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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
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Xin YUAN , John W. PARSELS , Mohammad R. PIRJABERI , Mark A. WILCUTTS , Masaki NAGASHIMA
Abstract: 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
Applicant: Tula Technology, Inc.
Inventor： Masaki NAGASHIMA , Mohammad R. PIRJABERI , Louis J. SERRANO , Xin YUAN , John W. PARSELS
CPC classification number: F02D41/0087 , F02D41/0002 , F02D41/1498 , F02D41/3058 , F02D41/307 , F02D2041/0012 , F02D2041/1432 , F02D2250/24
Abstract: 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：US20160061127A1
公开(公告)日：2016-03-03
申请号：US14939498
申请日：2015-11-12
Applicant: Tula Technology Inc.
Inventor： Shikui Kevin CHEN , Xin YUAN , Joshua P. SWITKES , Steven E. CARLSON , Mark A. SHOST
CPC classification number: F02D41/0087 , F02D17/00 , F02D17/02 , F02D37/02 , F02D41/00 , F02D41/0082 , F02D41/0235 , F02D2041/2027 , F02D2250/18 , Y02T10/44
Abstract: Methods and devices are described for performing engine diagnostics during skip fire operation of an engine while a vehicle is being driven. Knowledge of the firing sequence is used to determine appropriate times to conduct selected diagnostics and/or to help better interpret sensor inputs or diagnostic results. In one aspect, selected diagnostics are executed when a single cylinder is fired a plurality of times in isolation relative to a sensor used in the diagnosis. In another aspect, selected diagnostics are conducted while the engine is operated using a firing sequence that insures that no cylinders in a first cylinder bank are fired for a plurality of engine cycles while cylinders in a second bank are at least sometimes fired. The described tests can be conducted opportunistically, when conditions are appropriate, or specific firing sequences can be commanded to achieve the desired isolation or skipping of one or more selected cylinders.
Abstract translation: 描述了用于在车辆被驱动时在发动机的跳过点火操作期间执行发动机诊断的方法和装置。 了解激发序列用于确定适当的时间以进行选定的诊断和/或帮助更好地解释传感器输入或诊断结果。 在一个方面，当单个气缸相对于诊断中使用的传感器被隔离多次时，执行选择的诊断。 在另一方面，当使用确保在第一气缸组中没有气缸在多个发动机循环中被点火的点火顺序来操作发动机时，进行选择的诊断，而在第二组中的气缸至少有时被点火。 所描述的测试可以在条件合适的情况下机会地进行，或者可以命令特定的点火顺序来实现一个或多个选择的气缸的期望的隔离或跳过。
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4.发明申请公开(公告)号：US20140041626A1
公开(公告)日：2014-02-13
申请号：US13963819
申请日：2013-08-09
Applicant: Tula Technology, Inc.
Inventor： Mark A. WILCUTTS , Xin YUAN , Joshua P. SWITKES , Steven E. CARLSON , John F. IMPEDUGLIA , John W. PARSELS
IPC: F02D41/00
CPC classification number: B60W30/20 , B60W10/026 , B60W10/08 , B60W2030/203 , B60W2710/025 , F02D11/105 , F02D41/00 , F02D41/0087 , F02D41/022 , F02D41/18 , F02D2250/18
Abstract: A variety of methods and devices for mitigating power train vibration during skip fire operation of an engine are described. In one aspect, the slip of a drive train component (such as a torque converter clutch) is based at least in part upon a skip fire characteristic (such as firing fraction, selected firing sequence/pattern, etc.) during skip fire operation of an engine. The modulation of the drive train component slip can also be varied as a function of one or more engine operating parameters such as engine speed and/or a parameter indicative of the output of fired cylinders (such as mass air charge).
Abstract translation: 描述了用于减轻发动机的跳火操作期间的动力传动系振动的各种方法和装置。 一方面，传动系部件（例如变矩器离合器）的滑动至少部分地基于跳过火焰运行期间的跳火特性（例如点火分数，选择的点火顺序/图案等） 一个引擎 传动系组件滑动的调制也可以作为一个或多个发动机操作参数（诸如发动机转速和/或指示燃烧气缸的输出的参数（例如大气压））的函数而变化。
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公开(公告)号：US20220372925A1
公开(公告)日：2022-11-24
申请号：US17883338
申请日：2022-08-08
Applicant: Tula Technology, Inc. , Cummins Inc.
Inventor： Xin YUAN , Shikui Kevin CHEN , Jennifer K. LIGHT-HOLETS , Scott R. BARDAKJY
Abstract: A system and method of integrating an engine having dynamic skip fire control with an exhaust gas recirculation system in a turbocharged internal combustion engine is described. An engine control system determines an appropriate firing pattern based at least in part on a desired exhaust gas recirculation flow rate. Signals from sensors in the intake manifold and exhaust system may also be used as part of a feedback loop to determine a desired exhaust gas recirculation flow rate.
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Patent Agency Ranking
公开(公告)号：US20210396189A1
公开(公告)日：2021-12-23
申请号：US17463814
申请日：2021-09-01
Applicant: Tula Technology, Inc.
Inventor： Louis J. SERRANO , Xin YUAN , John W. PARSELS , Mohammad R. PIRJABERI , Mark A. WILCUTTS , Masaki NAGASHIMA
Abstract: 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：US20200158044A1
公开(公告)日：2020-05-21
申请号：US16749607
申请日：2020-01-22
Applicant: Tula Technology, Inc.
Inventor： Masaki NAGASHIMA , Mohammad R. PIRJABERI , Louis J. SERRANO , Xin YUAN , John W. PARSELS , Mark A. WILCUTTS
Abstract: 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：US20200072152A1
公开(公告)日：2020-03-05
申请号：US16552052
申请日：2019-08-27
Applicant: Tula Technology, Inc.
Inventor： Xi LUO , Jerry F. FUSCHETTO , Xin YUAN , Matthew A. YOUNKINS
Abstract: A vehicle, engine controller and method for coordinating direct split injection of two or more pulses of fuel during a working cycle of a reactivated cylinder which was deactivated in a previous working cycle is described. By using split injection for the reactivated cylinder, the particulate matter and particulate number (“PM/PN”) generated by the reactivated cylinder is reduced.
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公开(公告)号：US20190170074A1
公开(公告)日：2019-06-06
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：US20170306864A1
公开(公告)日：2017-10-26
申请号：US15646476
申请日：2017-07-11
Applicant: Tula Technology, Inc.
Inventor： Mohammad R. PIRJABERI , Louis J. SERRANO , Xin YUAN , Steven E. CARLSON , Siamak HASHEMI , Ryan A. KUHLENBECK
CPC classification number: F02D37/02 , F02D17/02 , F02D41/0002 , F02D41/0087 , F02D2041/286 , F02D2200/0406 , F02D2200/101 , F02P5/1504 , Y02T10/42 , Y02T10/46
Abstract: Methods and arrangements are described for controlling transitions between firing fractions during skip fire operation of an engine in order to help smooth the transitions. Generally, firing fractions transitions are implemented gradually, preferably in a manner that relatively closely tracks manifold filling dynamics. In some embodiments, the commanded firing fraction is altered each firing opportunity. Another approach contemplates altering the commanded firing fraction by substantially the same amount each firing opportunity for at least a portion of the transition. These approaches work particularly well when the commanded firing fraction is provided to a skip fire controller that includes an accumulator functionality that tracks the portion of a firing that has been requested, but not delivered, or vice versa. In various embodiments, commanded firing fraction changes are delayed relative to initiation of the change in throttle position to help compensate for inherent delays associated with changing the manifold air pressure.
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