US3835819A - Digital engine control apparatus and method - Google Patents

Digital engine control apparatus and method Download PDF

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US3835819A
US3835819A US31934572A US3835819A US 3835819 A US3835819 A US 3835819A US 31934572 A US31934572 A US 31934572A US 3835819 A US3835819 A US 3835819A
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fuel
digital
means
engine
value
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R Anderson
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Lear Corporation EEDS and Interiors
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Essex International Inc
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02PIGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00Advancing or retarding ignition; Control therefor
    • F02P5/04Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145Advancing 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
    • F02P5/15Digital data processing
    • F02P5/1502Digital data processing using one central computing unit
    • F02P5/1512Digital data processing using one central computing unit with particular means concerning an individual cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/24Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2409Addressing techniques specially adapted therefor
    • F02D41/2416Interpolation techniques
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02DCONTROLLING COMBUSTION ENGINES
    • F02D41/00Electrical control of supply of combustible mixture or its constituents
    • F02D41/24Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/40Engine management systems
    • Y02T10/46Engine management systems controlling ignition

Abstract

The disclosure describes digital apparatus and a digital method for operating a multicylinder internal combustion engine having spark plugs that are fired in response to an electrical fire signal and having fuel injectors that are opened to admit a quantity of fuel in response to an electrical fuel signal having a duration determined by the speed of the engine and the position of a throttle controlled by an operator of the engine.

Description

United States Patent Anderson, Jr.

DIGITAL ENGINE CONTROL APPARATUS AND METHOD Robert L. Anderson, Jr., Pittsburgh. Pa.

Essex International, Inc., Fort Wayne, 1nd.

Filed: Dec, 29, 1972 Appl, No.: 319,345

lnventor:

Assignee:

US. Cl.. 123/32 EA, 123/139 AW, 123/119 R, 123/117 R, 23S/l50.21, 340/1725 Int. Cl. F02m 52/00 Field of Search..... 123/32 EA, 119 R, 139 AL, 123/139 R, 139 AW, [40 MC, 140 CC; 235/150, 1502, 150,21; 340/1725 References Cited UNITED STATES PATENTS 1/1959 Reggio 123/140 CC 9/1962 Schmidt 123/139 AL Sept. 17, 1974 3,606,869 9/l97l Hunlzingcr ct a1 H 123/139 AW 3,659,563 5/1972 Monpetit H 123/32 EA 3,689,753 9/1972 Williams et al, 235/15021 FOREIGN PATENTS OR APPLICATIONS 2,004,269 8/1970 Germany 123/32 EA Primary ExaminerLaurence M. Goodridge Attorney, Agent, or FirmMolinare, Allegretti, Newitt & Witcoff [57] ABSTRACT The disclosure describes digital apparatus and a digital method for operating a multicylinder internal combustion engine having spark plugs that are fired in response to an electrical fire signal and having fuel injectors that are opened to admit a quantity of fuel in response to an electrical fuel signal having a duration determined by the speed of the engine and the position of a throttle controlled by an operator of the engme.

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Claims (51)

