- Patent Title: Park positions for variable camshaft phasing systems and methods
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Application No.: US14755136Application Date: 2015-06-30
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Publication No.: US09903282B2Publication Date: 2018-02-27
- Inventor: Ramakrishna Tatavarthi , Etsuko Muraji Stewart , Gregory J. York , James R. Yurgil
- Applicant: GM Global Technology Operations LLC
- Applicant Address: US MI Detroit
- Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee Address: US MI Detroit
- Main IPC: F02D13/08
- IPC: F02D13/08 ; F01L1/34 ; F02D13/02 ; F02D41/04 ; F02N11/08 ; F02N19/00 ; F02D41/00

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.
Public/Granted literature
- US20170002751A1 Park Positions for Variable Camshaft Phasing Systems and Methods Public/Granted day:2017-01-05
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