A variety of methods and arrangements for controlling the operation of an internal combustion engine in a skip fire variable displacement mode are described. In one aspect, the working chamber firing that are selected to deliver the desired engine output are determined at least in part based on torq
A variety of methods and arrangements for controlling the operation of an internal combustion engine in a skip fire variable displacement mode are described. In one aspect, the working chamber firing that are selected to deliver the desired engine output are determined at least in part based on torque feedback. The torque feedback may be an indication of the torque output of the engine or the torque experienced at some other location in the drive train. In some embodiments, the torque feedback signal is filtered to remove high frequency components of the torque feedback signal in order to help stabilize the system. In another aspect, other operational parameters are used as feedback in the determination of the firing sequence. In yet another aspect, a filter is arranged to filter a feedback signal to provide a filtered feedback signal that is used in the determination of the working chamber firings.
대표청구항▼
1. A method of determining firings during operation of an engine in a skip fire operational mode, the method comprising: receiving an input signal indicative of a desired engine output;selectively determining working cycles to be fired and working cycles to be skipped, wherein the fired working cycl
1. A method of determining firings during operation of an engine in a skip fire operational mode, the method comprising: receiving an input signal indicative of a desired engine output;selectively determining working cycles to be fired and working cycles to be skipped, wherein the fired working cycles are arranged to deliver the desired engine output;providing a torque feedback signal indicative of a torque; andwherein the determination of the firings is based at least in part on the torque feedback signal. 2. A method as recited in claim 1 further comprising filtering the torque feedback signal using a low pass filter, wherein the determination of the firings is based at least in part on the filtered torque feedback signal. 3. A method as recited in claim 1 wherein the torque feedback signal is indicative of a torque output of the engine. 4. A method as recited in claim 3 wherein the torque feedback signal indicates the instantaneous torque of the engine and has a profile that varies over a period between sequential firing opportunities of the engine. 5. A method as recited in claim 4 wherein the torque profile includes periods of negative torque. 6. A method as recited in claim 1 wherein the torque feedback signal is obtained at least in part from a torque sensor that monitors engine torque or the torque of a component in a drive train associated with the engine. 7. A method as recited in claim 1 wherein the torque feedback signal is generated at least in part by a torque calculator. 8. A method as recited in claim 1 wherein the torque feedback signal is determined at least in part by reference to a look-up table. 9. A method as recited in claim 8 wherein a first index for the lookup table is based on a mass of air introduced to an associated working chamber. 10. A method as recited in claim 8 wherein the engine includes a plurality of working chambers and wherein for each firing, an index for the lookup table is based at least in part on a firing history of an associated working chamber. 11. A method as recited in claim 1 wherein the torque is selected from the group consisting of: a transmission torque, a drive shaft torque, a wheel torque, and a torque converter torque. 12. A method as recited in claim 1, wherein feedback from at least one additional source is used in the determination of the firing sequence, wherein the at least one additional source is selected from the group consisting of vehicle acceleration, wheel speed, wheel acceleration, engine speed, engine acceleration, and speed or acceleration of a component of a drive train between an engine and a vehicle's wheels. 13. A controller for determining working cycle firings of an engine during operation of the engine in a skip fire operational mode, the controller comprising a control block that receives an input signal indicative of a desired output and is arranged to dynamically determine working chamber firings that deliver the desired output, wherein the control block is arranged to receive a torque feedback signal that is indicative of a torque associated with the engine and to determine the firings based at least in part on the torque feedback signal. 14. A controller as recited in claim 13 wherein the torque is one selected from the group consisting of: the torque output of the engine;the torque of a drive shaft associated with the engine;the torque of a torque converter associated with the engine;the torque of a transmission associated with the engine; andthe torque of a wheel associated with the engine. 15. A controller as recited in claim 13 wherein the control block is arranged to dynamically determine the working chamber firings on a firing opportunity by firing opportunity basis. 16. A controller as recited in claim 13 wherein the torque feedback signal is indicative of the instantaneous torque output of the engine. 17. An engine comprising a plurality of working chambers and the controller recited in claim 16, wherein the engine further includes a torque sensor that generates the torque feedback signal. 18. A controller as recited in claim 13 further comprising a lookup table that includes entries indicative of the instantaneous torque provided by working chamber firings under a multiplicity of different operating conditions and the torque feedback signal is generated based at least in part by referencing the lookup table. 19. A controller as recited in claim 18 wherein a first index for the lookup table is based on a mass of air introduced into an associated working chamber. 20. A controller as recited in claim 18 wherein the engine includes a plurality of working chambers and wherein for each firing an index for the lookup table is based at least in part on a firing history of an associated working chamber. 