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公开(公告)号：US08682565B2
公开(公告)日：2014-03-25
申请号：US13735962
申请日：2013-01-07
发明人： Alex O'Connor Gibson , Ross Pursifull , John D. Russell , Joseph N. Ulrey , Gopichandra Surnilla , Donald James Lewis
CPC分类号： F02D45/00 , F02B23/104 , F02B37/00 , F02B2075/125 , F02D13/0207 , F02D13/0219 , F02D13/0261 , F02D13/08 , F02D2013/0292 , F02D2041/001 , F02N11/0814 , F02N19/004 , F02N19/005 , F02N99/006 , Y02T10/123 , Y02T10/18
摘要： Methods and systems are provided for controlling a vehicle system including an engine that is selectively deactivated during engine idle-stop conditions and selectively reactivated during engine restart conditions. One example method comprises, during an engine restart from an idle stop, performing a first combustion event in a cylinder with a piston at an engine crankshaft position that is after a crankshaft position at which said cylinder's exhaust valve opens, and before a crankshaft position at which the cylinder's intake valve closes, during a cycle of said cylinder. In this way, inaccuracies in cylinder aircharge estimation may be reduced, thereby also reducing air-fuel ratio errors and improving the quality and repeatability of engine restarts.
摘要翻译： 提供了用于控制车辆系统的方法和系统，所述车辆系统包括在发动机怠速停止条件期间选择性地停用并且在发动机重起状态期间选择性地重新起动的发动机。 一个示例性方法包括：在从怠速停止的发动机重起期间，在气缸中执行第一燃烧事件，其中活塞位于在所述气缸的排气阀打开的曲轴位置之后的发动机曲轴位置处，以及在曲轴位置 在所述气缸的循环期间气缸的进气门关闭。 以这种方式，可以减少气缸充气估计中的不准确度，从而也降低空燃比误差并提高发动机重新启动的质量和重复性。
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公开(公告)号：US11492990B2
公开(公告)日：2022-11-08
申请号：US17065380
申请日：2020-10-07
发明人： Chris Glugla , Joseph N. Ulrey
摘要： A method for operating an engine during a fuel cut-off mode is disclosed. The method may adjust exhaust valve opening timing and exhaust valve lift of one or more cylinders to heat air flowing through the one or more cylinders so that a temperature of an after treatment device may be maintained or increased.
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