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公开(公告)号：US20200318566A1
公开(公告)日：2020-10-08
申请号：US16839651
申请日：2020-04-03
摘要： An internal combustion engine operates so that it delivers zero or negative torque. The engine operates in either a deceleration cylinder cut off (DCCO) mode or skip cylinder compression braking mode. In the skip cylinder compression braking mode, selected working cycles of selected working chambers are operated in a compression release braking mode. Accordingly, individual working chambers are sometimes not fired and sometimes operated in the compression release braking mode while the engine is operating in the skip cylinder compression braking mode.
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公开(公告)号：US20200218258A1
公开(公告)日：2020-07-09
申请号：US16822741
申请日：2020-03-18
IPC分类号： G05D1/00 , B60W30/188 , F02D11/10 , F02D29/02 , F02D17/02 , F02D41/00 , F02D41/14 , F02P5/15
摘要： The present invention relates generally to techniques for improving fuel efficiency of a vehicle powered by an internal combustion engine capable of operating at various displacement levels. An autonomous driving unit or cruise controller selects when possible an engine torque output that corresponds to a fuel efficient displacement level. The resultant vehicle speed profile and NVH level is acceptable to vehicle occupants.
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公开(公告)号：US20190145329A1
公开(公告)日：2019-05-16
申请号：US16246888
申请日：2019-01-14
发明人： Louis J. SERRANO , Xin YUAN , John W. PARSELS , Mohammad R. PIRJABERI , Mark A. WILCUTTS , Masaki NAGASHIMA
摘要： A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
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公开(公告)号：US20180230919A1
公开(公告)日：2018-08-16
申请号：US15918284
申请日：2018-03-12
CPC分类号： F02D41/0087 , F02D41/0002 , F02D41/1498 , F02D41/3058 , F02D41/307 , F02D2041/0012 , F02D2041/1432 , F02D2250/24
摘要： A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a dynamic firing level modulation manner. A smoothing torque is determined by adaptive control that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
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公开(公告)号：US20180043893A1
公开(公告)日：2018-02-15
申请号：US15792175
申请日：2017-10-24
IPC分类号： B60W30/188 , B60W10/06 , B60W10/02
CPC分类号： B60W30/1882 , B60W10/023 , B60W10/06 , B60W30/188 , B60W2710/025 , B60W2710/0677 , F02D17/02 , F02D37/02 , F02D41/0002 , F02D41/0087 , F02D41/0215 , F02D2041/001 , F02D2250/21 , F02P5/145 , F02P5/1504 , F02P9/002 , Y02T10/42
摘要： A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire or dynamic firing level modulation operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, TCC slip, etc.) is changed to, or close to a target position before a corresponding firing fraction change is implemented. When the actuator change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps. A number of intermediate target selection schemes are described as well.
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公开(公告)号：US20170369063A1
公开(公告)日：2017-12-28
申请号：US15288847
申请日：2016-10-07
CPC分类号： F02D41/0087 , B60W10/023 , B60W10/06 , B60W30/188 , B60W2710/025 , F02D17/02 , F02D37/02 , F02D41/0215 , F02D2041/001 , F02D2250/21 , F02P5/145 , F02P5/1504
摘要： A variety of methods and arrangements are described for controlling transitions between firing fractions during skip fire and potentially variable displacement operation of an engine. In general, actuator first transition strategies are described in which an actuator position (e.g., cam phase, TCC slip, etc.) is changed to, or close to a target position before i corresponding firing fraction change is implemented. When the actuator change associated with a desired firing fraction change is relatively large, the firing fraction change is divided into a series of two or more firing fraction change steps. A number of intermediate target selection schemes are described as well.
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公开(公告)号：US20160040614A1
公开(公告)日：2016-02-11
申请号：US14919018
申请日：2015-10-21
CPC分类号： F02D41/0087 , F02D13/0269 , F02D13/06 , F02D17/02 , F02D37/02 , F02D41/126 , F02D41/1401 , F02D41/266 , F02D2200/602 , F02D2250/18 , F02D2400/02 , F02P5/1512 , F02P9/002 , Y02T10/142 , Y02T10/46
摘要： In one aspect, a method for controlling operation of an internal combustion engine is described. The engine is operated in a skip fire manner such that selected skipped working cycles are skipped and selected active working cycles are fired to deliver a desired engine output. A particular level of torque output is selected for each of the fired working chambers. Various methods, engine controllers, arrangements and systems related to the above method are also described.
摘要翻译： 一方面，对内燃机的运转控制方法进行说明。 发动机以跳火方式操作，使得跳过所选择的跳过的工作循环并且激发选定的主动工作循环以输送期望的发动机输出。 对于每个烧制工作室选择特定水平的扭矩输出。 还描述了与上述方法相关的各种方法，发动机控制器，布置和系统。
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公开(公告)号：US20220252017A1
公开(公告)日：2022-08-11
申请号：US17725125
申请日：2022-04-20
发明人： Shikui Kevin CHEN , Louis J. SERRANO , Vijay SRINIVASAN , Elliott A. ORTIZ-SOTO , Matthew A. YOUNKINS
摘要： A system and method for controlling an internal combustion engine involving (1) cylinder trapping strategies where one of several pneumatic spring types are dynamically selected for cylinders based at least partially on a predicted number of upcoming skips for each of the cylinders respectively and/or (2) staggering various valvetrain dependent operational engine strategies as operating conditions permit as the internal combustion engine warms up following a cold start.
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公开(公告)号：US20220074361A1
公开(公告)日：2022-03-10
申请号：US17530179
申请日：2021-11-18
摘要： Methods, devices, estimators, controllers and algorithms are described for estimating the torque profile of an engine and/or for controlling torque applied to a powertrain by one or more devices other than the engine itself to manage the net torque applied by the engine and other device(s) in manners that reduce undesirable NVH. The described approaches are particularly well suitable for use in hybrid vehicles in which the engine is operated in a skip fire or other dynamic firing level modulation manner—however they may be used in a variety of other circumstances as well. In some embodiments, the hybrid vehicle includes a motor/generator that applies the smoothing torque.
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公开(公告)号：US20210396189A1
公开(公告)日：2021-12-23
申请号：US17463814
申请日：2021-09-01
发明人： Louis J. SERRANO , Xin YUAN , John W. PARSELS , Mohammad R. PIRJABERI , Mark A. WILCUTTS , Masaki NAGASHIMA
摘要： A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
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