1. In a fuel system for an internal combustion engine including a source of fuel for a fuel injection means that is opened to admit a predetermined quantity of fuel to the engine in response to an electrical fuel signal, improved apparatus for controlling the fuel signal comprising: first means for generating a first engine condition digital number having a value representing a first operating characteristic of the engine; second means for generating a second engine condition digital number having a value representing a second operating characteristic of the engine; data memory means for storing each of a plurality of fuel digital words representing a plurality of discrete engine fuel requirements; program memory means for storing a plurality of instruction digital words representing a plurality of operating instructions; a program sequencer for initiating the operating instructions in a predetermined order; selecting means responsive to the operating instructions for producing a resultant fuel digital word representing the engine fuel requirement by selecting one or more of the fuel digital words depending on the values of the first and second engine condition digital numbers; means for storing the resultant fuel digital word; means for generating a position signal when the engine is in a predetermined position; means responsive to the position signal for producing said fuel signal at the end of a predetermined operating interval; and means for altering the value of the fuel signal as a function of the value of the resultant fuel digital word so that the proper quantity of fuel is admitted to the engine through the fuel injector means.
2. Apparatus, as claimed in claim 1, wherein the first and second means each comprises an analog to digital converter.
3. Apparatus, as claimed in claim 1, wherein the data memory means comprises means for storing each fuel digital word at a predetermined address that represents a predetermined value of the first engine operating characteristic and a predetermined value of the second engine operating characteristic, and wherein the selecting means comprises: means responsive to the first and second engine condition digital numbers for selecting a plurality of the predetermined addresses, each selected address representing values of the first and second engine operating characteristics that at least approximately correspond to the values of the first and second engine operating characteristics represented by the first and second engine condition digital numbers; and means for deriving from the fuel digital words stored at the selected addresses a single resultant fuel digital word.
4. Apparatus, as claimed in claim 3, wherein the data memory means comprises means for uniquely identifying each predetermined address by a preselected digital first address number proportional to a preselected value of the first operating characteristic and by a preselected digital second address number proportional to a preselected value of the second operating characteristic.
5. Apparatus, as claimed in claim 4, wherein the selecting means comprises: means for comparing the first address numbers with the first engine condition digital number and for comparing the second address numbers with the second engine condition digital number, and for selecting a plurality of selected addresses identified by first and second address numbers thAt approximate the values of the first and second engine condition digital numbers; and means for interpolating between the fuel digital words stored at the selected addresses to produce the resultant fuel digital word.
6. Apparatus, as claimed in claim 1, wherein the selecting means comprises: an arithmetic unit for interpolating between the selected fuel digital words in accordance with the operating instructions.
7. Apparatus, as claimed in claim 1, wherein the means for generating a position signal comprises: a first member mounted to a fixed portion of the engine; a second member mounted to a cyclically moving portion of the engine so that the second member periodically passes adjacent the first member; and means for producing the position signal when the second member passes adjacent the first member.
8. Apparatus, as claimed in claim 1, wherein the means responsive to the position signal comprises: a clock generator for generating clock pulses at a predetermined rate; a counter; means for storing an open-time digital number having a value proportional to said predetermined operating interval; means for loading the open-time digital number into the counter in response to the position signal; means for transmitting clock pulses to the counter so that the counter counts to a predetermined value; and means responsive to the counter for commencing the production of the fuel signal after the counter has counted to the predetermined value.
9. Apparatus, as claimed in claim 1, wherein the means for altering comprises: a clock generator for generating clock pulses at a predetermined rate; a counter; means for loading the resultant fuel digital word into the counter in response to the commencement of the fuel signal; means for transmitting the clock pulses to the counter so that the counter counts to a predetermined value; and means for terminating the fuel signal when the counter has counted to the predetermined value.
10. Apparatus, as claimed in claim 1, wherein the internal combustion engine comprises a first cylinder and a second cylinder, wherein the fuel injection means comprises a first fuel injector for admitting fuel to the first cylinder and a second fuel injector for admitting fuel to the second cylinder, wherein the fuel signal comprises a first current pulse for controlling the first fuel injector and a second current pulse for controlling the second fuel injector, wherein the means responsive to the position signal comprises means for commencing the production of the first current pulse at the end of a first predetermined operating interval and means for commencing the production of the second current pulse at the end of a second predetermined operating interval, and wherein the means for altering comprises means for separately altering the values of the first and second current pulses so that a quantity of fuel proportional to the value of the resultant fuel digital word is separately admitted to the first cylinder through the first fuel injector and to the second cylinder through the second fuel injector.
11. Apparatus, as claimed in claim 10, wherein the means for storing comprises means for storing a first correction digital number and a second correction digital number and wherein the means for altering comprises means for altering the value of the first current pulse so that a quantity of fuel is admitted to the first cylinder proportional to the combined values of the resultant fuel digital word and the first correction digital number and means for altering the value of the second current pulse so that a quantity of fuel is admitted to the second cylinder proportional to the combined values of the resultant fuel digital word and the second correction digital number.
12. In a control system for an internal combustion engine including means for operating a controlled member in response to an electrical control signal, improved apparatus for controlling the control signal comprising: first means for generating a first engine condition digital number having a value representing a first operating characteristic of the engine; second means for generating a second engine condition digital number having a value representing a second operating characteristic of the engine; data memory means for storing each of a plurality of control digital words representing a plurality of control requirements; program memory means for storing a plurality of instruction digital words representing a plurality of operating instructions; a program sequencer for initiating the operating instructions in a predetermined order; selecting means responsive to the operating instructions for producing a resultant control digital word representing the engine control requirement by selecting one or more of the control digital words depending on the values of the first and second engine condition digital numbers; means for storing the resultant control digital word; and means for generating a position signal for controlling the control signal as a function of the value of the resultant control digital word.
13. Apparatus, as claimed in claim 12, wherein the control system comprises an ignition system, wherein the means for operating comprises a means for producing a spark in order to explode a fuel mixture inside the engine, wherein the control signal comprises an electrical fire signal; and wherein the resultant control digital word represents a spark timing requirement of the engine.
14. Apparatus, as claimed in claim 12, wherein the data memory means comprises means for storing each control digital word at a predetermined address that represents a predetermined value of the first engine operating characteristic and a predetermined value of the second engine operating characteristic, and wherein the selecting means comprises: means responsive to the first and second engine condition digital numbers for selecting a plurality of the predetermined addresses, each selected address representing values of the first and second engine operating characteristics that at least approximately correspond to the values of the first and second engine operating characteristics represented by the first and second engine condition digital numbers; and means for deriving from the control digital words stored at the selected addresses a single resultant control digital word.
15. Apparatus, as claimed in claim 14, wherein the data memory means comprises means for uniquely identifying each predetermined address by a preselected digital first address number proportional to a preselected value of the first operating characteristic and by a preselected digital second address number proportional to a preselected value of the second operating characteristic.
16. Apparatus, as claimed in claim 15, wherein the selecting means comprises means for comparing the first address numbers with the first engine condition digital number and for comparing the second address numbers with the second engine condition digital number, and for selecting a plurality of the predetermined addresses identified by first and second address numbers that approximate the values of the first and second engine condition digital numbers; and means for interpolating between the control digital words stored at the selected addresses to produce the resultant control digital word.
17. Apparatus, as claimed in claim 12, wherein the selecting means comprises: an arithmetic unit for interpolating between the selected control digital words in accordance with the operating instructions.
18. Apparatus, as claimed in claim 12, wherein the means for generating a position signal comprises: a first member mounted to a fixed portion of the engine; a second member mounted to a cyclically moving portion of the engine so that the second member periodically passes adjacent the first member; and means for producing the position signal when the second member passes adjacent the first member.
19. Apparatus, as claimed in claim 12, wherein the means responsive to the position signal comprises: a clock generator for generating clock pulses at a predetermined rate; a counter; means for loading the resultant control digital word into the counter in response to the position signal; means for transmitting the clock pulses to the counter so that the counter counts to a predetermined value; and means responsive to the counter for producing the control signal after the counter has counted to the predetermined value.
