Patent ID: 6931342

Claim:
Method for calibrating and/or regulating a mixing valve ( 12 ) in a cooling circuit of an internal combustion engine ( 10 ), with which a cooling fluid flow in the cooling circuit can be separated into two partial flows through a heat exchanger ( 16 ) and through a bypass line ( 20 ) respectively as a function of an engine outlet temperature (T EO ), a cooler outlet temperature (T CO ) and a target engine inlet temperature (T EItarget ), the method comprising: computing a target mixing ratio (MR target ) of the mixing valve ( 12 ) from the engine outlet temperature (T EO ), the cooler outlet temperature (T EO ) and the target engine inlet temperature (T EItarget ), computing an actual mixing ratio (MR real ) of the mixing valve ( 12 ) from the engine outlet temperature (T EO ), the cooler outlet temperature (T CO ) and the actual engine inlet temperature (T EIreal ), computing a correction value (Δx) for a valve control value (u valve ) of the mixing valve ( 12 ) from the actual mixing ratio (MR real ) during operation, and adding the correction value (Δx) to the valve control value (u valve ).