-
公开(公告)号：US20190178135A1
公开(公告)日：2019-06-13
申请号：US16275881
申请日：2019-02-14
Applicant: Tula Technology, Inc.
Inventor： Matthew A. YOUNKINS , Shikui Kevin CHEN , Mark A. WILCUTTS
Abstract: A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner such that the temperature of the aftertreatment element is controlled within its effective operating range.
-
公开(公告)号：US20180156692A1
公开(公告)日：2018-06-07
申请号：US15872675
申请日：2018-01-16
Applicant: Tula Technology, Inc.
Inventor： Shikui Kevin CHEN , Allan J. KOTWICKI , Joel D. VAN ESS , Robert S. BAILEY , Mohammad R. PIRJABERI
CPC classification number: G01M15/05 , F02M35/1038 , G01M15/09
Abstract: A variety of methods, diagnostic modules and other arrangements for detecting air induction faults during operation of an internal combustion engine are described. In some embodiments, the intake manifold pressure is monitored with the intake pressure being read for each induction opportunity. Induction faults may be detected based at least in part on a comparison of the manifold pressure readings for sequential induction opportunities. In some embodiments, an induction fault is identified when the difference between the manifold pressure associated with an induction opportunity and the immediately preceding induction opportunity exceeds an induction fault threshold.
-
Patent Agency Ranking
公开(公告)号：US20170370804A1
公开(公告)日：2017-12-28
申请号：US15701155
申请日：2017-09-11
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.
-
公开(公告)号：US20170101956A1
公开(公告)日：2017-04-13
申请号：US15384924
申请日：2016-12-20
Applicant: Tula Technology, Inc.
Inventor： Matthew A. YOUNKINS , Shikui Kevin CHEN
CPC classification number: F02D41/221 , F02B77/082 , F02D13/06 , F02D17/02 , F02D35/023 , F02D35/024 , F02D41/0087 , F02D41/1401 , F02D41/1448 , F02D41/1498 , F02D41/22 , F02D41/3058 , F02D2041/001 , F02D2041/1412 , F02D2041/1433 , F02D2041/227 , G01L3/00 , G01M15/042 , G01P15/00 , Y02T10/18
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, for each skip fire working cycle, an expected exhaust pressure is determined for a time period corresponding to a potential exhaust event. One or more exhaust gas pressure sensors are then used to measure an actual exhaust pressure during the potential exhaust period. The actual exhaust pressure is compared to the expected exhaust pressure to determine whether a valve actuation fault has occurred. A variety of valve actuation faults can be identified using the described approach. In some embodiments pressure sensors are deployed in the runners of the exhaust manifold.
-
公开(公告)号：US20160109330A1
公开(公告)日：2016-04-21
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.
Abstract translation: 描述了用于检测失火和其它引擎相关错误的各种方法和装置。 在一个方面，将窗口分配给目标工作室的目标发射机会。 在目标发射机会期间试图射击目标工作室。 在窗口期间测量发动机参数的改变（例如，曲轴角加速度）。 使用模型（例如，压力模型）来帮助确定目标发射机会期间的发动机参数的预期变化。 基于预期变化和发动机参数的测量变化的比较，确定是否发生了发动机错误（例如失火）。
-
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。
-
公开(公告)号：US20160024981A1
公开(公告)日：2016-01-28
申请号：US14858046
申请日：2015-09-18
Applicant: Tula Technology Inc.
Inventor： John W. PARSELS , Matthew A. YOUNKINS , Shikui Kevin CHEN
CPC classification number: F01L13/0005 , F01L1/18 , F01L9/02 , F01L9/04 , F01L2013/001 , F01L2820/01 , F01L2820/033 , F01L2820/045 , F02D13/06 , F02D41/0087 , F02D41/1498 , F02D41/22 , F02D2041/001 , Y02T10/18 , Y02T10/40
Abstract: A variety of methods and devices for controlling the operation of the intake and exhaust valves in an internal combustion engine during skip fire operation are described. In various embodiments, an exhaust valve monitor or other suitable mechanism is used to detect exhaust valve actuation faults. When an exhaust valve actuation fault is detected for a particular cylinder, the corresponding intake valve is deactivated (or not activated) in circumstances when it would otherwise be activated in order to prevent the intake valve from opening into a cylinder that contains high pressure combustion gases. The described approach is particularly beneficial when skip fire operation is combined with cylinder deactivation so that air is not pumped through the cylinders during the skipped working cycles.
-
-
-
-
-
-
Search Results
37
records
(took 0.027 seconds)
