Patent ID: 8086385
Filing Date: 2011-12-27
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
1. A control apparatus for an internal combustion engine, the control apparatus comprising: a variable valve mechanism which makes variable a valve overlap period in which an intake valve open period overlaps with an exhaust valve open period; scavenging effect determination means for determining whether or not a scavenging effect utilization condition in which a scavenging effect using an exhaust pressure pulsation can be effectively utilized is established; and overlap period setting means which controls the variable valve mechanism to set a valve overlap period so as to overlap with a timing at which a trough of the exhaust pressure pulsation comes, after the scavenging effect utilization condition is established; wherein the overlap period setting means includes overlap period limiting means which limits a set value of the valve overlap period such that an increase amount of a torque index value associated with the setting of the valve overlap period does not exceed a predetermined permissible value.