The method involves injecting fresh air into an exhaust during cold start phase of an internal combustion engine and expansion phase. An exhaust valve (34) is opened when pressure in a combustion chamber (18) is lower than pressure prevailing at the exhaus...

I.C. engine (1) comprises an exhaust gas turbocharger (7) arranged in the flow path of an exhaust gas arrangement and a compressor (8) arranged in the flow path of an exhaust gas tract. Secondary air is introduced in the flow path of the exhaust gas arrang...

Valve device, especially for a secondary air system of an internal combustion engine, which produces a fluid connection between an inlet channel and an outlet channel on lifting a valve-closing body from a valve seat comprises in the region of the valve se...

The induction system has a secondary air system (8), and an air feed (5) that contains a choke element. The secondary air system contains a turbine (10) and a compressor (11). The turbine is subjected to the choke pressure difference and hence drives the c...

The present invention relates to an internal combustion engine having a catalytic converter to reduce exhaust gas emissions. The engine (2) comprises one or more internal combustion chambers (4), an air supply system (20) for aspirating the combustion cham...