公开(公告)号：US09903282B2

公开(公告)日：2018-02-27

申请号：US14755136

申请日：2015-06-30

Applicant: GM Global Technology Operations LLC

Inventor： Ramakrishna Tatavarthi ,  Etsuko Muraji Stewart ,  Gregory J. York ,  James R. Yurgil

IPC: F02D13/08 ,  F01L1/34 ,  F02D13/02 ,  F02D41/04 ,  F02N11/08 ,  F02N19/00 ,  F02D41/00

CPC classification number: F02D13/08 ,  F01L1/34 ,  F01L2800/00 ,  F01L2800/03 ,  F02D13/0207 ,  F02D41/042 ,  F02D2041/001 ,  F02N11/0814 ,  F02N19/004 ,  Y02T10/18

Abstract: An engine control system for a vehicle includes a shutdown control module that generates a command to shut down an engine of the vehicle when at least one of: a driver requests the shutdown of the engine via an ignition system; and when one or more predetermined conditions are satisfied for shutting down the engine without the driver requesting shutdown of the engine via the ignition system. A valve control module, when the command to shut down the engine is generated, advances an exhaust camshaft phaser based on a predetermined exhaust park position. When the exhaust camshaft phaser is in the predetermined exhaust park position, an exhaust valve of a cylinder is fully closed during an exhaust stroke of the cylinder before a piston of the cylinder reaches a topmost position for a next intake stroke of the cylinder.

公开(公告)号：US09879616B2

公开(公告)日：2018-01-30

申请号：US15133582

申请日：2016-04-20

Applicant: GM Global Technology Operations LLC

Inventor： Ramakrishna Tatavarthi ,  Andrew J. Kosanka ,  Jinbiao Li

IPC: F01L1/34 ,  F02D13/02 ,  F01L13/00 ,  F02D41/00

CPC classification number: F02D13/0207 ,  F01L13/00 ,  F01L13/0005 ,  F01L13/0015 ,  F01L2013/001 ,  F02D41/0087 ,  F02D2041/0012 ,  F02D2200/101

Abstract: A system according to the present disclosure includes a cylinder deactivation module and a valve lift control module. The cylinder deactivation module selectively deactivates a first cylinder of an engine while a second cylinder of the engine is active. When the first cylinder is deactivated, the valve lift control module selectively adjusts a target lift state of a valve actuator of the engine to a first lift state to lift at least one of an intake valve of the second cylinder and an exhaust valve of the second cylinder by a first amount. The valve lift control module selectively adjusts the target lift state of the valve actuator to a second lift state to lift at least one of the intake valve and the exhaust valve by a second amount. The first and second amounts are greater than zero and the second amount is greater than the first amount.