A method for the cold start preheating of a supercharged internal combustion engine and / or exhaust aftertreatment device of a vehicle and a motor vehicle, preferably a commercial vehicle.

摘要

method for the cold start preheating of a supercharged internal combustion engine and / or exhaust gas aftertreatment device of a vehicle and motor vehicle, preferably a commercial vehicle. The invention relates to a method for the cold start preheating of a supercharged internal combustion engine and / or exhaust aftertreatment device. The invention further relates to a self-propelled vehicle, especially a commercial vehicle, with a supercharged internal combustion engine, an exhaust after-treatment device and a device for cold-starting preheating of the supercharged internal combustion engine. / or an exhaust after-treatment device. In the method, a cold start aid for the intake air heating with the engine off is arranged within the suction duct. the internal combustion engine comprises at least one working cylinder which respectively has at least one inlet valve which is in connection with the suction duct and at least one outlet valve which is in connection with a exhaust system as well as a device for adjusting a valve position. the internal combustion engine is supercharged with an electric motor operable supercharger. In the method, after acknowledging (s1) a cold start of the internal combustion engine, the following steps are conducted: activation of the cold start aid with the engine off (s2); activation of an electric motor operation of the charge device (s3); and adjusting a valve overlap (s4) between at least one inlet valve and at least one working cylinder outlet valve to deliver at least a portion of the intake air delivered by the supercharger and preheated by the cold start aid directly into the exhaust system.