EP0046305A2
Expired / Lapsed
EP
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Method and apparatus for controlling an internal combustion engine
Assignee: Denso Corp
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Filing: 1981-08-19
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Granted: —
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Expires: 2001-08-19
Abstract
Abstract A method for controlling an internal combustion engine by controlling the amount of the fuel injection and the ignition timing of the engine using the output signal of a computer which takes the signals produced by the air intake pressure sensor and the rotational speed sensor, calculates the air intake pressure difference APm between the preceding and the present time unit and the rotational speed difference AN between the preceding and the present time unit, calculates the correction value from the calculated APm and AN, and modifies the control value for the engine.
Inventors
- 👤 Mitsunori Takao
- 👤 Toshiaki Mizuno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 08:53
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/26; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P5/1502; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
217 words
A method for controlling an internal combustion engine having a pressure sensor for sensing the air intake pressure of the engine and producing the signal of the sensed air intake pressure, a speed sensor for sensing the rotational speed of the engine and producing the signal of the sensed rotational speed and a computer for carrying out the calculation using said produced signals of the sensed air intake pressure and the sensed rotational speed and producing at least a control value, said produced control value being used for controlling the operation of said engine; wherein the calculation carried out in said computer comprises the steps of: receiving the signals produced by said pressure sensor and said speed sensor successively at the selected interval, calculating the value APm which is the difference between the signal of said pressure sensor in the preceding time unit and the signal of the air pressure sensor in the present time unit and the value N which is the difference between the signal of the said speed sensor in the preceding time unit and the signal of said speed sensor in the present time unit, Calculating the correction value from said calculated value APm and AN, and; modifying the control value for controlling the operation of said engine by said calculated correction value.
Claim 2
Independent Claim
217 words
A method for controlling an internal combustion engine having a pressure sensor for sensing the air intake pressure of the engine and producing the signal of the sensed air intake pressure, a speed sensor for sensing the rotational speed of the engine and producing the signal of the sensed rotational speed and a computer for carrying out the calculation using said produced signals of the sensed air intake pressure and the sensed rotational speed and producing at least a control value, said produced control value being used for controlling the operation of said engine; wherein the calculation carried out in said computer comprises the steps of: receiving the signals produced by said pressure sensor and said speed sensor successively at the selected interval, calculating the value APm which is the difference between the signal of said pressure sensor in the preceding time unit and the signal of the air pressure sensor in the present time unit and the value N which is the difference between the signal of the said speed sensor in the preceding time unit and the signal of said speed sensor in the present time unit, Calculating the correction value from said calculated value APm and AN, and; modifying the control value for controlling the operation of said engine by said calculated correction value.
Claim 3
Dependent Claim
32 words
A method as defined in Claim 1, wherein said control value for controlling the operation of the engine is the amount of the fuel injection and the ignition timing of the engine.
Claim 4
Dependent Claim
96 words
A method as defined in Claim 1, wherein the throttle valve position, the rotational speed of the engine, the air intake pressure, the engine coolant temperature and the air intake temperature are detected, and the status of said engine is determined on the basis of said detected value, and only when the status of said engine determines that said engine is in the idle status or approximately in the idle status after the predetermined length of time from the start of the operation of said engine, said control of operation of said engine is carried out.
Claim 5
Dependent Claim
26 words
A method as defined in Claim 1, wherein said selected interval is the interval determined by a predetermined angle of the crank shaft of the engine.
Claim 6
Independent Claim
20 words
A method as defined in Claim I, wherein said selected interval is the interval of a predetermined length of time.
Claim 7
Dependent Claim
55 words
A method as defined in Claim 1, wherein, when the rotational speed tends to decrease, the correction is carried out in the direction to increase the amount of the fuel injection, while when the rotational speed tends to increase, the correction is carried out in the direction to decrease the amount of the fuel injection.
