METHOD FOR THE OPERATION OF A FOREIGN VEHICLE INTERNAL COMBUSTION ENGINE AND FOREIGN VEHICLE INTERNAL COMBUSTION ENGINE OPERATED BY THIS METHOD

摘要

The operation of a spark-ignition internal combustion engine of a vehicle, which is provided with an exhaust gas catalyst, with fuels of very different octane numbers is made possible without endangering the internal combustion engine and the exhaust gas catalyst owing to the fact that, when combustion with knocking occurs, at first the ignition angle is withdrawn up to a particular value, that is, the ignition timing is adjusted in the direction or retarded ignition, and then, in the event of further knocking, the suction pipe length is changed for the purpose of reducing the amount of fuel charged to the cylinder.