a resistance 44.
  • the point connecting the collector of the transistor T52 with the corresponding resistance 53 forms the output S for the rectangular signal controlling the injection and the duration of which is T.
  • the programme-controllable uni-junction transistor T2 When the voltage supply is applied and in the absence of any signal at the input E of saw-tooth voltage generator B, the programme-controllable uni-junction transistor T2 is conductive and is fed with a current the valve of which is defined by the resistance 17 and the conductance of transistor T1, as a function of the voltage applied to the base of said transistor T1.
  • the anode and the control electrode of the uni-junction transistor T2 are substantially at zero voltage so that no charge can be applied to the condenser 3.
  • the point connecting T8 resistances 25 and 26 is practically at zero voltage whereby the transistor T12 remains conductive. However, by reason of the presence of the condenser 31, this has no influence on the flip-flops D and E.
  • transistor T is nonconductive and a predetermined voltage is applied to the base of transistor T8 as defined by the voltage-divider constituted by the resistances 21 and 22 and by the position of the slider of the potentiometer 9. This results in transistor T3 conducting and condenser 3 remains in a discharged condition.
  • the uni-junction transistors T37 and T49 are conductive since the transistors T34 and T46 are non-conductive, while the condensers 36 and 47 are discharged and the electrodes controlling said program-controllable single-junction transistors T37 and T49 are subjected to a voltage which is substantially equal to zero. Consequently,
  • transistor T4 becomes momentarily conductive and the voltage applied to the anode of the transistor T2is returned substantially to Zero and said transistor T2 is cut off.
  • the pulse applied to the input E terminates, the transistor T4 is nonconductive again and a constant charging current is established, as defined by the resistance 17 and the conductive transistor T1 whereby the voltage on the anode of the uni-junction transistor T2 rises linearly.
  • the control electrode of said uni-junction transistor T2 is at to a voltage defined by the voltage divider constituted by the resistances l5 and 16, said voltage also being applied simultaneously to the base of the transistor T10 making it conductive.
  • the transistor T41 is also cut off and this causes a voltage to be applied to the base of transistor T52 which is held in a conductive condition so that the output S of the circuit F is at zero voltage.
  • the time constants T1 and T2 of the flip-flops D and E are selected so that T1 is larger than or equal to T2, the transistor T37 becomes conductive before the transistor T49.
  • T41 will become conductive. At this moment, the point connecting the resistance 42 with the collector of the transistor T41. is returned to zero voltage the output S of the circuit F.
  • the time constant of each of the flip-flops E and D is defined by the capacities of the condensers 36 and 47 and by the values of the resistances 38 and 48.
  • the modification in the duration of injection is obtained by a modification of T2 provided by the variable resistance 38 under control of the load on the engine, the timing of the end of the injection period remaining constant for a predetermined speed of rotation.
  • the saw-tooth voltage generator B its cycle loading and discharging the condenser 3 is defined by the pulses applied to the input E.
  • the slope of the rising voltage is defined by the current passing through the transistor T1
  • the slope of the falling voltage is defined by the current passing through transistor T8, that is by the voltage applied to the base of the latter
  • the time available for the charging and discharging is obviously shortened when the speed of rotation increases. Consequently, the difference between the eaks and troughs of the saw-tooth voltage decreases gradually with increasing speeds since, the duration of discharge of the condenser 3 decreases steadily.
  • the time T0 elapsing from the moment of the application of the signal at the input E for charging the condenser 3 up to the peak of the saw-tooth voltage decreases when the speed of rotation increases. Consequently the duration To is a function of the speed of rotation and according to the voltage slopes defining the charging and discharging of condenser 3, the time To decreases rapidly with an increase in the speed of rotation. Since the angle 0 measured in degrees defining the angular travel of the crankshaft beginning at the moment of the pulse produced by the pulse generator A and terminating at the end of the period To is directly proportional to the rotary speed N of the engine and is inversely proportional to said duration To, the following equation is true:
  • control electrode of the program-controllable uni-junction transistor 12 may be connected directly with the point joining the resistances 21 and 22, and transistor T10 and condenser 11 eliminated.
  • the condenser 3 begins its discharge as soon as a positive voltage appears.
  • transistor T10 and condenser 11 are retained, transistor T8 becomes conductive only after the charging of condenser 11.
  • FIG. 2 assuming a horizontal line extends across the rising and falling slopes of the saw-tooth voltage waves so as to separate said slopes.
  • An electronic control system for electromagnetic fuel injectors in an internal combustion engine comprising:
  • a pulse generator for generating timing pulses spaced as a function of the rotary speed of the engine, the spacing between the timing pulses decreasing as speed increases;
  • a saw tooth voltage generator for generating a saw tooth voltage in response to each of said pulses, the duration of said saw tooth voltage being dependent on the spacing between successive timing pulses, the time interval between each timing pulse and the peak voltage of the saw tooth voltage generated in response to the timing pulse being a function of the rotary speed of the engine, and
  • first rectangular pulse generating means for generating first rectangular pulses of predetermined width
  • second rectangular pulse generating means for generating second rectangular pulses the widths of which vary as a function of at least one engine parameter such as the load on the engine;
