Method and system for operating a power-producing machine at maximum torque under varying operating conditions
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02P-005/08
F02B-005/02
G05B-013/02
출원번호
US-0159435
(1980-06-13)
우선권정보
JP-0110939 (1979-08-29); JP-0014605 (1980-02-07)
발명자
/ 주소
Ninomiya, Masakazu
Suzuki, Atsushi
Hirabayashi, Yuji
출원인 / 주소
Nippondenso Co., Ltd.
대리인 / 주소
Cushman, Darby & Cushman
인용정보
피인용 횟수 :
23인용 특허 :
7
초록▼
Spark ignition timing of an internal combustion engine is oscillated on opposite sides of the setting of a variable reference timing and the resultant engine speed is detected in at least three successive phases of the oscillation and stored in respective memories. The contents of the memories are c
Spark ignition timing of an internal combustion engine is oscillated on opposite sides of the setting of a variable reference timing and the resultant engine speed is detected in at least three successive phases of the oscillation and stored in respective memories. The contents of the memories are compared with each other to detect whether they establish one of two predetermined relationships which occur exclusively in the absence of a manual command input to the engine. The variable reference setting is adjusted by a predetermined amount in a specified direction in response to the established relationship. The process is repeated so that the reference setting approaches an optimum advance angle at which the engine output torque is at a maximum. When the reference setting is at or near the optimum point or when a manual command engine input is present, the registered engine speed values establish a relationship other than the predetermined ones and the reference setting is not adjusted.
대표청구항▼
1. A method of operating a powerproducing machine at maximum output torque under varying operating conditions, said machine having an adjustable input machine variable the setting of which controls the output torque, said method comprising: oscillating the setting of the input variable by a prede
1. A method of operating a powerproducing machine at maximum output torque under varying operating conditions, said machine having an adjustable input machine variable the setting of which controls the output torque, said method comprising: oscillating the setting of the input variable by a predetermined amount with respect to a variable reference setting; sensing an output variable representative of said output torque during at least three successive phases of the oscillation; sensing whether the detected output variables establish one of first and second sequential relationships of a plurality of possible sequential relationships indicating that said variable reference setting is on one of a first and second sides, respectively, of an optimum position; and adjusting said variable reference setting toward said optimum position exclusively in response to one of the sensed first and second sequential relationships. 2. The method of claim 1, wherein said step of oscillating the setting of the input variable comprises varying the input variable at least three settings in successive phases of a recurrent cycle. 3. The method of claim 2, wherein said step of sensing the variable comprises sensing during a short interval immediately prior to a transition from one phase to another of said recurrent cycle. 4. A method of operating an internal combustion engine at maximum output torque under varying operating conditions, said engine having an output shaft and an adjustable input engine variable the setting of which controls the output torque, the method comprising: oscillating the setting of the input variable by a predetermined amount with respect to a variable reference setting; sensing an output variable representative of said output torque during at least three successive phases of the oscillation; sensing whether the detected output variables establish one of first and second sequential relationships of a plurality of possible sequential relationships indicating that said variable reference is on one of a first and second sides, respectively, of an optimum position; and adjusting said variable reference setting toward said optimum position exclusively in response to one of the sensed first and second sequential relationships. 5. The method of claim 4, wherein said step of oscillating the setting of the input variable comprises varying the input variable at least three settings in successive phases of a recurrent cycle. 6. The method of claim 5, wherein said step of sensing the output variable comprises sensing during a short interval immediately prior to a transition from one phase to another of said recurrent cycle. 7. The method of claim 6, wherein said internal combustion engine is of a multiple cylinder type, and wherein said interval is an integral multiple of the time required to complete a combustion in each of the cylinders, said integral multiple being an integral multiple of the number of said cylinders. 8. The method of claim 4, 5, 6 or 7, wherein said input engine variable is representative of a spark ignition advance angle with respect to the top dead center of each cylinder. 9. The method of claim 8, wherein said output variable is representative of the speed of revolution of said output shaft. 