Patent ID: 9043120
Filing Date: 2015-05-26
Classification: F02D

Abstract:
1. A method for operating an internal combustion engine, the method comprising: determining, via a processor, a speed-based feature of the internal combustion engine, which is correlated with an indicated mean effective pressure of at least one combustion chamber, during the warm-up of the internal combustion engine; and ascertaining, via the processor, an ideal fuel quantity, which is to be injected into the at least one combustion chamber of the internal combustion engine during the warm-up of the internal combustion engine therefrom; wherein the speed-based feature is determined for different quantities of injected fuel to ascertain the ideal quantity, wherefrom a characteristic of the speed-based feature results over the injected quantity, and wherein the injected fuel quantity is ascertained as the ideal quantity in which a value of a derivative of the characteristic corresponds to a threshold value.