20. In a system for controlling the operation of an internal combustion engine including a source of fuel for a fuel injection means that is opened to admit a predetermined quantity of fuel to the engine in response to an electrical fuel signal and a spark means for producing a spark cable of igniting the fuel inside the engine in response to a fire signal, improved apparatus for controlling the fuel signal and the timing of the fire signal comprising: first means for generating a first engine condition digital number having a value representing a first operating characteristic of the engine; second means for generating a second engine condition digital number having a value representing a second operating characteristic of the engine; data memory means for storing each of a plurality of fuel digital words representing a plurality of discrete engine fuel requirements and for storing each of a plurality of ignition digital words representing a plurality of ignition timing requirements for the engine; selecting means for producing a resultant fuel digital word for controlling the amount of fuel injected into the engine and a resultant ignition digital word for controlling the ignition timing of the engine by selecting one or more of the fuel digital words and one or more of the ignition digital words depending on the values of the first and second engine condition digital numbers; means for storing the resultant fuel digital word and for storing the resultant ignition digital word; means for generating one or more position signals when the engine is in one or more predetermined positions; first means responsive to one of the one or more position signals for producing said fuel signal at the end of a first predetermined operating interval; means for altering the value of the fuel signal as a function of the value of the resultant fuel digital word so that a proper amount of fuel is admitted to the engine through the fuel injection means; and second means responsive to one of the one or more position signals for producing the fire signal at the end of a second operating interval that is a function of the value of the resultant ignition digital word.
21. Apparatus, as claimed in claim 20, wherein the first operating characteristic comprises engine speed and the second operating characteristic comprises the position of a member controlled by the operator of the engine.
22. Apparatus, as claimed in claim 20, wherein the first and second means each comprises an analog to digital converter.
23. Apparatus, as claimed in claim 20, wherein the data memory means comprises means for storing each fuel digital word and each ignition digital word at a predetermined address that represents a predetermined value of the first engine operating characteristic and a predetermined value of the second engine operating characteristic, and wherein the selecting means comprises: means responsive to the first and second engine condition digital numbers for selecting a plurality of the predetermined addresses, each selected address representing values of the first and second engine operating characteristics that at least approximately correspond to the values of the first and second engine operating characteristics represented by the first and second engine condition digital numbers; and means for deriving from the fuel and ignition digItal words stored at the selected addresses a single resultant fuel digital word and a single resultant ignition digital word.
24. Apparatus, as claimed in claim 23, wherein the data memory means comprises means for uniquely identifying each predetermined address by a preselected digital first address number proportional to a preselected value of the frst operating characteristic and a preselected digital second address number proportional to a preselected value of the second operating characteristic.
25. Apparatus, as claimed in claim 24, wherein the selecting means comprises: means for comparing the first address numbers with the first engine condition digital number and for comparing the second address numbers with the second engine condition digital number, and for selecting a plurality of selected addresses identified by first and second address numbers that approximate the values of the first and second engine condition digital numbers; and means for interpolating between the digital words stored at the selected addresses to produce the resultant fuel digital word and the resultant ignition digital word.
26. Apparatus, as claimed in claim 20, wherein the selecting means comprises: an arithmetic unit for interpolating between the selected fuel and ignition digital words in accordance with the operating instructions.
27. Apparatus, as claimed in claim 20, wherein the means for generating a position signal comprises: a first member mounted to a fixed portion of the engine; a second member mounted to a cylically moving portion of the engine so that the second member periodically passes adjacent the first member; and means for producing the position signal when the second member passes adjacent the first member.
28. Apparatus, as claimed in claim 20, wherein the first means comprises: a clock generator for generating clock pulses at a predetermined rate; a counter; means for storing an open-time digital number having a value proportional to said first operating interval; means for loading the open-time digital number into the counter in response to the position signal; means for transmitting clock pulses to the counter so that the counter counts to a predetermined value; and means responsive to the counter for commencing the production of the fuel signal after the counter has counted to the predetermined value.
29. Apparatus, as claimed in claim 20, wherein the means for altering comprises: a clock generator for generating clock pulses at a predetermined rate; a counter; means for loading the resultant fuel digital word into the counter in response to the commencement of the fuel signal; means for transmitting clock pulses to the counter so that the counter counts to a predetermined value; and means for terminating the fuel signal when the counter has counted to the predetermined value.
30. Apparatus, as claimed in claim 20, wherein the second means comprises: a clock generator for generating clock pulses at a predetermined rate; a counter; means for loading the resultant ignition digital word into the counter in response to the position signal; means for transmitting the clock pulses to the counter so that the counter counts to a predetermined value; and means responsive to the counter for producing the fire signal after the counter has counted to the predetermined value.
31. A method of injecting fuel into an internal combustion engine including a source of fuel for a fuel injection means that is opened to admit a predetermined quantity of fuel to the engine in response to an electrical fuel signal, said method comprising the steps of: storing a plurality of fuel digital words representing a plurality of discrete engine fuel requirements; storing a plurality of instruction digital words representing a plurality of operating instructions; initiating the operating instructions in a predetermined order; generatinG a first engine condition digital number having a value representing a first operating characteristic of the engine; selecting under control of the operating instructions one or more of the fuel digital words depending on the values of the first and second engine condition digital numbers so that each selected fuel digital word at least approximately represents the fuel requirement of the engine; deriving from the one or more selected fuel digital words a resultant fuel digital word representing the engine fuel requirement; storing the resultant fuel digital word; generating a position signal when the engine is in a predetermined position; producing said fuel signal at the end of a predetermined operating interval initiated by the generation of the position signal; and altering the value of the fuel signal as a function of the resultant fuel digital word so that the proper quantity of fuel is admitted to the engine through the fuel injection means.
32. A method, as claimed in claim 31, wherein the step of storing comprises the step of storing each fuel digital word at a predetermined address that represents a predetermined value of the first engine operating characteristic and a predetermined value of the second engine operating characteristic, and wherein the step of selecting comprises the steps of: selecting a plurality of the predetermined addresses, each selected address representing values of the first and second engine operating characteristics that at least approximately correspond to the value of the first and second engine operating characteristics represented by the first and second engine condition digital numbers; and deriving from the fuel digital words stored at the selected addresses a single resultant fuel digital word.
33. A method as claimed in claim 32, wherein the step of storing comprises the step of identifying each predetermined address by a preselected digital first address number proportional to a preselected value of the first operating characteristic and a preselected digital second address number proportional to a preselected value of the second operating characteristic.
34. A method as claimed in claim 33, wherein the step of selecting comprises the steps of: comparing the first address numbers with the first engine condition digital number; comparing the second address numbers with the second engine condition digital number; selecting a plurality of the predetermined addresses identified by first and second address numbers that approximate the values of the first and second engine condition digital numbers; and interpolating between the fuel digital words stored at the selected addresses to produce the resultant fuel digital word.
35. A method, as claimed in claim 31, wherein the internal combustion engine comprises a plurality of cylinders, wherein the fuel injection means comprises a separate fuel injector for each cylinder of the engine, wherein the fuel signal comprises a separate current pulse for independently operating each fuel injector, wherein the step of producing the fuel signal comprises the steps of producing separate current pulses for opening each fuel injector independently of the other fuel injectors, and wherein the step of altering comprises the step of individually altering the value of each current pulse so that a quantity of fuel proportional to the value of the resultant fuel digital word is separately admitted to the engine through each fuel injector.
36. A method, as claimed in claim 35, wherein the step of storing comprises the step of storing a separate correction digital number for each cylinder of the engine, and wherein the step of altering comprises the steps of separately combining the value of the resultant fuel digital word with the value of each correction digital number so that a quantity of fuel is admitted to each cylinder in proportion to the combined values of the resultant fuel digital word and the correction digital number sTored for use with that cylinder.
