Patent ID: 9334811
Filing Date: 2016-05-10
CPC Classification: F02D,Y02T

Claim Text:
1. An engine control system for a vehicle, comprising: an angle determination module that determines a crankshaft angle at which a predetermined percentage of fuel injected into a cylinder was combusted during homogenous charge compression ignition (HCCI) operation of an engine, wherein the angle determination module determines a second crankshaft angle for the cylinder where the predetermined percentage of fuel was combusted during HCCI operation of the engine and determines the crankshaft angle based on an average of the second crankshaft angle and at least one other crankshaft angle; and an exhaust valve control module that determines an exhaust valve closing timing adjustment based on the crankshaft angle, that generates an exhaust valve closing timing for the cylinder based on the exhaust valve closing timing adjustment, and that controls closing of an exhaust valve of the cylinder based on the exhaust valve closing timing.