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公开(公告)号：US09562470B2
公开(公告)日：2017-02-07
申请号：US14700494
申请日：2015-04-30
Applicant: Tula Technology, Inc.
Inventor： Matthew A. Younkins , Shikui Kevin Chen , Li-Chun Chien , Masaki Nagashima , John W. Parsels , Geoff Routledge
IPC: F02B77/08 , G01M15/04 , G01P15/00 , G01L3/00 , F02D41/00 , F02D41/14 , F02D41/22 , F02D13/06 , F02D35/02
CPC classification number: F02B77/082 , F02D13/06 , F02D35/023 , F02D41/0087 , F02D41/1498 , F02D41/22 , F02D2041/001 , G01L3/00 , G01M15/042 , G01P15/00 , Y02T10/18 , Y02T10/40
Abstract: Methods and systems are described for detecting valve actuation faults in internal combustion engines operating in a skip fire operational mode. In one aspect, a torque model is used to estimate an expected net torque during a selected operating window. The torque model considers an expected torque contribution from each of the cylinders and accounts for the effects of specific skip fire firing decisions that affect the expected torque contribution from each cylinder. A parameter indicative of the actual engine torque is also measured. Valve actuation faults can then be identified based at least in part on a comparison of the measured parameter to an expected parameter value that is based at least in part on the expected net torque. With the described approaches, the occurrence of the valve actuation fault can be made within one engine cycle of the initial occurrence of the fault.
Abstract translation: 描述了用于检测以跳火操作模式操作的内燃机中的阀致动故障的方法和系统。 在一个方面，使用扭矩模型来估计所选操作窗口期间的预期净转矩。 扭矩模型考虑了每个气缸的预期扭矩贡献，并考虑了影响每个气缸的预期转矩贡献的特定跳火点火决定的影响。 还测量了表示实际发动机扭矩的参数。 至少部分地基于测量参数与至少部分地基于预期净转矩的预期参数值的比较来识别阀致动故障。 利用所述方法，可以在故障的初始发生的一个发动机循环内进行气门致动故障的发生。
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公开(公告)号：US11125175B2
公开(公告)日：2021-09-21
申请号：US17026706
申请日：2020-09-21
Applicant: Tula Technology, Inc.
Inventor： Shikui Kevin Chen , Aditya Mandal , Li-Chun Chien , Elliott Ortiz-Soto
Abstract: Using machine learning for cylinder misfire detection in a dynamic firing level modulation controlled internal combustion engine is described. In a classification embodiment, cylinder misfires are differentiated from intentional skips based on a measured exhaust manifold pressure. In a regressive model embodiment, the measured exhaust manifold pressure is compared to a predicted exhaust manifold pressure generated by neural network in response to one or more inputs indicative of the operation of the vehicle. Based on the comparison, a prediction is made if a misfire has occurred or not. In yet other alternative embodiment, angular crank acceleration is used as well for misfire detection.
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公开(公告)号：US10816438B2
公开(公告)日：2020-10-27
申请号：US16180703
申请日：2018-11-05
Applicant: Tula Technology, Inc.
Inventor： Shikui Kevin Chen , Aditya Mandal , Li-Chun Chien , Elliott Ortiz-Soto
Abstract: Using machine learning for misfire detection in a Dynamic firing level modulation controlled internal combustion engine is described. A neural network is used to calculate expected crank acceleration from various inputs, including the dynamically defined cylinder skip fire sequence. The output of the neural network is then compared to a signal indicative of the measured crank acceleration. Based the comparison, a prediction is made if a misfire has occurred or not. In alternative embodiment, the neural network is expanded to include the measured crank acceleration as an additional input. With the latter embodiment, the neural network is arranged to directly predict misfire events.
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公开(公告)号：US09650971B2
公开(公告)日：2017-05-16
申请号：US13963686
申请日：2013-08-09
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. Pirjaberi , Steven E. Carlson , Louis J. Serrano , Xin Yuan , Li-Chun Chien , Adya S. Tripathi
CPC classification number: F02D41/00 , F02D11/105 , F02D17/02 , F02D41/0087 , F02D41/0225 , F02D41/2422 , F02D2250/18
Abstract: The described embodiments relate generally to skip fire control of internal combustion engines and particularly to mechanisms for determining a desired operational firing fraction. In some embodiments, a firing fraction determining unit is arranged to determine a firing fraction suitable for delivering a requested engine output. The firing fraction determining unit may utilize data structures such as lookup tables in the determination of the desired firing fraction. In one aspect the desired engine output and one or more operational power train parameters such as current engine speed, are used as indices to a lookup table used to select a desired firing fraction. In other embodiments, additional indices to the data structure may include any one of: transmission gear; manifold absolute pressure (MAP); manifold air temperature; a parameter indicative of mass air charge (MAC); cam position; cylinder torque output; maximum permissible manifold pressure; vehicle speed; and barometric pressure.
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公开(公告)号：US09120478B2
公开(公告)日：2015-09-01
申请号：US13963744
申请日：2013-08-09
Applicant: Tula Technology, Inc.
