HC-discharge suppressing device for vehicle and operational method of suppressing discharge of HC

摘要

The invention provides an HC-discharge suppressing device and an operational method of suppressing the discharge of HC for a vehicle equipped with an engine that has an exhaust system including an HC adsorbent and an HC oxidation catalyst and that is stopped temporarily upon fulfillment of a predetermined condition for operating the vehicle. According to the device and method of the invention, the engine is controlled after cold start thereof in accordance with a temperature of the HC adsorbent and a temperature of the HC oxidation catalyst, in such a manner as to minimize the amount of HC discharged from the exhaust system to the atmosphere. Thus, if such an HC-discharge suppressing device is installed in a vehicle whose engine is frequently started at a low temperature, it becomes possible to reduce the amount of HC discharged from an exhaust system of the vehicle to the atmosphere.