Patent ID: 7765054
Filing Date: 2010-07-27
Classification: F02D

Abstract:
1. A method for operating an internal combustion engine with at least a first combustion chamber and an injector for each combustion chamber for injecting fuel into the at least one combustion chamber, and that exhibits a torque during operation, the method comprising the steps: (a) during an overrun phase of the internal combustion engine, actuating the injector of the first combustion chamber for a predetermined actuation time with a predetermined actuation voltage, (b) detecting a torque variation of the torque of the internal combustion engine, (c) determining from the torque variation of the torque a quantity of fuel of the fuel injected by the injector during the actuation time, (d) after detecting a torque variation of the torque, varying the actuation voltage, (e) repeating the steps (a) to (d) until either the actuation voltage has been varied a preset number of times N or the internal combustion engine is no longer in the overrun phase, and (f) determining an injector characteristic value of the injector of the first combustion chamber from the quantities of fuel and the actuation voltages.