Patent ID: 8708247
Filing Date: 2014-04-29
Classification: B05B,F02M,F23D

Abstract:
1. A method for injecting fuel into the combustion chamber of an internal combustion engine, comprising: feeding fuel with at least one prefeed pump from a tank to at least one high-pressure pump, feeding high-pressure fuel with the high-pressure pump to an injector, wherein the injector has an injection nozzle with an axially movable nozzle needle protruding into a control chamber which can be fed with fuel under pressure and whose pressure is controlled by a control valve which opens or closes at least one inflow or outflow duct for fuel, branching off a partial volume of the fuel as a flushing volume between the prefeed pump and the high-pressure pump, supplying the flushing volume to a flushing channel of the injector, wherein the flushing volume is directly supplied to the control valve such that the flushing volume flows at least partially through the control valve, conducting the flushing volume through a heat exchanger for adjusting the temperature of the flushing volume, wherein the heat exchanger cools the flushing volume during engine operation to lower the temperature load and heats the flushing volume to accelerate the engine start.