37. A method of controlling a member of an internal combustion engine that is controllable in response to an electrical control signal, said method comprising the steps of: storing a plurality of control digital words representing a plurality of engine control requirements; storing a plurality of instruction digital words representing a plurality of operating instructions; initiating the operating instructions in a predetermined order; generating a first engine condition digital number having a value representing a first operating characteristic of the engine; generating a second engine condition digital number having a value representing a second operating characteristic of the engine; selecting one or more of the control digital words depending on the values of the first and second engine condition digital numbers so that each selected control digital word at least approximately represents the control requirement of the engine; deriving from the one or more selected control digital words a resultant control digital word representing the engine control requirement; storing the resultant control digital word; generating a position signal when the engine is in a predetermined position; and controlling the control signal in response to the position signal as a function of the value of the resultant control digital word.
38. A method, as claimed in claim 37, wherein the step of storing comprises the step of storing each control digital word at a predetermined address that represents a predetermined value of the first engine operating characteristic and a predetermined value of the second engine operating characteristic, and wherein the step of selecting comprises the steps of: selecting a plurality of the predetermined addresses, each selected address representing values of the first and second engine operating characteristics that at least approximately correspond to the values of the first and second engine operating characteristics represented by the first and second engine condition digital numbers; and deriving from the control digital words stored at the selected addresses a single resultant control digital word.
39. A method, as claimed in claim 38, wherein the step of storing comprises the step of identifying each predetermined address by a preselected digital first address number proportional to a preselected value of the first operating characteristic and a preselected digital second address number proportional to a preselected value of the second operating characteristic.
40. A method, as claimed in claim 39, wherein the step of selecting comprises the steps of: comparing the first address numbers with the first engine condition digital number; comparing the second address numbers with the second engine condition digital number; selecting a plurality of the predetermined addresses identified by first and second address numbers that approximate the values of the first and second engine condition digital numbers; and interpolating between the control digital words stored at the selected addresses to produce the resultant digital word.
41. A method, as claimed in claim 37, wherein the controllable member is a means for producing a spark capable of exploding a fuel mixture inside the engine, wherein each control digital word represents an ignition time at which a spark must be provided, and wherein the resultant control digital word represents a spark timing requirement of the engine.
42. In a control system for an internal combustion engine comprising first control means for controlling the operation of a first cylinder of the engine in response to a first control signal and second control means for controlling the operation of a second cylinder of the engine in response to a second control signal, improved apparatus for individually controlling the first and second control means comprising: means for generating a control diGital word having a value representing a control requirement of the engine at the predetermined operating condition; means for storing the control digital word; means for storing a first correction digital number having a value representing a control requirement characteristic of the first cylinder; means for storing a second correction digital number having a value representing a control requirement characteristic of the second cylinder; means for initiating the production of the first control signal and the second control signal; means for altering the duration of the first control signal so that the operation of the first control means is controlled in proportion to the combined values of the control digital word and the first correction digital number and for altering the duration of the second control signal so that the operation of the second control means is controlled in proportion to the combined values of the control digital word and the second correction digital number.
43. Apparatus, as claimed in claim 42, wherein the means for storing the control digital word comprises a first register, wherein the means for storing the first correction digital number comprises a second register and wherein the means for storing the second correction digital number comprises a third register.
44. Apparatus, as claimed in claim 42, wherein the means for altering comprises: means for adding the value of the first correction digital number to the value of the control digital word to produce a first corrected control digital word and for adding the value of the second correction digital number to the value of the control digital word to produce a second corrected control digital word; a clock generator for generating clock pulses at a predetermined rate; counting means; means for loading the first corrected control digital word into the counting means and for producing a first output signal when the counting means has been stepped by the clock pulses to a predetermined value; means responsive to the first output signal for terminating the first control signal; means for loading the second corrected control digital word into the counting means and for producing a second output signal when the counting means has been stepped by the clock pulses to a predetermined value; and means for terminating the second control signal in response to the second output signal.
45. Apparatus, as claimed in claim 42, wherein the control system comprises a fuel system, wherein the first control means comprises a first fuel injection means for admitting fuel into the first cylinder, wherein the second control means comprises a second fuel injection means for admitting fuel into the second cylinder and wherein the control requirements each comprise a fuel requirement of a cylinder.
46. A method of regulating a control function of an internal combustion engine so that the engine operates at a predetermined value of an engine operating characteristic, the method comprising the steps of: storing a target digital number representing the predetermined value of the engine operating characteristic; converting the value of the engine operating characteristic at a first point in time into a first test digital number; converting the value of the engine operating characteristic at a second point in time later than the first point in time into a second test digital number; producing a first logic signal if the second test digital number is greater in value than the target digital number; producing a second logic signal if the second test digital number is less in value than the target digital number; producing a third logic signal if the second test digital number is greater in value than the first test digital number; producing a fourth logic signal if the second test digital number is less in value than the first test digital number; storing a delta digital number representing a small change iN the value of the control function; changing the control function in an amount proportional to the value of the delta digital number in response to the first and fourth logic signals; changing the control function in an amount proportional to the value of the delta digital number in response to the second and third logic signals; changing the control function in an amount proportional to the inverse of the value of the delta digital number in response to the first and third logic signals; and changing the control function in an amount proportional to the inverse of the value of the delta digital number in response to the second and fourth logic signals.
47. A method, as claimed in claim 41, wherein the control function is the quantity of fuel supplied to the engine, wherein the engine operating characteristic is engine speed, and wherein the delta digital number represents a small change in the quantity of fuel normally provided to the engine.
48. A method for controlling the operation of an internal combustion engine including a source of fuel for a fuel injection means to admit a predetermined quantity of fuel to the engine in response to an electricl fuel signal and spark means for producing a spark capable of igniting the fuel inside the engine in response to a fire signal, said method comprising the steps of: generating a first engine condition digital number having a value representing a first operating characteristic of the engine; generating a second engine condition digital number having a value representing a second operating characteristic of the engine; storing a plurality of fuel digital words and a plurality of ignition digital words in pairs, each pair comprising a fuel digital word and an ignition digital word stored at a single predetermined address that represents a predetermined value of the first engine condition digital number and a predetermined value of the second engine digital number, said fuel digital words representing a plurality of engine fuel requirements and said ignition digital words representing a plurality of discrete spark requirements timing requirements of the engine; selecting one or more of the predetermined addresses depending on the values of the first and second condition digital numbers; deriving from the one or more fuel digital words and ignition digital words stored at the one or more selected addresses, a resultant fuel digital word and a resultant ignition digital word; storing the resultant fuel digital word; storing the resultant ignition digital word; generating a position signal when the engine is in a predetermined position; producing said fuel signal at the end of a predetermined operating interval initiated by the generation of the position signal; altering the value of the fuel signal as a function of the resultant fuel digital word so that the proper quantity of fuel is admitted to the engine through the fuel injection means; and generating the fire signal at the end of a variable operating interval initiated by the generation of the position signal, the operating interval being varied as a function of the value of the resultant ignition digital word.
49. A method, as claimed in claim 48, wherein the first operating characteristic comprises engine speed and the second operating characteristic comprises the position of a member controlled by an operator of the engine.
50. A method, as claimed in claim 48, wherein the step of storing comprises the step of identifying each predetermined address by a preselected digital first address number proportional to a preselected value of the first operating characteristic and a preselected digital second address number proportional to a preselected value of the second operating characteristic.
51. A method, as claimed in claim 50, wherein the step of selecting comprises and steps of: comparing the first address numbers with the first engine condition digital number; comparing thE second address numbers with the second engine condition digital number; selecting a plurality of a predetermined addresses identified by first and second address numbers that approximate the value of the first and second engine condition digital numbers; and interpolating between the fuel and ignition digital words stored at the selected addresses to produce the resultant fuel digital word and the resultant ignition digital word.
US3835819A 1972-12-29 1972-12-29 Digital engine control apparatus and method Expired - Lifetime US3835819A (en)

