US3689753A - Engine control systems - Google Patents

Engine control systems Download PDF

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Publication number
US3689753A
US3689753A US72722A US3689753DA US3689753A US 3689753 A US3689753 A US 3689753A US 72722 A US72722 A US 72722A US 3689753D A US3689753D A US 3689753DA US 3689753 A US3689753 A US 3689753A
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United States
Prior art keywords
engine
memory store
digital signal
signals
digital
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Expired - Lifetime
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US72722A
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English (en)
Inventor
Malcolm Williams
Duncan Barry Hodgson
Michael Murray Bertioli
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.)
ZF International UK Ltd
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Lucas Industries Ltd
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/17—Function evaluation by approximation methods, e.g. inter- or extrapolation, smoothing, least mean square method
    • G06F17/175—Function evaluation by approximation methods, e.g. inter- or extrapolation, smoothing, least mean square method of multidimensional data
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2409—Addressing techniques specially adapted therefor
    • F02D41/2416—Interpolation techniques
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • G06F1/035—Reduction of table size
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
    • F02D2700/02—Controlling by changing the air or fuel supply
    • F02D2700/0217—Controlling by changing the air or fuel supply for mixture compressing engines using liquid fuel
    • F02D2700/022—Controlling the air or the mixture supply as well as the fuel supply
    • F02D2700/0223—Engines with fuel injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
    • F02D2700/02—Controlling by changing the air or fuel supply
    • F02D2700/0217—Controlling by changing the air or fuel supply for mixture compressing engines using liquid fuel
    • F02D2700/0225—Control of air or mixture supply
    • F02D2700/0228—Engines without compressor
    • F02D2700/023—Engines without compressor by means of one throttle device
    • F02D2700/0233—Engines without compressor by means of one throttle device depending on several parameters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • first digital Signal representing a first variable parameter
  • second transducer means for producing a signal representing a second parame' ter.
  • the first parameter changes in steps of X
  • the second parameter in steps of Y.
  • the two signals are fed to a memory store, which produces an output indicating the way in which the engine is to be controlled.
  • at least the first digital signal is varied, for a given value of the first variable parameter, by an amount no greater than X.
  • This invention relates to engine control systems generally, but is particularly concerned with engines used in road vehicles, where it is often required that the engine should be controlled to obtain some desideratum, for example minimum exhaust emission, maximum fuel economy or peak performance.
  • the control will in most cases be of the injection of fuel to the engine, but can, in the case of an engine having a spark ignition system, be of the ignition timing, or even a combination of timing and fuel injection.
  • An engine control system comprises in combination first transducer means producing a first digital signal representing a first variable parameter of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital representing a second variable parameter of the engine, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second'output signals are fed, said memory store being programmed to produce a predetermined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling a characteristic of the engine, and means for varying said first digital signal, fora given value of the first variable parameter, so as to sample different output signals from the memory store.
  • FIG. 1 is a schematic circuit diagram illustrating a memory unit and associated circuits used in the examp
  • FIG. 2 is a truth table indicating possible outputs from the memory unit
  • FIG. 3 illustrates a circuit arrangement for varying each of the digital signals
  • ' F IG. 4 is a circuit diagram of a memory unit used in a second example of the invention.
  • a signal is produced by any convenient transducer 8 representing one of the three variables, engine speed, throttle angle and manifold depression, the signal being produced in the form of a three bit binary word transducers are commercially available which will sense engine speed and produce an electrical output which can be provided in the form of a three bit binary word, and similar transducers are available for giving a three bit binary word representing throttle angle and manifold depression.
  • the two parameters utilized can be any two parameters chosen from the group of three parameters.
  • Another three bit binary word is produced by another transducer 9 which responds to another of the three parameters, and the two words are fed respectively to a pair of decoders 11 and 12.
  • the decoder 11 energizes one of eight input lines 13 of a diode matrix.
  • the decoder 12 energizes one of eight output lines 14 depending on its input signal, and the lines 14 control a switching device 15, which can energize any one of eight groups of five lines 16 each of which crosses each line 13, with connections made where required by diodes for simplicity are shown as dots.
