Patent ID: 6543220
Filing Date: 2003-04-08
Classification: F02D,Y02T

Abstract:
An exhaust emission control apparatus of an internal combustion engine, comprising:a fuel injector which injects fuel into an intake air passage; an intake air flow control valve which controls intake air flow exerting an influence upon a behavior of fuel injected from the fuel injector; a valve actuator which is electrically operated by a storage battery serving as an electric power source to drive the intake air flow control valve; and a control unit connected electrically to at least the valve actuator for controlling an opening of the intake air flow control valve, the control unit having a processor programmed to perform the following, (a) controlling the opening of the intake air flow control valve to a predetermined intermediate valve opening by the valve actuator during an engine stopping period; and (b) holding the intake air flow control valve at the predetermined intermediate valve opening, by inhibiting operation of the valve actuator during an engine-cranking operating mode at an engine restarting period.