  • d. means for combining the outputs of said first and second rectangular pulse generating means for producing rectangular actuating pulses equal in width to the difference between the width of the first rectangular pulse and the width of the second rectangular pulse, each of said actuating pulses commencing at the end of each second rectangular pulse from said second rectangular pulse generating means and ending at the end of each first rectangular pulse from said first rectangular pulse generating means, whereby the time interval between a timing pulse generated by said pulse generator and the beginning of the actuating pulse corresponding to the timing pulse is a function of the rotary speed of the engine and the engine parameter, and the width of the actuating pulse is a function of the engine parameter.
  • said saw-tooth voltage generator includes a condenser, a circuit for charging the condenser with an adjustable constant current, a circuit for discharging the condenser under adjustable constant current conditions, a programmable uni-junction transistor connected in parallel with said condenser and the control electrode of which is connected with the condenser discharging circuit, a voltage divider feeding said control electrode and adapted to render simultaneously conductive said uni-junction transistor and said condenser discharging circuit, the charging of the condenser being started by a pulse from said pulse generator rendering said uni-junction transmission nonconductive.
  • said saw-tooth voltage generator includes a condenser, a circuit for charging the condenser with an adjustable constant current, a circuit for discharging the condenser under adjustable constant current conditions, a programmable uni-junction transistor connected in parallel with said condenser and the control electrode of which is connected with the condenser discharging circuit, a voltage divider feeding said control electrode and adapted to render simultaneously conductive said uni-junction transistor and the condenser discharging circuit, a primary transistor connected between the anode of the uni-junction transistor and ground and the base of which is connected with the pulse generator whereby it becomes momentarily conductive each time a pulse is applied to said base and the voltage applied to the anode of said uni-junction transistor is momentarily returned to zero so that said uni-junction transistor is cut off while the condenser begins its charging period.
  • said saw-tooth voltage generator includes a condenser, a circuit for charging said condenser with an adjustable constant current, a circuit for discharging said condenser under adjustable constant current conditions, a programmable uni-junction transistor connected in parallelwith said condenser and the control electrode of which is connected with said condenser-discharging circuit, a voltage-divider feeding said control electrode and adapted to render simultaneously conductive said uni-junction transistor and said condenser-discharging circuit, the charging of said condenser being started by a pulse from said pulse generator cutting off said uni-junction transistor, a voltage divider defining the current in said condenser charging circuit, a further transistor the collector of which is connected with a point of said voltage divider, the emitter of which is grounded and the base of which is connected with the control electrode of said uni-junction transistor whereby said further transistor is conductive when said uni-junction transistor is cut off and is non-conductive when said uni-junction transistor
  • said saw-tooth voltage generator includes a condenser, a circuit for charging the condenser with an adjustable constant current, a circuit for discharging the condenser under adjustable constant current conditions, a programmable uni-junction transistor connected in parallel with said condenser and the control electrode of which is connected with said condenser discharging circuit, a voltage divider feeding said control electrode and adapted to render simultaneously conductive said uni-junction transistor and the condenser-discharging circuit, the charging of said condenser being started by a pulse from said pulse generator cutting off said uni-junction transistor, a voltage-divider defining the current in said condenser-charging circuit, a further transistor the collector of which is connected with a point of said voltage-divider, the emitter of which is grounded and the base of which is connected with the control electrode of said uni-junction transistor whereby said further transistor is conductive when said uni-junction transistor is cut off and is non-conductive when said un
  • said first and second rectangular pulse generating means comprise respectively first and second flip-flops and said combining means includes a first and a second auxiliary transistor the bases of which are respectively connected with said first and second flip-flops, a resistance connected in the emitter-collector circuit of each auxiliary transistor, means for adjusting the time constant of said second flip-flop between zero and the value of the time constant of said first flip-flop, a diode connecting the collector of the auxiliary transistor connected with the second flip-flop, with the base of the auxiliary transistor connected with the first flip-flop and a connection adapted to tap said actuating pulses for the injectors off the collector of the auxiliary transistor connected with said first flip-flop.
  • a system as claimed in claim 7 wherein a programmable uni-junction transistor and a resistance connected in series between the voltage supply and the base of its associated auxiliary transistor, voltage-divider means for maintaining a predetermined voltage on the control electrode of said unijunction transistor, a condenser, a further auxiliary transistor the emitter-collector circuit of which is connected in parallel with said condenser between the anode of said uni-junction transistor and ground and the base of which is connected to said means for simultaneously triggering, so as to return to zero the voltage on the anode of said uni-junction transistor and thereby trigger said flip-flop, which returns to its initial condition when the voltage on said condenser reaches a value with reference to that on the control electrode of said uni- 0 junction transistor to render it conductive.
  • a system as claimed in claim 7 further including a diode and a condenser connected in series between said means for simultaneously triggering and said flip-flops.