  • One output line 21 is connectible to the first line 16 in each group and four further output lines 21 are connectible to the other four lines 16 in each group, the lines 21 being coupled to a device 22 for controlling the supply of fuel to the engine 23.
  • the dots at the crossing points of the various lines within the device 15 represent electrical connec tions within the device 15 and do not of course represent diodes.
  • the drawing shows only the diodes associated with the lines 13 and the first two groups of input lines 16, but by way of example it'will be seen that, assuming 1 represents the interconnection of two lines 13,16, then if the first group of lines 16 are energized and the eight lines 13 are energized in turn, the following output signals will be obtained: 10000, 00100, 01001, 01 100, 10100, 10010, 11111 and 01000. Similarly, if the group is energized the output as the lines 13 are energized in turn will be 01100, 11001, 10101, 10000, 11001, 01101, 01111 and 11000.
  • the term energised as applied to a group of lines 16 means simply that the group of lines is in operation, that is to say is connected to the device 22.
  • the switching device 15 can, on receipt of an input on a line 14 provide base current to five transistors serving through their collector-emitter paths to connect the appropriate group of five lines 16 to the lines 21.
  • the ignition timing can be controlled using as parameters engine speed and throttle angle.
  • the way in which the quantity of fuel and/or the timing is controlled depends on the purpose of the control system, but the arrangement is particularlyintended for minimizing exhaust emission.
  • the system described provides an empirically determined stepped output signal in response to the two input signals, which are also stepped in value.
  • the inputs are designated a and b and change in steps of X and Y respectively, then considering only three values for each parameter, a truth table for the system can be written the truth table indicating various possible outputs from the memory unit.
  • the value A to l which are determined for the engine under control empirically, may vary substantially in dependence upon the absolute values of the parameters a and b. Because the system is digital, the output signal is incrementally responsive to changes in engine conditions as a parameter changes. Thus, suppose a is constant at value a, but the engine parameter controlling b is varying, but forthe moment has the value b. The output signal is A, but as b increases the output signal stays at A until b +'Y is reached, then changes suddenly to B. For many engines control of this nature is sufficiently fine, but for some engines more accurate control is required.
  • FIG. 3 shows an arrangement in which an analogue voltage produced by a transducer is fed by way of a resistor 31 to a summing amplifier 32, the output from which is fed to a pair of discriminating. circuits 33,34.
  • the circuits 33 and 34 only respond to an input having a predetermined amplitude, and operate respectively in response to positive and negative signals from the amplifier 32.
  • the outputs from the circuits 33 and 3,4 are fed respectively to a pair of AND gates 35 and 36, each of which also receives an input from a clock source 37.
  • the gates 35 and 36 provide outputs to a reversible binary counter 38, the output. from which provides the input to the decoder 11 in FIG. 1.
  • a schmitt trigger circuit 44 the output from which is fed to an integrater'45, which in turn has its output connected through a resistor 46 to the input terminal of the amplifier32.
  • the circuit 44 has two stable conditions, in which it has two different levels of voltage output. In one condition, the integrater 45 produces an increasing voltage which is fed back by way of a resistor 47a to the circuit 44 until the circuit 44 triggers to its alternative state. The integrater 45 then produces a decreasing voltage which again is fed back to the circuit 44 untilv the circuit 44 resumes its first state. The effect of this is that a triangular waveform is produced and fed through the resistor 46 to the amplifier 32.
  • the output from the amplifier 32 is therefore stepped with an amplitude which .is arranged to be equal to the level set by the circuits 33 and 34, which in turn is equal to the voltage level required to step the counter 38 one position.
  • the effect will be that described with reference to FIG. 2.
  • the output from the integrater 45 is also fed to a comparater 47, the output from which is fed to a further integrater 48 connected to the amplifier 32 associated with the other parameters.
  • the comparater 47 detects the waveform produced by the integrater 45 and compares it with an earth potential, and since this output is then integrated by the integrater 48, a waveform is produced which is 90 out of phase with the original waveform, but is identical in frequency.
  • FIG. 1 one form of matrix is shown, it will be appreciated that all that is required is some form of memory store which is designed to produce an output dependent on the two inputs it receives.
  • This memory store can take a variety of forms, and merely by way of example a second form is shown in FIG. 4 This particular form of memory unit is particularly useful in controlling ignition timing.
  • the memory shown in FIG. 4 consists of a number of units 51, 52, 53, it being appreciated that the number of units can be considerably greater than the three shown.
