Patent ID: 7434397

Claim:
A method for controlling an internal combustion engine, the method comprising: supercharging intake air flowing into the internal combustion engine using an intake compressor of a turbocharger; setting a target position of a waste gate valve to be not in a substantially 0% open, full close position; operating an electric actuator to control a position of the waste gate valve at the target position in a non-transient operating condition of the internal combustion engine, thereby controlling an amount of exhaust gas bypassing an exhaust turbine of the turbocharger; detecting actual charging pressure; setting target charging pressure in accordance with an operating condition for the internal combustion engine; setting the target position of the waste gate valve in accordance with a charging pressure deviation between the target charging pressure and the actual charging pressure; providing a first response to control the waste gate valve when the charging pressure deviation is equal to or greater than a threshold; and providing a second response to control the waste gate valve when the charging pressure deviation is less than a threshold, wherein the first response moves the waste gate valve position more rapidly than does the second response.