Method and appliance for operating exhaust gas turbocharger for IC engines with electrically assisted drive based on comparison of actual operating conditions and family of operating characteristics

摘要

The exhaust gas turbine (4) has an electric motor (5) to assist it. Cooled supercharged air drawn from the downstream of the air cooler (8) through a valve (10) cools the motor. The difference between the set value for the supercharged air pressure and the actual value (measured by a sensor (11)), and the turbine speed together with reference to a family of operating characteristics determines when the motor is started. A temperature sensor (16) monitors motor temperature to control the supply of cooling air.