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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsMakoto Yamazaki, Takashi Suzuki, Masaki Kusada
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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.
An operational method of suppressing the discharge of HC in a vehicle equipped with an internal combustion engine that is stopped temporarily upon fulfillment of a predetermined condition for operating the vehicle, which is provided with an HC adsorbent disposed in an exhaust system of the internal combustion engine so as to adsorb HC discharged from the internal combustion engine and an HC oxidation catalyst disposed in the exhaust system so as to oxidize HC discharged from the internal combustion engine, the operational method comprising the steps of:
An HC-discharge suppressing device for a vehicle equipped with an internal combustion engine that is stopped temporarily upon fulfillment of a predetermined condition for operating the vehicle, the HC-discharge suppressing device comprising:
Dependencies are inferred from the claim text.