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US3835819A US3835819A (en) 1972-12-29 1972-12-29 Digital engine control apparatus and method

Applications Claiming Priority (11)

Application Number Priority Date Filing Date Title
US3835819A US3835819A (en) 1972-12-29 1972-12-29 Digital engine control apparatus and method
GB4128975A GB1429625A (en) 1972-12-29 1973-05-16 Digital engine control emthod
GB1526275A GB1429624A (en) 1972-12-29 1973-05-16 Digital engine control apparatus and method
GB2335173A GB1429961A (en) 1972-12-29 1973-05-16 Digital engine control apparatus and method
JP6771273A JPS4996132A (en) 1972-12-29 1973-06-15
CA 175710 CA1006941A (en) 1972-12-29 1973-07-05 Digital engine control apparatus and method
FR7332796A FR2212494B1 (en) 1972-12-29 1973-09-12
DE19732349670 DE2349670A1 (en) 1972-12-29 1973-10-03 Apparatus and method for controlling an internal combustion engine
CA 219557 CA1008538A (en) 1972-12-29 1975-02-07 Digital engine control apparatus and method
CA 219556 CA1008537A (en) 1972-12-29 1975-02-07 Digital engine control apparatus and method
CA 219555 CA1008536A (en) 1972-12-29 1975-02-07 Digital engine control apparatus and method