  • Each unit consists of a plurality of parallel resistor and switch combinations, and transducer means 54 operable by one of the parameters, for example engine speed, produces a digital signal acting through a switching device 55 to close one switch in each of the units 51, 52 and 53.
  • the same switch is closed in each of the units, so that for a given value of the parameter, the first switch in each unit may be closed, but as the value increases, the second switch in each unit is closed instead of the first switch, and then the third switch and so on.
  • the outputs from the units 51 to 53 are fed to a unit 56, which contains a plurality of switches, one for each of the units 53, these switches being controlled by a switching device 57 which in turn is controlled by a digital signal produced by transducer means 58 operable by the other parameter, conveniently manifold pressure.
  • the first parameter chooses which switch in each of the units 51 to 53 is closed, and so selects one of a plurality of resistors to be connected to the unit 56.
  • the other parameter closes one only of the switches in the unit 56, to determine which unit 51, 52, 53 is to be operative, and the resistor in use in that unit is then connected to an amplifier 59 which operates a control device 61 for varying the ignition timing.
  • a further specific example is the use of a triangular waveform, with equal rising and falling slopes, with no d.c. component, of amplitude equal to half of the step, applied to an input parameter, and a sawtooth waveform of twice the frequency, with the waveform returning suddenly to zero at points coincident with the peaks of the triangular waveform, and amplitude equal to one half the step, and no d.c. component applied to the other input parameter.
  • each input signal by an amount no greater than the step
  • the memory store must be arranged so that when an input signal is varied, for example while it is in square A in FIG. 2, the memory store will still provide an output when the signal leaves the square. In other words, the memorystore must have a periphery beyond which the signal does not move.
  • An engine control system for controlling the quantity of fuel supplied to the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing engine speed, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the supply of fuel to the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
  • An engine control system for controlling the quantity of fuel supplied to the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the supply of fuel to the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
  • An engine control system for controlling the quantity of fuel supplied to the engine, said system comprising in combination first transducer means for producing a first digital signal representing the engine speed, .said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle, said second digital signal having one of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a predetermined output signal dependent on the values of i the two digital signals, control means operated by the output signal from the memory store for controlling the supply of fuel to the engine, and means for varying one of said digital signals, for a given value of theassociated variable parameter, so as to sample different output signals from the memory store.
  • An engine control system for controlling the ignition timing of the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing engine speed, said second digital signal having one of a number of values changing inv steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the ignition timing of the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter, so as to sample different output signals from the memory store.
  • An engine control system for controlling the ignition timing of the engine, said system comprising in combination first transducer means for producing a first digital signal representing the manifold pressure of the engine, said first digital signal having one of a number of values changing in steps of X, second transducer means producing a second digital signal representing throttle angle,said second digital signal having one 'of a number of values changing in steps of Y, a memory store to which the first and second output signals are fed, said memory store being programmed to produce a pre-determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the ignition timing of the engine, and means for varying one of said digital signals, for a given value of the associated variable parameter so as to sam-, ple different output signals from the memory store.
  • An engine control system for controlling the ignition timing of the engine, said system comprising in combination first transducer means for producing a determined output signal dependent on the values of the two digital signals, control means operated by the output signal from the memory store for controlling the ignition timing of the engine, and means for varying one of said digital signals for a given value of the associated variable parameter, so as to sample different output signals from the memory store.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
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  • Pure & Applied Mathematics (AREA)
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  • Mathematical Physics (AREA)
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  • Combined Controls Of Internal Combustion Engines (AREA)
US72722A 1969-09-23 1970-09-15 Engine control systems Expired - Lifetime US3689753A (en)