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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)
  • Ignition Installations For Internal Combustion Engines (AREA)
US16735A 1969-03-10 1970-03-05 Electronic control system for the injectors of internal engines Expired - Lifetime US3653365A (en)

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FR6906642A FR2036282A5 (enrdf_load_stackoverflow) 1969-03-10 1969-03-10

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US (1) US3653365A (enrdf_load_stackoverflow)
DE (1) DE2011321A1 (enrdf_load_stackoverflow)
FR (1) FR2036282A5 (enrdf_load_stackoverflow)
GB (1) GB1299632A (enrdf_load_stackoverflow)
SE (1) SE350096B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786789A (en) * 1971-11-15 1974-01-22 Gen Motors Corp Electronic fuel injection system having coarse and fine speed compensation
US3800749A (en) * 1970-08-14 1974-04-02 Sofredi Apparatus for regulating the duration of a square-wave signal in an electronic injection control installation for diesel 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
US3890944A (en) * 1972-10-07 1975-06-24 Bosch Gmbh Robert Electronic ignition system with automatic ignition advancement and retardation
US3896773A (en) * 1972-10-27 1975-07-29 Gen Motors Corp Electronic fuel injection system
US3918417A (en) * 1972-10-27 1975-11-11 Gen Motors Corp Electronic fuel injection system
US3987764A (en) * 1974-10-25 1976-10-26 International Harvester Company Timer means for sequential fuel injection
US4232647A (en) * 1978-11-13 1980-11-11 The Bendix Corporation Control circuit for diesel injection system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD120508A1 (enrdf_load_stackoverflow) * 1975-08-18 1976-06-12 Karl Marx Stadt Automobilbau

Citations (3)

* 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
US2918913A (en) * 1957-06-12 1959-12-29 Weselco Ltd Ignition systems of internal combustion engines
US3429302A (en) * 1966-08-24 1969-02-25 Bosch Gmbh Robert Arrangement for controlling the injection of fuel in engines

Patent Citations (3)

* 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
US2918913A (en) * 1957-06-12 1959-12-29 Weselco Ltd Ignition systems of internal combustion engines
US3429302A (en) * 1966-08-24 1969-02-25 Bosch Gmbh Robert Arrangement for controlling the injection of fuel in engines

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800749A (en) * 1970-08-14 1974-04-02 Sofredi Apparatus for regulating the duration of a square-wave signal in an electronic injection control installation for diesel 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
US3786789A (en) * 1971-11-15 1974-01-22 Gen Motors Corp Electronic fuel injection system having coarse and fine speed compensation
US3890944A (en) * 1972-10-07 1975-06-24 Bosch Gmbh Robert Electronic ignition system with automatic ignition advancement and retardation
US3896773A (en) * 1972-10-27 1975-07-29 Gen Motors Corp Electronic fuel injection system
US3918417A (en) * 1972-10-27 1975-11-11 Gen Motors Corp Electronic fuel injection system
US3987764A (en) * 1974-10-25 1976-10-26 International Harvester Company Timer means for sequential fuel injection
US4232647A (en) * 1978-11-13 1980-11-11 The Bendix Corporation Control circuit for diesel injection system

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GB1299632A (en) 1972-12-13
FR2036282A5 (enrdf_load_stackoverflow) 1970-12-24
SE350096B (enrdf_load_stackoverflow) 1972-10-16

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