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US3909601A (en) * 1973-03-21 1975-09-30 Nippon Denso Co Digital type electronic control system
US3930483A (en) * 1974-06-24 1976-01-06 Ford Motor Company Apparatus for supplying fuel to a fuel-injected engine
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
US3998193A (en) * 1971-12-21 1976-12-21 Joseph Lucas (Electrical) Limited Spark ignition systems
US4009699A (en) * 1976-01-19 1977-03-01 General Motors Corporation Digital ignition spark timing angle control with read only memory
US4013875A (en) * 1974-01-11 1977-03-22 Mcglynn Daniel R Vehicle operation control system
US4032755A (en) * 1974-06-18 1977-06-28 The Lucas Electrical Company Limited Process control apparatus
US4034722A (en) * 1975-02-07 1977-07-12 Hitachi, Ltd. Digital control fuel injection apparatus
US4047507A (en) * 1974-05-07 1977-09-13 Nippondenso Co., Ltd. Fuel economizing system
US4052967A (en) * 1976-06-24 1977-10-11 General Motors Corporation Digital electronic ignition spark timing system
US4073270A (en) * 1975-07-02 1978-02-14 Nippondenso Co., Ltd. Electronically-controlled fuel injection system
US4100891A (en) * 1974-08-07 1978-07-18 Rockwell International Corporation Electronic fuel injection control system
US4122811A (en) * 1977-07-25 1978-10-31 General Motors Corporation Digital closed loop fuel control system
US4134368A (en) * 1977-06-06 1979-01-16 Edelbrock-Hadley Corporation Fuel injection control system
US4163282A (en) * 1976-09-24 1979-07-31 Nippondenso Co., Ltd. Electrical control method and apparatus for combustion engines
DE2808731A1 (en) * 1978-03-01 1979-09-06 Bosch Gmbh Robert Method for operating a fuel injection system and fuel injection system
US4176629A (en) * 1976-12-10 1979-12-04 Nippon Soken, Inc. Electric control method for fuel injection and ignition timing
FR2431610A1 (en) * 1978-07-21 1980-02-15 Hitachi Ltd engine fuel supply control apparatus
DE2932059A1 (en) * 1978-08-07 1980-02-28 Hitachi Ltd Electronic machine control device
FR2434933A1 (en) * 1978-07-26 1980-03-28 Hitachi Ltd control apparatus of an internal combustion engine
US4201159A (en) * 1977-03-23 1980-05-06 Nippon Soken, Inc. Electronic control method and apparatus for combustion engines
US4205376A (en) * 1977-04-15 1980-05-27 Nippondenso Co., Ltd. Method and apparatus for initializing vehicle-mounted computers
US4209829A (en) * 1977-03-15 1980-06-24 Regie Nationale Des Usines Renault Digital controller for fuel injection with microcomputer
US4220125A (en) * 1977-05-27 1980-09-02 Nippon Soken, Inc. Ignition timing control system for internal combustion engines
US4255789A (en) * 1978-02-27 1981-03-10 The Bendix Corporation Microprocessor-based electronic engine control system
FR2465082A1 (en) * 1979-09-10 1981-03-20 Alfa Romeo Spa control and regulation arrangement of the fuel supply device of an internal combustion engine
US4258684A (en) * 1978-05-16 1981-03-31 The Bendix Corporation Digital ignition timing controller
US4298939A (en) * 1978-10-30 1981-11-03 Phillips Petroleum Company Method and apparatus for applying a regulated voltage
US4313412A (en) * 1979-03-19 1982-02-02 Nissan Motor Company Limited Fuel supply control system
US4366793A (en) * 1980-10-24 1983-01-04 Coles Donald K Internal combustion engine
EP0070723A2 (en) * 1981-07-20 1983-01-26 Ford Motor Company Limited Method for developing control values for controlling the performance of internal combustion engines
US4372269A (en) * 1980-10-24 1983-02-08 Coles Donald K Internal combustion engine
US4376429A (en) * 1981-06-23 1983-03-15 Ford Motor Company Adaptive cylinder by cylinder knock retard control
US4377995A (en) * 1979-06-28 1983-03-29 Volkswagenwerk Aktiengesellschaft Method and arrangement for operation of an internal combustion engine of a vehicle
US4379332A (en) * 1978-09-25 1983-04-05 The Bendix Corporation Electronic fuel injection control system for an internal combustion engine
US4393696A (en) * 1981-07-20 1983-07-19 Ford Motor Company Method for generating energy output signal
EP0084610A2 (en) * 1981-10-30 1983-08-03 Hitachi, Ltd. Method for the acquisition of input data for motorcar equipment control
US4397282A (en) * 1974-10-25 1983-08-09 The Lucas Electrical Company Limited Fuel injection systems for internal combustion engines
US4402057A (en) * 1978-01-11 1983-08-30 Nissan Motor Company, Limited Method of and apparatus for ensuring correct operation of a microcomputer in the event of power outage
US4402294A (en) * 1982-01-28 1983-09-06 General Motors Corporation Fuel injection system having fuel injector calibration
US4418672A (en) * 1980-03-06 1983-12-06 Robert Bosch Gmbh Fuel supply system
US4443852A (en) * 1979-11-29 1984-04-17 Diesel Kiki Co., Ltd. Control apparatus for internal combustion engine
US4493303A (en) * 1983-04-04 1985-01-15 Mack Trucks, Inc. Engine control
US4501248A (en) * 1980-03-13 1985-02-26 Robert Bosch Gmbh Apparatus for ascertaining control variables in an internal combustion engine
US4523284A (en) * 1979-12-25 1985-06-11 Hitachi, Ltd. Method of controlling internal combustion engine
US4566068A (en) * 1981-11-26 1986-01-21 Diesel Kiki Co., Ltd. Characteristic signal generator for an electronically controlled fuel injection pump
US4715012A (en) * 1980-10-15 1987-12-22 Massey-Ferguson Services N.V. Electronic tractor control
FR2610993A1 (en) * 1987-02-13 1988-08-19 Teleflex Lionel Dupont Method and device for controlling fuel injection into a multi-cylinder heat engine
US4790277A (en) * 1987-06-03 1988-12-13 Ford Motor Company Self-adjusting fuel injection system
US5078083A (en) * 1989-10-17 1992-01-07 Nylok Fastener Corporation Method and apparatus for coating fasteners
US6172428B1 (en) * 1998-12-30 2001-01-09 Westwood Corporation Digital control system and method for generator sets
US6173692B1 (en) 1997-06-20 2001-01-16 Outboard Marine Corporation Time delay ignition circuit for an internal combustion engine
US6718253B1 (en) * 1993-04-29 2004-04-06 Siemens Aktiengesellschaft Method for forming an actuating variable
US20080184962A1 (en) * 2005-03-21 2008-08-07 Thomas Pauer Fuel Injection Apparatus For A Multicylinder Internal Combustion Engine
US20090031992A1 (en) * 2007-04-24 2009-02-05 Lycoming Engines, A Division Of Avco Corporation Fuel injector mounting assembly for an aircraft engine fuel delivery system
US20110066781A1 (en) * 2008-03-25 2011-03-17 Mtu Friedrichshafen Gmbh Method for assigning adresses to injectors
US20120017873A1 (en) * 2006-12-14 2012-01-26 Sp3H Spark advance adjustment