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GB4690469 1969-09-23
GB6341069 1969-12-31

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CA (1) CA926497A (enrdf_load_stackoverflow)
DE (1) DE2046543C3 (enrdf_load_stackoverflow)
FR (1) FR2062433A5 (enrdf_load_stackoverflow)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811037A (en) * 1971-07-07 1974-05-14 Nippon Denso Co Digital data corrector
US3835819A (en) * 1972-12-29 1974-09-17 Essex International Inc Digital engine control apparatus and method
US3846625A (en) * 1972-02-21 1974-11-05 Hitachi Ltd Computing device for an interpolation
US3858561A (en) * 1972-09-22 1975-01-07 Nissan Motor Electronic fuel injection control system
US3909601A (en) * 1973-03-21 1975-09-30 Nippon Denso Co Digital type electronic control system
US3911872A (en) * 1972-05-13 1975-10-14 Lucas Electrical Co Ltd Fuel supply systems for internal combustion engines
US3935846A (en) * 1973-08-31 1976-02-03 Daimler-Benz Aktiengesellschaft Installation for the digital-electronic control of inlet, exhaustion and injection valves as well as of the injection in internal combustion engines
US3942491A (en) * 1974-01-07 1976-03-09 Compteurs Schlumberger Electronic ignition system for internal combustion engine
US3964443A (en) * 1973-05-25 1976-06-22 The Bendix Corporation Digital engine control system using DDA schedule generators
US3969614A (en) * 1973-12-12 1976-07-13 Ford Motor Company Method and apparatus for engine control
US3976043A (en) * 1974-12-19 1976-08-24 Texaco Inc. Means and method for controlling the occurrence and the duration of time intervals during which sparks are provided in a multicylinder internal combustion engine
US4000724A (en) * 1973-07-14 1977-01-04 Hughes Microelectronics Limited Ignition arrangements for internal combustion engines
US4034719A (en) * 1973-12-07 1977-07-12 Societe Des Procedes Modernes D'injection Sopromi Control method and apparatus for combustion motors
US4034722A (en) * 1975-02-07 1977-07-12 Hitachi, Ltd. Digital control fuel injection apparatus
US4037577A (en) * 1974-07-08 1977-07-26 Gallo Michael R Auto ignition system
FR2465081A1 (fr) * 1979-09-11 1981-03-20 Bosch Gmbh Robert Installation pour definir des signaux de dosage de carburant
DE3136135A1 (de) * 1980-09-11 1982-04-08 Diesel Kiki Co. Ltd., Tokyo Elektronisch gesteuerte einrichtung zum einspritzen von kraftstoff
US4487187A (en) * 1982-12-10 1984-12-11 Don Petro Electronically controlled fluid floro regulating system
EP0487210A3 (en) * 1990-11-22 1993-02-10 United Kingdom Atomic Energy Authority Hard-wired controller/monitor
US5813374A (en) * 1987-11-12 1998-09-29 Injection Research Specialists, Inc. Two-cycle engine with electronic fuel injection
WO1999041496A1 (de) * 1998-02-11 1999-08-19 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur ermittlung einer zu bestimmenden betriebsgrösse eines kraftfahrzeuges

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GB1353900A (en) * 1970-11-11 1974-05-22 Lucas Industries Ltd Engine controlsystems
GB1370105A (en) * 1971-10-15 1974-10-09 Lucas Electrical Co Ltd Process control apparatus
GB1370104A (en) * 1971-10-15 1974-10-09 Lucas Electrical Co Ltd Process control apparatus
GB1407631A (en) * 1972-02-25 1975-09-24 Lucas Electrical Co Ltd Dynamo electric machines
DE2226949C3 (de) * 1972-06-02 1981-10-01 Robert Bosch Gmbh, 7000 Stuttgart Steuereinrichtung für eine Betriebskenngröße einer Brennkraftmaschine, insbesondere zur Bestimmung eines Kraftstoffzumeßsignals
GB1431773A (en) * 1972-07-15 1976-04-14 Lucas Electrical Ltd Control systems for internal combustion engines
GB1431772A (en) * 1972-07-15 1976-04-14 Lucas Electrical Ltd Control systems for engines
GB1465053A (en) * 1973-02-20 1977-02-23 Lucas Electrical Ltd Automatic transmission control systems
GB1516314A (en) * 1974-06-07 1978-07-05 Lucas Electrical Ltd Fuel injection systems for compression ignition engines
IT1021083B (it) * 1974-07-16 1978-01-30 Alfa Romeo Spa Impianto elettronico di iniezione indiretta di benzina per motori a ciclo otto

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US2925220A (en) * 1954-09-30 1960-02-16 Rca Corp Function generator
US3010656A (en) * 1956-08-04 1961-11-28 Emi Ltd Interpolator devices
US3110802A (en) * 1957-08-03 1963-11-12 Emi Ltd Electrical function generators
US3345505A (en) * 1960-10-24 1967-10-03 Gen Precision Systems Inc Function generator
US3412240A (en) * 1963-02-21 1968-11-19 Gen Precision Systems Inc Linear interpolater
US3472066A (en) * 1968-01-19 1969-10-14 Bell & Howell Co Engine testing apparatus
US3474667A (en) * 1967-10-26 1969-10-28 Harold O Fuchs Engine ignition system performance monitor

