VALVE LIFT CONTROL SYSTEMS AND METHODS FOR ENGINE STARTABILITY

摘要

A startup/shutdown control module selectively generates an engine startup command when an engine of the vehicle is off. A starter control module applies power to a starter motor when the engine startup command is generated. A valve control module, in response to the generation of the engine startup command: operates intake valves of cylinders of the engine in a low lift mode when an engine temperature is less than a predetermined temperature; and operates the intake valves of the cylinders of the engine in a high lift mode when the engine temperature is greater than the predetermined temperature.

主权项

1. An engine control system for a vehicle, comprising:
a startup/shutdown control module that selectively generates an engine startup command when an engine of the vehicle is off; a starter control module that applies power to a starter motor when the engine startup command is generated; and a valve control module that, in response to the generation of the engine startup command:
operates intake valves of cylinders of the engine in a low lift mode when an engine temperature is less than a predetermined temperature; andoperates the intake valves of the cylinders of the engine in a high lift mode when the engine temperature is greater than the predetermined temperature.