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公开(公告)号：US11131259B1
公开(公告)日：2021-09-28
申请号：US17119321
申请日：2020-12-11
发明人： Louis J. Serrano , Xiaoping Cai , Shikui Kevin Chen , Benjamin M. Wolk , Avra Brahma , Justin R. Lee
摘要： A system and method for transitioning a firing fraction of a variable displacement internal combustion engine when generating a desired torque output. During and following the transition to the second firing fraction, a charge of a combustion recipe is ascertained and used operating the cylinders of the variable displacement internal combustion engine to generate the desired torque output. The charge is preferably optimized for the engine operating at the second firing fraction, at least relative to the previous charge of the previous combustion recipe used with the first firing fraction.
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公开(公告)号：US11946423B2
公开(公告)日：2024-04-02
申请号：US17373247
申请日：2021-07-12
发明人： Louis Joe Serrano , Xiaoping Cai , Yongyan Cao , Vijay Srinivasan , Kevin Shikui Chen , Andrea Marie Evans , Avra Brahma
CPC分类号： F02D41/0087 , F02D35/024 , F02D41/0007 , F02D41/0055 , F02D41/0077 , F02D41/1401 , F02D41/38 , F02D2041/0012 , F02D2041/141 , F02D2041/1433 , F02D2200/0406
摘要： A variety of methods and arrangements are described for managing recharging of cylinders of an internal combustion engine during skip fire operation of the engine. In one method, a maximum allowed deactivation time for a cylinder is determined and the cylinder is recharged before the maximum allowed deactivation time is exceeded.
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公开(公告)号：US11459965B2
公开(公告)日：2022-10-04
申请号：US17186979
申请日：2021-02-26
发明人： Vijay Srinivasan , Louis J. Serrano , Xiaoping Cai , J. Steven Kolhouse , Avra Brahma , Adrian P. Dale
摘要： Managing firing fraction transitions of a variable displacement internal combustion engines by (a) avoiding transport delays in an Exhaust Gas Recirculation (EGR) feed by starting movement of an EGR valve position after a decision to transition to a new firing fraction has been made, but prior to the start of the transition and (b) adjusting the EGR valve as needed during the transition so as to maintain an EGR fraction within a predetermined range during the transition. By performing both (a) and (b), spikes of nitrous oxide (NOx) and/or hydrocarbon emissions are reduced or altogether eliminated during the transition.
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公开(公告)号：US20220307434A1
公开(公告)日：2022-09-29
申请号：US17213387
申请日：2021-03-26
发明人： Louis J. Serrano , Kevin Shikui Chen , Xiaoping Cai , John Fuerst
摘要： A variety of methods and arrangements are described for operating an engine in a skip fire manner so that engine requirements, such as exhaust temperature, exhaust flow, torque and NVH, are met.
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公开(公告)号：US11619187B2
公开(公告)日：2023-04-04
申请号：US17714880
申请日：2022-04-06
发明人： Louis J. Serrano , Xiaoping Cai , Shikui Kevin Chen , Benjamin M. Wolk , Avra Brahma , Justin R. Lee
摘要： A system and method for transitioning a firing fraction of a variable displacement internal combustion engine when generating a desired torque output. During and following the transition to the second firing fraction, a combustion recipe is ascertained and used operating the cylinders of the variable displacement internal combustion engine to generate the desired torque output. The recipe is preferably optimized for the engine operating at the second firing fraction, at least relative to the previous charge of the previous combustion recipe used with the first firing fraction.
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公开(公告)号：US11326532B1
公开(公告)日：2022-05-10
申请号：US17412668
申请日：2021-08-26
发明人： Louis J. Serrano , Xiaoping Cai , Shikui Kevin Chen , Benjamin M. Wolk , Avra Brahma , Justin R. Lee
摘要： A system and method for transitioning a firing fraction of a variable displacement internal combustion engine when generating a desired torque output. During and following the transition to the second firing fraction, a combustion recipe is ascertained and used operating the cylinders of the variable displacement internal combustion engine to generate the desired torque output. The recipe is preferably optimized for the engine operating at the second firing fraction, at least relative to the previous charge of the previous combustion recipe used with the first firing fraction.
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公开(公告)号：US20220065182A1
公开(公告)日：2022-03-03
申请号：US17373247
申请日：2021-07-12
发明人： Louis Joe Serrano , Xiaoping Cai , Yongyan Cao , Vijay Srinivasan , Kevin Shikui Chen , Andrea Marie Evans , Avra Brahma
摘要： A variety of methods and arrangements are described for managing recharging of cylinders of an internal combustion engine during skip fire operation of the engine. In one method, a maximum allowed deactivation time for a cylinder is determined and the cylinder is recharged before the maximum allowed deactivation time is exceeded.
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公开(公告)号：US11685380B1
公开(公告)日：2023-06-27
申请号：US17576160
申请日：2022-01-14
CPC分类号： B60W30/19 , B60W10/06 , B60W10/11 , F02D41/0087 , F02D41/0225 , F02D2200/101 , F02D2200/501
摘要： Methods and controllers for controlling engine speed to reduce NVH that occurs in conjunction with transmission shifts are described. In some embodiments, when a transmission shift to a target gear is expected, a target engine speed appropriate for the target gear is first determined. A target rate of change of the engine speed is calculated from the initial engine speed and target engine speed in conjunction with a target transition time. A target torque is then calculated from the target rate of change of engine speed. A target firing fraction or induction ratio are determined that are desired for use with the target engine speed based on the target torque. The transition to the target engine speed and target firing fraction or induction ratio are completed before the gear shift is completed. The described approaches are well suited for use during skip fire or other cylinder output level modulation operation of the engine.
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公开(公告)号：US11434839B2
公开(公告)日：2022-09-06
申请号：US17137955
申请日：2020-12-30
摘要： A system and method for the use of machine learning for detecting faults for cylinder intake and/or exhaust valves that do not properly open or close as commanded and for generating a flag for such faults.
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公开(公告)号：US11260844B2
公开(公告)日：2022-03-01
申请号：US17029560
申请日：2020-09-23
摘要： Methods and controllers for coordinating firing fraction transitions that occur in conjunction with transmission shifts are described. In one aspect, an engine controller transmits a do-not-shift instruction to a transmission controller based at least in part on a determination that a particular type of firing fraction transition is desired. The firing fraction transition is then implemented using a skip fire transition protocol. In this manner, the transmission is affirmatively prevented from shifting during the firing fraction transition. The described approaches are well suited for use in connection with transitions to DCCO or DFCO operation.
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