21. A controller as recited in claim 13 further comprising a filter arranged to filter high frequency components from the torque feedback signal to help stabilize the controller. 22. A controller as recited in claim 13 further comprising a variable filter arranged to filter the torque feedback signal, wherein the variable filter has frequency characteristics that vary as a function of engine speed. 23. A controller as recited in claim 13 further comprising a filter arranged to filter the torque feedback signal, wherein the controller is arranged to vary the frequency characteristics of the filter as a function of a transmission gear ratio. 24. A controller as recited in claim 13 wherein the controller includes a sigma delta converter and the torque feedback signal is used directly or indirectly in the primary feedback loop of the sigma delta converter. 25. A method of determining firings during operation of an engine in a skip fire operational mode, the method comprising: receiving an input signal indicative of a desired engine output;selectively determining working cycles to be fired and working cycles to be skipped, wherein the fired working cycles are arranged to deliver the desired engine output;providing a feedback signal selected from the group consisting of vehicle acceleration, wheel speed, wheel acceleration, speed of a component of a drive train and acceleration of a component of the drive train; andwherein the determination of the firings is based at least in part on the feedback signal. 26. A method as recited in claim 25 further comprising filtering the feedback signal using a low pass filter, wherein the determination of the firings is based at least in part on the filtered feedback signal. 27. A method as recited in claim 25 wherein the feedback signal is indicative of an operational parameter and is obtained at least in part from one selected from the group consisting of: a sensor that monitors the parameter indicated by the feedback signal;a calculator arranged to calculate the parameter indicated by the feedback signal; anda look-up table. 28. A method as recited in claim 25 further comprising a variable filter arranged to filter the feedback signal, wherein the variable filter has frequency characteristics that vary as a function of engine speed. 29. A method as recited in claim 25 further comprising a filter arranged to filter the feedback signal, wherein controller is arranged to vary the frequency characteristics of the filter as a function of a transmission gear ratio. 30. A method as recited in claim 25 wherein the controller includes a sigma delta converter and the feedback signal is used directly or indirectly in the primary feedback loop of the sigma delta converter. 31. A method as recited in claim 25, wherein feedback from at least one additional source is also used in the determination of the firing sequence, wherein the at least one additional source is selected from the group consisting of vehicle acceleration, wheel speed, wheel acceleration, engine speed, engine acceleration, engine torque, and speed, acceleration or torque of a component of a drive train between an engine and a vehicle's wheels. 32. A controller for determining firings during operation of an engine in a skip fire operational mode, wherein the controller includes: a converter that receives an input signal indicative of a desired output and is arranged to generate a digital converter output signal that is reflective of the input signal and oversampled relative to the firing opportunities of the engine; anda synchronizer that is synchronized with the firing opportunities of the engine, wherein the synchronizer decimates the digital converter output signal in a manner to produce a drive pulse signal that defines a firing sequence that delivers the desired output. 33. A controller as recited in claim 32 wherein the converter is a sigma delta converter. 34. A controller as recited in claim 33 wherein the converter is a first order sigma delta controller or a third order sigma delta converter. 35. A controller as recited in claim 32 wherein the converter includes at least one split pole arranged to compensate for delays introduced by the synchronizer.
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이 특허에 인용된 특허 (135)
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Chiesa Alan F. (Yale MI) Colden Fayetta L. (Lake Orion MI) Singer David A. (Farmington MI) Zahorchak John A. (Warren MI), Adaptive air/fuel ratio controller for internal combustion engine.
Grutter Peter J. (Plymouth MI) Lipinski Daniel J. (Livonia MI) LoRusso Julian A. (Grosse Ile MI) Nowland Donald R. (Taylor MI) Prior Ernest C. (Woodhaven MI) Robichaux Jerry D. (Southgate MI), Air induction control system for variable displacement internal combustion engine.
Sugasawa Fukashi (Yokohama JPX) Iizuka Haruhiko (Yokosuka JPX) Matsumoto Junichiro (Yokosuka JPX), Apparatus for controlling the number of enabled cylinders of an internal combustion engine upon deceleration.
Goras Anders J.,SEX ; Almstedt Bo F. Nilson,SEX ; Bjorquist Cunnar L. C.,SEX, Arrangement and method for configuration of distributed computer networks implemented in multi cylinder combustion eng.
Haimerl, Michael; Pohmerer, Wolf-Dieter; Reichl, Hans-Jurgen; Sagmeister, Ulli Christian; Teiner, Markus, Control device for final control elements of an internal combustion engine, control unit for actuator drives of an internal combustion engine and a method for controlling an internal combustion engin.
Sen,Naoto; Okada,Tadayoshi; Sugiyama,Akira; Nishida,Kenichi; Tomokuni,Yasuhiko; Ishiyama,Mahito; Yamashita,Kazuo, Control system for cylinder cut-off internal combustion engine.
Kushiyama,Hiroyuki; Nishio,Shinichi; Katakura,Takehiro; Nakajima,Kenji, Control system for vehicle having an engine capable of performing and stopping combustion in each cylinder.
Lipinski Daniel J. (Livonia MI) LoRusso Julian A. (Grosse Ile MI) Nowland Donald R. (Taylor MI) Robichaux Jerry D. (Southgate MI) Schymik Gregory B. (Ypsilanti MI) Tan Teik-Khoon (Ann Arbor MI), Cylinder mode selection system for variable displacement internal combustion engine.
