Verfahren zum Betreiben einer Brennkraftmaschine eines Fahrzeugs, insbesondere eines Kraftfahrzeugs sowie Vorrichtung zur Durchführung eines derartigen Verfahrens

摘要

In a process to operate an automotive piston engine with an catalytic exhaust system, the catalyst is heated during a cold start to its operating temperature. During the cold start process, the exhaust valve position is shifted late in comparison with the normal position as measured against the top dead centre and crankshaft angle.