Claim 8
Dependent Claim
55 words
A method as defined in Claim 1, wherein, when the rotational speed tends to decrease, the correction is carried out in the direction of the advanced angle regarding the ignition instant, while when the rotational speed tends to increase, the correction is carried out in the direction of the delayed angle regarding the ignition timing.
Claim 9
Dependent Claim
57 words
A method as defined in Claim 1, wherein, when the air intake pressure tends to decrease, the correction is carried out in the direction to increase the amount of the fuel injection, while when the air intake pressure tends to increase, the correction is carried out in the direction to decrease the amount of the fuel injection..
Claim 10
Dependent Claim
57 words
A method as defined in Claim 1, wherein, when the air intake pressure tends to decrease, the correction is carried out in the direction of the advanced angle regarding the ignition timing, while when the air intake pressure tends to increase, the correction is carried out in the direction of the delayed angle regarding the ignition timing.
Claim 11
Independent Claim
295 words
An apparatus for controlling an internal combustion engine comprising a pressure sensor for sensing the air intake pressure of the engine and producing the signal of the sensed air intake pressure, a speed sensor for sensing the rotational speed of the engine and producing the signal of the sensed rotational speed, fuel supplying means for supplying a predetermined amount of the fuel to said engine in accordance with a first control signal, ignition means for igniting said engine at a predetermined timing in accordance with a second control signal, and a computer for carrying out the calculation using said produced signals of the sensed air intake pressure and the sensed rotational speed and producing said first control signal for said fuel supplying means and said second control signal for said ignition means, said computer having a central processor unit and a memory unit for storing predetermined programs and constants of the operation of said apparatus, wherein said computer is constructed so as to carry out the steps of: receiving and storing the signals produced by said pressure sensor and said speed sensor successively at the selected interval in accordance with the interruption signal supplied by an interruption commanding unit of said computer, calculating the value 4Pm which is the difference between the signal of said pressure sensor in the preceding time unit and the signal of the pressure sensor in the present time unit and the value AN which is the difference between the signal of the rotational speed sensor in the preceding time unit and the signal of said speed sensor in the present time unit, calculating the correction value from said calculated value APm and AN, and; modifying at least one of said first and second control signals by said calculated correction value.
Claim 12
Independent Claim
295 words
An apparatus for controlling an internal combustion engine comprising a pressure sensor for sensing the air intake pressure of the engine and producing the signal of the sensed air intake pressure, a speed sensor for sensing the rotational speed of the engine and producing the signal of the sensed rotational speed, fuel supplying means for supplying a predetermined amount of the fuel to said engine in accordance with a first control signal, ignition means for igniting said engine at a predetermined timing in accordance with a second control signal, and a computer for carrying out the calculation using said produced signals of the sensed air intake pressure and the sensed rotational speed and producing said first control signal for said fuel supplying means and said second control signal for said ignition means, said computer having a central processor unit and a memory unit for storing predetermined programs and constants of the operation of said apparatus, wherein said computer is constructed so as to carry out the steps of: receiving and storing the signals produced by said pressure sensor and said speed sensor successively at the selected interval in accordance with the interruption signal supplied by an interruption commanding unit of said computer, calculating the value 4Pm which is the difference between the signal of said pressure sensor in the preceding time unit and the signal of the pressure sensor in the present time unit and the value AN which is the difference between the signal of the rotational speed sensor in the preceding time unit and the signal of said speed sensor in the present time unit, calculating the correction value from said calculated value APm and AN, and; modifying at least one of said first and second control signals by said calculated correction value.
Claim 13
Dependent Claim
94 words
An apparatus as defined in Claim 10, wherein said memory unit in said computer stores an interruption routine including a step of calculating the ignition timing and a step of calculating the amount of the fuel injection, said interruption commanding unit produces the interruption signals on the basis of the signal of said speed sensor, and said central processor unit carries out a step of calculating the ignition instant in accordance with said interruption signal and carries out a step of calculating the amount of the fuel injection in accordance with said interruption signal.
References Cited (Backward Citations)
No citation records indexed.
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