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JPS50133340A (en) * 1974-04-10 1975-10-22
DE2551639A1 (en) * 1975-11-18 1977-06-02 Bosch Gmbh Robert Apparatus for determining the duration of internal combustion engines of the injection control commands at a fuel injection system
DE2732781C3 (en) * 1977-07-20 1995-04-06 Bosch Gmbh Robert Means for controlling operating parameters dependent and repetitive processes
DE2840706C2 (en) * 1977-09-21 1985-09-12 Hitachi, Ltd., Tokio/Tokyo, Jp
JPS623304B2 (en) * 1977-10-19 1987-01-24 Hitachi Ltd
JPS6224616B2 (en) * 1977-10-19 1987-05-29 Hitachi Ltd
JPS623303B2 (en) * 1977-10-19 1987-01-24 Hitachi Ltd
DE2807499A1 (en) * 1978-02-22 1979-08-23 Bosch Gmbh Robert engine-ignition circuit for
GB2058909B (en) * 1979-09-10 1983-05-18 Alfa Romeo Spa System for controlling the ignition timing of an internal combustion engine
JPS5853649A (en) * 1981-09-24 1983-03-30 Mitsubishi Electric Corp Controller of internal-combustion engine
JPH0260858B2 (en) * 1982-04-14 1990-12-18 Nissan Motor
JPS58214655A (en) * 1982-06-07 1983-12-13 Yanmar Diesel Engine Co Ltd Controller for gas fuel engine
GB2136164B (en) * 1983-03-01 1987-03-25 Aisin Seiki Automobile speed control systems
JPH029173B2 (en) * 1983-06-22 1990-02-28 Honda Motor Co Ltd
JPS6361737A (en) * 1986-09-01 1988-03-17 Hitachi Ltd Fuel control device

