Patent ID: 8967120
Filing Date: 2015-03-03
Classification: F02D,Y02T

Abstract:
1. An engine control system for controlling an internal combustion engine to perform cylinder deactivation, which deactivates a cylinder in a multi-cylinder internal combustion engine, each cylinder including a piston, an intake valve, and an exhaust valve, wherein, in a deactivated cylinder during the cylinder deactivation, the engine control system opens both the intake valve and the exhaust valve during downstroke of the piston, and opens the intake valve and closes the exhaust valve during upstroke of the piston; and in the deactivated cylinder during the cylinder deactivation, an opening operation and a subsequent closing operation are performed by both the intake valve and the exhaust valve during the downstroke of he piston, and an opening operation and a subsequent closing operation are performed only by the intake valve during the upstroke of the piston.