Daimler Chrysler Ag

Hanns Hoffmann

Wolfgang Widmann

In an arrangement and method for controlling a supercharged internal combustion engine having a charger arranged in the air intake duct and a catalytic converter arranged in the exhaust duct, with a secondary air duct including a control valve extending from a point of the intake duct downstream of the charger and upstream of a first throttle member to a point of the exhaust duct upstream of the catalytic converter, a second throttle member is arranged in the intake duct upstream of the charger and the throttle members and control valve are controlled by a control unit in such a way that sufficient air is supplied to the exhaust duct upstream of the catalytic converter such that, during engine warm-up, combustion takes place in the catalytic converter causing rapid heat-up of the catalytic converter.

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Stuttgart, Germany

Hanns Hoffmann