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US2925220A (en) * 1954-09-30 1960-02-16 Rca Corp Function generator
US3010656A (en) * 1956-08-04 1961-11-28 Emi Ltd Interpolator devices
US3110802A (en) * 1957-08-03 1963-11-12 Emi Ltd Electrical function generators
US3345505A (en) * 1960-10-24 1967-10-03 Gen Precision Systems Inc Function generator
US3412240A (en) * 1963-02-21 1968-11-19 Gen Precision Systems Inc Linear interpolater
US3474667A (en) * 1967-10-26 1969-10-28 Harold O Fuchs Engine ignition system performance monitor
US3472066A (en) * 1968-01-19 1969-10-14 Bell & Howell Co Engine testing apparatus

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811037A (en) * 1971-07-07 1974-05-14 Nippon Denso Co Digital data corrector
US3846625A (en) * 1972-02-21 1974-11-05 Hitachi Ltd Computing device for an interpolation
US3911872A (en) * 1972-05-13 1975-10-14 Lucas Electrical Co Ltd Fuel supply systems for internal combustion engines
US3858561A (en) * 1972-09-22 1975-01-07 Nissan Motor Electronic fuel injection control system
US3835819A (en) * 1972-12-29 1974-09-17 Essex International Inc Digital engine control apparatus and method
US3909601A (en) * 1973-03-21 1975-09-30 Nippon Denso Co Digital type electronic control system
US3964443A (en) * 1973-05-25 1976-06-22 The Bendix Corporation Digital engine control system using DDA schedule generators
US4000724A (en) * 1973-07-14 1977-01-04 Hughes Microelectronics Limited Ignition arrangements for internal combustion engines
US3935846A (en) * 1973-08-31 1976-02-03 Daimler-Benz Aktiengesellschaft Installation for the digital-electronic control of inlet, exhaustion and injection valves as well as of the injection in internal combustion engines
US4034719A (en) * 1973-12-07 1977-07-12 Societe Des Procedes Modernes D'injection Sopromi Control method and apparatus for combustion motors
US3969614A (en) * 1973-12-12 1976-07-13 Ford Motor Company Method and apparatus for engine control
US3942491A (en) * 1974-01-07 1976-03-09 Compteurs Schlumberger Electronic ignition system for internal combustion engine
US4037577A (en) * 1974-07-08 1977-07-26 Gallo Michael R Auto ignition system
US3976043A (en) * 1974-12-19 1976-08-24 Texaco Inc. Means and method for controlling the occurrence and the duration of time intervals during which sparks are provided in a multicylinder internal combustion engine
US4034722A (en) * 1975-02-07 1977-07-12 Hitachi, Ltd. Digital control fuel injection apparatus
FR2465081A1 (fr) * 1979-09-11 1981-03-20 Bosch Gmbh Robert Installation pour definir des signaux de dosage de carburant
DE3136135A1 (de) * 1980-09-11 1982-04-08 Diesel Kiki Co. Ltd., Tokyo Elektronisch gesteuerte einrichtung zum einspritzen von kraftstoff
US4487187A (en) * 1982-12-10 1984-12-11 Don Petro Electronically controlled fluid floro regulating system
US5813374A (en) * 1987-11-12 1998-09-29 Injection Research Specialists, Inc. Two-cycle engine with electronic fuel injection
EP0487210A3 (en) * 1990-11-22 1993-02-10 United Kingdom Atomic Energy Authority Hard-wired controller/monitor
US5422644A (en) * 1990-11-22 1995-06-06 United Kingdom Atomic Energy Authority Hard-wired controlled/monitor
WO1999041496A1 (de) * 1998-02-11 1999-08-19 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur ermittlung einer zu bestimmenden betriebsgrösse eines kraftfahrzeuges

Also Published As

Publication number Publication date
DE2046543A1 (de) 1971-07-08
DE2046543B2 (de) 1981-01-08
DE2046543C3 (de) 1981-08-13
CA926497A (en) 1973-05-15
FR2062433A5 (enrdf_load_stackoverflow) 1971-06-25

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