Patent ID: 9127601
Filing Date: 2015-09-08
Classification: F02D,Y02T

Abstract:
1. A control system for an engine, comprising: an intake valve actuator that opens an intake valve of a cylinder at a first target opening timing during a first combustion cycle of the cylinder; a cylinder pressure module that receives a cylinder pressure measured by a cylinder pressure sensor of the cylinder and that, at a predetermined crankshaft angle after the intake valve opens during the first combustion cycle, sets a valve opening pressure equal to the cylinder pressure; and a valve control module that receives a reference cylinder pressure and that generates a second target opening timing for a second combustion cycle of the cylinder based on the valve opening pressure and the reference cylinder pressure, wherein the second combustion cycle is after the first combustion cycle, and wherein, during the second combustion cycle, the intake valve actuator opens the intake valve at the second target opening timing.