Patent ID: 7814888
Filing Date: 2010-10-19
Classification: F02B,F02D,Y02T

Abstract:
1. A method for operating an internal combustion engine having a cylinder in which a combustion chamber is formed, wherein the combustion chamber is bounded by a piston which is mounted so as to move back and forth in the cylinder, and wherein the piston drives a crankshaft which is rotatably mounted in a crankcasing, having a fuel system which comprises at least one metering valve with an outlet opening for feeding fuel to the internal combustion engine, and with a controller, the method comprising: feeding fuel at a given pressure to the metering valve wherein the controller determines an amount of fuel to be fed; setting by the controller the opening time and the closing time of the metering valve based on the amount of fuel to be fed and taking into account the counterpressure prevailing at the outlet opening of the metering valve; actuating the metering valve in such a way that the metering valve opens and closes at the defined times; wherein the metering valve is used to feed fuel to the internal combustion engine at an overpressure of less than 2 bar above ambient pressure; and wherein approximately 0.0006 g to approximately 0.0015 g of fuel per kilowatt is fed to the internal combustion engine at full load per stroke of the piston with respect to the power of the internal combustion engine.