A direct injection internal combustion engine comprises: catalysts for purifying exhaust gases, the catalysts being disposed in an exhaust passage of the engine; a control device for controlling the engine so as to warm up or activate the catalysts when th...

A control system (1) for an internal combustion engine is provided which comprises detecting means for detecting a discharge current (i2) flowing between electrodes (17a, 17b) of a spark plug (17) when a high voltage for ignition is applied to the spark pl...

Intake air is unthrottled during part load operation and dependent upon engine parameters. The fuel volume in a second fuel injection resp. after-injection, is regulated/controlled dependent upon intake air throttling in such a way, that a global Lambda ar...