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Cited By (68)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3998193A (en) * 1971-12-21 1976-12-21 Joseph Lucas (Electrical) Limited Spark ignition systems
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
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
US4013875A (en) * 1974-01-11 1977-03-22 Mcglynn Daniel R Vehicle operation control system
US4047507A (en) * 1974-05-07 1977-09-13 Nippondenso Co., Ltd. Fuel economizing system
US4032755A (en) * 1974-06-18 1977-06-28 The Lucas Electrical Company Limited Process control apparatus
US3930483A (en) * 1974-06-24 1976-01-06 Ford Motor Company Apparatus for supplying fuel to a fuel-injected engine
US4100891A (en) * 1974-08-07 1978-07-18 Rockwell International Corporation Electronic fuel injection control system
US4397282A (en) * 1974-10-25 1983-08-09 The Lucas Electrical Company Limited Fuel injection systems for internal combustion engines
US4034722A (en) * 1975-02-07 1977-07-12 Hitachi, Ltd. Digital control fuel injection apparatus
US4073270A (en) * 1975-07-02 1978-02-14 Nippondenso Co., Ltd. Electronically-controlled fuel injection system
US4009699A (en) * 1976-01-19 1977-03-01 General Motors Corporation Digital ignition spark timing angle control with read only memory
US4052967A (en) * 1976-06-24 1977-10-11 General Motors Corporation Digital electronic ignition spark timing system
US4163282A (en) * 1976-09-24 1979-07-31 Nippondenso Co., Ltd. Electrical control method and apparatus for combustion engines
US4176629A (en) * 1976-12-10 1979-12-04 Nippon Soken, Inc. Electric control method for fuel injection and ignition timing
US4209829A (en) * 1977-03-15 1980-06-24 Regie Nationale Des Usines Renault Digital controller for fuel injection with microcomputer
US4201159A (en) * 1977-03-23 1980-05-06 Nippon Soken, Inc. Electronic control method and apparatus for combustion engines
US4205376A (en) * 1977-04-15 1980-05-27 Nippondenso Co., Ltd. Method and apparatus for initializing vehicle-mounted computers
US4220125A (en) * 1977-05-27 1980-09-02 Nippon Soken, Inc. Ignition timing control system for internal combustion engines
US4134368A (en) * 1977-06-06 1979-01-16 Edelbrock-Hadley Corporation Fuel injection control system
US4122811A (en) * 1977-07-25 1978-10-31 General Motors Corporation Digital closed loop fuel control system
US4402057A (en) * 1978-01-11 1983-08-30 Nissan Motor Company, Limited Method of and apparatus for ensuring correct operation of a microcomputer in the event of power outage
US4255789A (en) * 1978-02-27 1981-03-10 The Bendix Corporation Microprocessor-based electronic engine control system
DE2808731A1 (en) * 1978-03-01 1979-09-06 Bosch Gmbh Robert Method for operating a fuel injection system and fuel injection system
US4258684A (en) * 1978-05-16 1981-03-31 The Bendix Corporation Digital ignition timing controller
FR2431610A1 (en) * 1978-07-21 1980-02-15 Hitachi Ltd engine fuel supply control apparatus
US4301780A (en) * 1978-07-21 1981-11-24 Hitachi, Ltd. Fuel injection control apparatus for internal combustion engine
US4296722A (en) * 1978-07-26 1981-10-27 Hitachi, Ltd. Control apparatus for an internal combustion engine
FR2434933A1 (en) * 1978-07-26 1980-03-28 Hitachi Ltd control apparatus of an internal combustion engine
DE2932059A1 (en) * 1978-08-07 1980-02-28 Hitachi Ltd Electronic machine control device
US4379332A (en) * 1978-09-25 1983-04-05 The Bendix Corporation Electronic fuel injection control system for an internal combustion engine
US4298939A (en) * 1978-10-30 1981-11-03 Phillips Petroleum Company Method and apparatus for applying a regulated voltage
US4313412A (en) * 1979-03-19 1982-02-02 Nissan Motor Company Limited Fuel supply control system
US4455983A (en) * 1979-06-28 1984-06-26 Volkswagenwerk Aktiengesellschaft Method and arrangement for operation of an internal combustion engine of a vehicle
US4377995A (en) * 1979-06-28 1983-03-29 Volkswagenwerk Aktiengesellschaft Method and arrangement for operation of an internal combustion engine of a vehicle
FR2465082A1 (en) * 1979-09-10 1981-03-20 Alfa Romeo Spa control and regulation arrangement of the fuel supply device of an internal combustion engine
US4443852A (en) * 1979-11-29 1984-04-17 Diesel Kiki Co., Ltd. Control apparatus for internal combustion engine
US4523284A (en) * 1979-12-25 1985-06-11 Hitachi, Ltd. Method of controlling internal combustion engine
US4418672A (en) * 1980-03-06 1983-12-06 Robert Bosch Gmbh Fuel supply system
US4501248A (en) * 1980-03-13 1985-02-26 Robert Bosch Gmbh Apparatus for ascertaining control variables in an internal combustion engine
US4715012A (en) * 1980-10-15 1987-12-22 Massey-Ferguson Services N.V. Electronic tractor control
US4372269A (en) * 1980-10-24 1983-02-08 Coles Donald K Internal combustion engine
US4366793A (en) * 1980-10-24 1983-01-04 Coles Donald K Internal combustion engine
US4376429A (en) * 1981-06-23 1983-03-15 Ford Motor Company Adaptive cylinder by cylinder knock retard control
US4393696A (en) * 1981-07-20 1983-07-19 Ford Motor Company Method for generating energy output signal
EP0070723A3 (en) * 1981-07-20 1984-02-01 Ford Motor Company Limited Method for generating a table of engine calibration control values
EP0070723A2 (en) * 1981-07-20 1983-01-26 Ford Motor Company Limited Method for developing control values for controlling the performance of internal combustion engines
US4383441A (en) * 1981-07-20 1983-05-17 Ford Motor Company Method for generating a table of engine calibration control values
EP0084610A3 (en) * 1981-10-30 1983-09-07 Hitachi, Ltd. Method for the acquisition of input data for motorcar equipments control
EP0084610A2 (en) * 1981-10-30 1983-08-03 Hitachi, Ltd. Method for the acquisition of input data for motorcar equipment control
US4566068A (en) * 1981-11-26 1986-01-21 Diesel Kiki Co., Ltd. Characteristic signal generator for an electronically controlled fuel injection pump
US4402294A (en) * 1982-01-28 1983-09-06 General Motors Corporation Fuel injection system having fuel injector calibration
US4493303A (en) * 1983-04-04 1985-01-15 Mack Trucks, Inc. Engine control
FR2610993A1 (en) * 1987-02-13 1988-08-19 Teleflex Lionel Dupont Method and device for controlling fuel injection into a multi-cylinder heat engine
US4790277A (en) * 1987-06-03 1988-12-13 Ford Motor Company Self-adjusting fuel injection system
US5078083A (en) * 1989-10-17 1992-01-07 Nylok Fastener Corporation Method and apparatus for coating fasteners
US6718253B1 (en) * 1993-04-29 2004-04-06 Siemens Aktiengesellschaft Method for forming an actuating variable
US6173692B1 (en) 1997-06-20 2001-01-16 Outboard Marine Corporation Time delay ignition circuit for an internal combustion engine
US6172428B1 (en) * 1998-12-30 2001-01-09 Westwood Corporation Digital control system and method for generator sets
US20080184962A1 (en) * 2005-03-21 2008-08-07 Thomas Pauer Fuel Injection Apparatus For A Multicylinder Internal Combustion Engine
US7588016B2 (en) * 2005-03-21 2009-09-15 Robert Bosch Gmbh Fuel injection apparatus for a multicylinder internal combustion engine
US20120017873A1 (en) * 2006-12-14 2012-01-26 Sp3H Spark advance adjustment
US20090031992A1 (en) * 2007-04-24 2009-02-05 Lycoming Engines, A Division Of Avco Corporation Fuel injector mounting assembly for an aircraft engine fuel delivery system
US7802560B2 (en) * 2007-04-24 2010-09-28 Lycoming Engines, A Division Of Avco Corporation Fuel injector mounting assembly for an aircraft engine fuel delivery system
US20110066781A1 (en) * 2008-03-25 2011-03-17 Mtu Friedrichshafen Gmbh Method for assigning adresses to injectors
US8381704B2 (en) * 2008-03-25 2013-02-26 Mtu Friedrichshafen Gmbh Method for assigning addresses to injectors

Also Published As

Publication number Publication date Type
CA1006941A (en) 1977-03-15 grant
CA1006941A1 (en) grant
DE2349670A1 (en) 1974-07-04 application
JPS4996132A (en) 1974-09-11 application
FR2212494A1 (en) 1974-07-26 application
GB1429625A (en) 1976-03-24 application
GB1429624A (en) 1976-03-24 application
FR2212494B1 (en) 1978-11-10 grant
GB1429961A (en) 1976-03-31 application

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