Patent ID: 7011054
Filing Date: 2006-03-14
Classification: F02D,Y02T

Abstract:
1. An apparatus for controlling valve actuation in an internal combustion engine having intake and exhaust valves, wherein the apparatus controls valve actuation of the intake valve and valve actuation of the exhaust valve each to be a corresponding predetermined target valve actuation, the apparatus comprising: first computation section, wherein, according to an operation state of the engine, the first computation section computes the target valve actuation of a first valve and a target valve overlap amount of the valves, the first valve being one of the intake valve and the exhaust valve, and wherein, based on the computed target valve overlap amount and an actual valve actuation of the first valve, the first computation section computes the target valve actuation of a second valve, the second valve being the other one of the intake valve and the exhaust valve; second computation section, wherein, according to the operation state of the engine, the second computation section computes the target valve actuation of the intake valve and the target valve actuation of the exhaust valve; and selecting section that selects, as the target valve actuation of the intake valve and the target valve actuation of the exhaust valve, one of the computation result of the first computation section and the computation result of the second computation section according to the operation state of the engine, and wherein the selecting section selects the computation result of the second computation section when load on the engine is no less than a predetermined value.