Patent ID: 8635992

Claim:
A method for controlling a temperature of an injector of an injection system for injecting fuel into a combustion chamber of an internal combustion engine, comprising pumping fuel by at least one pre-supply pump from a tank to at least one high-pressure pump, pumping the high-pressure fuel from the high-pressure pump and feeding it to the injector, wherein said injector includes a high-pressure fuel storage arranged inside the injector, a nozzle pre-chamber, a control chamber, an injection nozzle having a nozzle needle that is axially displaceable in the nozzle pre-chamber, wherein the nozzle needle is immersed in the control chamber fed with high-pressure fuel and wherein a pressure of the control chamber is controlled by a control valve opening or closing at least one inlet or outlet channel for fuel, wherein during the standstill of the internal combustion engine, said method comprises branching off a partial amount of the fuel as a flush volume between the pre-supply pump and the high-pressure pump, conducting that partial amount of fuel through a heat exchanger for heating the fuel, and feeding it to the high-pressure fuel storage, so that the flush volume flows through the high-pressure fuel storage.