Inventor： Steven E. Carlson , Xin Yuan , Joshua P. Switkes , Li-Chun Chien
IPC: B60W10/06 , B60W10/11 , B60W30/19 , F02D41/00 , F16H63/50 , F02D41/14 , F02P5/15 , F02P9/00 , F02D41/02
CPC classification number: B60W10/06 , B60W10/11 , B60W30/19 , F02D41/0087 , F02D41/023 , F02D41/1497 , F02D2250/18 , F02D2250/21 , F02P5/1504 , F02P5/1512 , F02P9/005 , F16H63/502 , Y02T10/46 , Y10T477/677
Abstract: Methods and devices are described that utilize skip fire techniques to rapidly meet requests for transitory changes in the output of an engine. Specifically, the fraction or percentage of the working cycles that are fired can be changed during a transitory event so that the engine delivers the desired transitory engine output. Once the transitory event is over, normal engine operation may be restored. The described techniques are useful in a variety of applications that require a relatively quick, but transitory, reduction in engine output to meet vehicle control requirements. One particularly useful application is during transmission shift events. Other representative applications include: loss of traction events, stability control events, wheel hop prevention events, etc.
Abstract translation: 描述了利用跳火技术快速满足对发动机的输出的瞬时变化的请求的方法和装置。 具体地说，在瞬态事件期间可以改变被激发的工作循环的分数或百分比，以便发动机输出期望的暂时发动机输出。 一旦暂时事件结束，可以恢复正常的发动机运转。 所描述的技术在各种应用中是有用的，其需要相对快速但短暂的发动机输出的降低以满足车辆控制要求。 一个特别有用的应用是传输移位事件。 其他代表性应用包括：牵引事件的损失，稳定性控制事件，防止跳闸事件等。
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Patent Agency Ranking
公开(公告)号：US11326534B2
公开(公告)日：2022-05-10
申请号：US17407984
申请日：2021-08-20
Applicant: Tula Technology, Inc.
Inventor： Shikui Kevin Chen , Aditya Mandal , Li-Chun Chien , Elliott Ortiz-Soto
Abstract: Using machine learning for cylinder misfire detection in a dynamic firing level modulation controlled internal combustion engine is described. In a classification embodiment, cylinder misfires are differentiated from intentional skips based on a measured exhaust manifold pressure. In a regressive model embodiment, the measured exhaust manifold pressure is compared to a predicted exhaust manifold pressure generated by neural network in response to one or more inputs indicative of the operation of the vehicle. Based on the comparison, a prediction is made if a misfire has occurred or not. In yet other alternative embodiment, angular crank acceleration is used as well for misfire detection.
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公开(公告)号：US10247121B2
公开(公告)日：2019-04-02
申请号：US14638908
申请日：2015-03-04
Applicant: Tula Technology Inc. , GM Global Technology Operations LLC
Inventor： Mark A. Shost , Louis J. Serrano , Steven E. Carlson , Vijay Srinivasan , Eric J. Defenderfer , Nitish J. Wagh , Randall S. Beikmann , Jinbiao Li , Xin Yuan , Li-Chun Chien
Abstract: In one aspect, a skip fire engine controller is described. The skip fire engine controller includes a skip fire module arranged to determine an operational firing fraction and associated cylinder load for delivering a desired engine output. The skip fire engine controller also includes a firing controller arranged to direct firings in a skip fire manner that delivers the selected operational firing fraction. Various methods, modules, lookup tables and arrangements related to the selection of a suitable operational firing fraction are also described.
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公开(公告)号：US10941722B2
公开(公告)日：2021-03-09
申请号：US16270349
申请日：2019-02-07
Applicant: Tula Technology Inc. , GM Global Technology Operations LLC
Inventor： Mark A. Shost , Louis J. Serrano , Steven E. Carlson , Vijay Srinivasan , Eric J. Defenderfer , Nitish J. Wagh , Randall S. Beikmann , Jinbiao Li , Xin Yuan , Li-Chun Chien
Abstract: In one aspect, a skip fire engine controller is described. The skip fire engine controller includes a skip fire module arranged to determine an operational firing fraction and associated cylinder load for delivering a desired engine output. The skip fire engine controller also includes a firing controller arranged to direct firings in a skip fire manner that delivers the selected operational firing fraction. Various methods, modules, lookup tables and arrangements related to the selection of a suitable operational firing fraction are also described.
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公开(公告)号：US10088388B2
公开(公告)日：2018-10-02
申请号：US15701155
申请日：2017-09-11
Applicant: Tula Technology Inc.
Inventor： Shikui Kevin Chen , Masaki Nagashima , Li-Chun Chien
Abstract: A variety of methods and arrangements for detecting misfire and other engine-related errors are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. There is an attempt to fire a target working chamber during the target firing opportunity. A change in an engine parameter (e.g., crankshaft angular acceleration) is measured during the window. A model (e.g., a pressure model) is used to help determine an expected change in the engine parameter during the target firing opportunity. Based on a comparison of the expected change and the measured change in the engine parameter, a determination is made as to whether an engine error (e.g., misfire) has occurred.
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公开(公告)号：US09784644B2
公开(公告)日：2017-10-10
申请号：US14880652
申请日：2015-10-12
Applicant: Tula Technology Inc.
Inventor： Shikui Kevin Chen , Masaki Nagashima , Li-Chun Chien
CPC classification number: G01M15/11 , F02D35/024 , F02D41/0087 , F02D41/0097 , F02D41/22 , F02D2200/1012 , F02D2200/1015
Abstract: A variety of methods and arrangements for detecting misfire and other engine-related errors are described. In one aspect, a window is assigned to a target firing opportunity for a target working chamber. There is an attempt to fire a target working chamber during the target firing opportunity. A change in an engine parameter (e.g., crankshaft angular acceleration) is measured during the window. A model (e.g., a pressure model) is used to help determine an expected change in the engine parameter during the target firing opportunity. Based on a comparison of the expected change and the measured change in the engine parameter, a determination is made as to whether an engine error (e.g., misfire) has occurred.
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