10. A method of operating an internal combustion engine at maximum output torque under varying operating conditions, said engine having an output shaft and an adjustable spark ignition variable the setting of which controls the output torque, said method comprising the steps of: (a) reading a reference spark ignition datum from a memory; (b) repeatedly causing ignitions to occur a predetermined number of times at a reference timing based on the datum read from said memory; (c) storing a datum representative of the speed of revolution of said output shaft during an interval in which said ignitions occurred; (d) generating an advance spark ignition datum representing an ignition timing which is advanced with respect to said reference timing by a predetermined amount; (e) repeatedly causing ignitions to occur at advanced timing said predetermined number of times in accordance with said advance ignition datum generated in the step (d); (f) storing a datum representative of the speed of revolution of said output shaft during an interval in which said ignitions occurred at said advanced ignition timing; (g) generating a retard spark ignition datum representing an ignition timing which is retarded with respect to said reference timing by a predetermined amount; (h) repeatedly causing ignitions to occur at retarded timing said predetermined number of times in accordance with said retard spark ignition datum generated in the step (g); (i) storing a datum representative of the speed of revolution of said output shaft during an interval in which the ignitions occurred at said retarded timing; (j) comparing the data stored in the steps (c), (f) and (i) with each other to detect whether said compared data establish one of first and second sequential relationships of a plurality of possible sequential relationships indicating that said reference timing is on one of the advance and retard sides, respectively, of an optimum position; (k) varying said reference spark ignition datum of the step (a) in a first direction only when said first sequential relationship is detected and in a second direction only when said second sequential relationship is detected; and (l) repeating the steps (a) to (k). 11. The method of claim 10, wherein the step (a) comprises: (A) generating a first signal representative of the speed of the revolution of said output shaft; (B) generating a second signal representative of the speed of revolution of said output shaft; and (C) reading a datum representative of a reference advance angle as a function of said first and second signals from said memory. 12. The method of claim 10 or 11, wherein said internal combustion engine is of a multiple cylinder type, and wherein the interval of the step (c) is equal to an integral multiple of the time required to complete a combustion in each of the cylinders, said integral multiple bieng an integral multiple of the number of said cylinders. 13. The method of claim 12, wherein each of the steps (c), (f) and (i) comprises the steps of: detecting whether the number of occurrences of ignitions is equal to "k-m", wherein "k" is said predetermined number, and "m" is an integral multiple of the number of said cylinders; counting clock pulses; detecting whether the number of occurrences of ignitions is equal to "k"; terminating the counting of clock pulses; and storing the clock count in a memory to represent the speed of revolution of the output shaft. 14. The method of claim 11, further comprising the steps of: defining a feedback control area surrounding the data stored in said memory; detecting whether an optimum advance angle datum generated subsequently to the step (C) falls outside of said defined feedback control area; and initializing the data stored in the steps (c), (f) and (i) when said subsequently generated datum is detected as falling outside said feedback control area. 15. The method of claim 11, further comprising the steps of: counting the number of occurrences of said feedback control area; detecting whether the counted number is below a predetermined value; and initializing the data stored in the steps (c), (f) and (i) when said counted number is detected as being below said predetermined value. 16. A control system for operating a power-producing machine at maximum output torque under varying operating conditions, said machine having an adjustable input machine variable means the setting of which controls the output torque, comprising: processing means for oscillating the setting of the adjustable input machine variable means by a predetermined amount with respect to a variable reference setting; and means for sensing an output machine variable representative of said output torque during at least three successive phases of the oscillation; said processing means detecting whether the detected output variables establish one of first and second sequential relationships of a plurality of possible sequential relationships indicating that said variable reference setting is on one of a first and second sides, respectively, of an optimum position; and said processing means adjusting said variable reference setting toward said optimum position exclusively in response to one of the detected first and second sequential relationships. 17. A control system as claimed in claim 16, wherein said oscillations of said processing means includes varying the input machine variable at least three settings in successive phases of a recurrent cycle. 18. A control system as claimed in claim 17, wherein said means for sensing an output machine variable comprises means for sensing said output variable during a short interval immediately prior to a transition from one phase to another of said recurrent cycle. 