Roznovsky Frank B. (1911 Margaret Houston TX 77093), Device for selectively controlling the number of operative cylinders in multi-cylinder internal combustion engines.
Harvey Bruce J. (Sterling Heights MI) Laurent Harold J. (Newport News VA) Pauwels Michael A. (Williamsburg VA), Fuel control system for actuating injection means for controlling small fuel flows.
Maira, Massimiliano; Richard, Francesco, Internal combustion engine with means for uniforming the amount of intake air in different cylinders, and method therefor.
Matthews, Gregory Paul; Folkerts, Charles Henry, Method and apparatus for deactivating and reactivating cylinders for an engine with displacement on demand.
Cullen Michael J. (Northville MI) Marzonie Robert M. (Northville MI) Ulrey Joseph N. (Hiroshima MI JPX) Sbaschnig Richard W. (Dearborn MI) Weyburne Michael A. (Northville MI) Mingo Paul C. (Farmingto, Method and apparatus for maintaining temperatures during engine fuel cutoff modes.
Gopp Alexander Y. (Ann Arbor MI) Sbaschnig Richard W. (Dearborn MI) Buonocore Richard L. (Sterling Heights MI), Method and apparatus for protecting an engine from overheating.
Dunsworth, Vincent F.; Dillen, Eric Richard; Gallagher, Shawn Michael, Method and apparatus for reducing locomotive diesel engine smoke using skip firing.
Schnaibel Eberhard,DEX ; Zhang Hong,DEX, Method and arrangement for controlling the torque of internal combustion engine while deactivating individual cylinders.
Bonne,Michael A; Duty,Mark J; Prucka,Michael J, Method and code for controlling temperature of engine component associated with deactivatable cylinder.
Kohama Tokio (Nishio JPX) Huzino Seizi (Okazaki JPX) Obayashi Hideki (Okazaki JPX) Kawai Hisasi (Toyohashi JPX) Egami Tsuneyuki (Aichi JPX), Method and system for output control of internal combustion engine.
Nagano Masami (Katsuta JPX) Atago Takeshi (Katsuta JPX), Method for determining the control values of a multicylinder internal combustion engine and apparatus therefor.
Lembke Manfred (Gerlingen DEX) Kratt Alfred (Schwieberdingen DEX) Abidin Anwar (Leonberg DEX), Method for reducing the fuel supply for one engine cylinder.
Peter V. Woon ; Axel O. Zur Loye ; Larry J. Brackney ; Jay F. Leonard ; Eric K. Bradley ; Terry M. Vandenberghe ; Jacqueline M. Yeager ; Julie A. Wagner ; Greg A. Moore, Operating techniques for internal combustion engines.
Frster Hans-Joachim (Stuttgart DEX) Lbbing Bernd-Eric (Winterbach DEX) Letsche Ulrich (Stuttgart DEX), Process and apparatus for intermittent control of a cyclically operating internal combustion engine.
Tripathi, Adya S.; Chandler, Christopher W.; Hand, Christopher C.; Switkes, Joshua P.; Wilcutts, Mark A.; Younkins, Matthew A., Skip fire engine control.
Huffmaster Roger L. (Canton MI) Robichaux Jerry D. (Southgate MI), System and method for controlling the transient torque output of a variable displacement internal combustion engine.
Huffmaster Roger L. (Canton MI) Robichaux Jerry D. (Southgate MI), System and method for controlling the transient torque output of a variable displacement internal combustion engine.
Gibson,Alex; Michelini,John O.; McCallum,James; Kolmanovsky,Ilya V.; Song,Gang, System and method for reducing vehicle acceleration during engine transitions.
Lipinski Daniel J. (Livonia MI) LoRusso Julian A. (Grosse Ile MI) Robichaux Jerry D. (Southgate MI), System and method for synchronously activating cylinders within a variable displacement engine.
Serrano, Louis J.; Carlson, Steven E.; Haase, Steven J.; Dibble, Donavan L.; Rayl, Allen B., Coordination of vehicle actuators during firing fraction transitions.
Serrano, Louis J.; Carlson, Steven E.; Haase, Steven J.; Dibble, Donavan L.; Rayl, Allen B., Coordination of vehicle actuators during firing fraction transitions.
Pirjaberi, Mohammad R.; Carlson, Steven E.; Serrano, Louis J.; Yuan, Xin; Chien, Li-Chun; Tripathi, Adya S., Firing fraction management in skip fire engine control.
Tripathi, Adya S.; Silvestri, Chester J.; Chandler, Christopher W.; Hand, Christopher C.; Switkes, Joshua P.; Wilcutts, Mark A.; Younkins, Matthew A., Internal combustion engine control for improved fuel efficiency.
Beikmann, Randall S., System and method for controlling a firing sequence of an engine to reduce vibration when cylinders of the engine are deactivated.
Brennan, Daniel G.; Naik, Sanjeev M., System and method for controlling spark timing when cylinders of an engine are deactivated to reduce noise and vibration.
Phillips, Andrew W., System and method for randomly adjusting a firing frequency of an engine to reduce vibration when cylinders of the engine are deactivated.
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