19. A control system for operating an internal combustion engine at maximum output torque under varying operating conditions, said engine having an output shaft and an adjustable input engine variable means the setting of which controls the output torque, comprising: processing means for oscillating the setting of the adjustable input engine variable means by a predetermined amount with respect to a variable reference setting; and means for sensing an output engine variable representative of said output torque during at least three successive phases of said oscillation; said processing means detecting whether said sensed output engine variables establish one of first and second sequential relationships of a plurality of possible sequential relationships indicating that said variable reference setting is on one of a first and second sides, respectively, of an optimum position; and said processing means adjusting said variable reference setting toward said optimum position exclusively in response to one of the detected first and second sequential relationships. 20. A control system for operating an internal combustion engine at maximum output torque under varying operating conditions, said engine having an output shaft and an adjustable spark ignition advance timing means the setting of which controls the output torque, comprising: a random access memory; means for generating a speed signal related to the speed of revolution of said output shaft; means for sensing the intake air pressure of said engine; and a microcomputer programmed to perform the following steps: (a) storing in said random access memory a set of reference ignition setting data as a function of said speed signal and as a function of the sensed intake air pressure; (b) selectively reading a datum from said random access memory at periodic intervals in response to said speed signal and intake air pressure; (c) oscillating the setting of said spark ignition timing means by a predetermined amount with respect to the setting of said datum read out of said memory; (d) successively storing data representative of said speed signal during at least three successive phases of the oscillation in said memory; (e) detecting when said stored speed representative data establish one of first and second sequential relationships of a plurality of possible sequential relationships indicating that the setting of said ignition timing means is on one of the advance and retard sides, respectively, of an optimum position; and (f) correcting said stored reference ignition setting data by a predetermined amount in one of a first and second directions exclusively in response to one of said detected first and second relationships. 21. A control system as claimed in claim 20, wherein said random access memory is of a nonvolatile type. 22. A control system as claimed in claim 20, including means for generating an angular position pulse in response to said output shaft rotating through a predetermined angle, and wherein the step (b) comprises the steps of: generating clock pulses at a frequency higher than the highest frequency of said angular position pulse; counting said clock pulses in response to said angular position pulse to determine the instantaneous angular position of said output shaft with respect to the position of said predetermined angle; and addressing said random access memory in accordance with said determined instantaneous angular position. 23. A control system as claimed in claim 20, further comprising a d.c. power source, an engine starter energized by said d.c. power source when said engine is being started, and means for sensing the voltage of said d.c. power source, and wherein said ignition advance timing steps of said microcomputer cooperate with an ignition coil and means for flowing a current into said ignition coil for a variable length of time as a function of said sensed voltage of said d.c. power source.
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이 특허에 인용된 특허 (7)
Schweitzer Paul H. (State College PA) Volz Carl (State College PA) Collins Thomas W. (State College PA), Adaptive control system for power producing machines.
Hetzler Lewis R. (Anderson IN) Huntzinger Gerald O. (Anderson IN) Winstead ; III William P. (Anderson IN) Zickel Thomas A. (Anderson IN), Digital ignition spark timing angle control with read only memory.
Omori Norio (Kariya JPX) Fujisawa Hideya (Kariya JPX) Kawashima Yutaka (Okazaki JPX) Ninomiya Masakazu (Kariya JPX) Kawai Hisasi (Toyohashi JPX) Matsui Takeshi (Aichi JPX), Method for controlling timing of spark ignition for an internal combustion engine by feedback related to the detection o.
Nishida Minoru (Okazaki JPX) Hattori Tadashi (Okazaki JPX) Yamaguchi Hiroaki (Anjo JPX), Method of controlling ignition timing for internal combustion engines and apparatus for carrying out the same.
Laubenstein Allan E. (Kokomo IN) Starich Donald V. (Kokomo IN) Brown Mitchell L. (Kokomo IN), Peak cylinder combustion pressure ignition spark timing system.
Willis Frederick G. (Ann Arbor MI) Radtke Richard R. (Plymouth MI) Ellison Joseph (Detroit MI) Fozo Steven R. (Westland MI) Kern Glenn A. (Ann Arbor MI), Adaptive strategy to control internal combustion engine.
Damitz,Jens; Palmer,Joachim; Fehrmann,Ruediger; Schueler,Matthias; Zu Schweinsberg,Alexander Schenck; Engber,Arnold; Steinert,Thomas, Extrapolation method for the angle-of-rotation position.
Wakeman Anthony C. (Bromsgrove GB2) Ironside John M. (Birmingham GB2) Holmes Michael (Birmingham GB2) Barnard Simon C. (Kenilworth GB2), Method and apparatus for controlling an internal combustion engine.
Suzuki Atsushi (Kariya JPX) Ninomiya Masakazu (Kariya JPX) Fukaya Hiroyasu (Nagoya JPX) Akiyama Susumu (Kariya JPX), Method and system for operating an engine at maximum torque with variable amount of dither.
Nguyen Huu-Can (Portet-sur-Garonne FRX), Method for the self-adaptive control of the angle of ignition advance of a thermal engine having positive ignition.
Thomas Christopher P. (West Bloomfield MI) McCombie Jay C. (Rochester Hills MI) Weber Gregory T. (Commerce Twp. MI) Ehlers Jeffery C. (Davisburg MI) Soltis Dennis A. (Goodrich MI), Method of adjusting idle spark for an individual cylinder of an internal combustion engine.
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