Method and device for operating an internal combustion engine

摘要

In a method and a device for operating an internal combustion engine, with at least one cylinder (Z1-Z4) having a combustion chamber (26), fuel is injected into the cylinder and a logic value (LV_FCUT) is set, in particular for stopping the injection of fuel into the cylinder, The method furthermore has the following steps: depending on a course of the highly time-resolved measurement signal of a rotational speed (N_FAST) of the internal combustion engine, a local maximum value (N_FAST_MAX) of the rotational speed is determined, a rotational speed difference (N_FAST_DIF) between the local maximum value (N_FAST_MAX) and a current measured value (N_FAST_MES) of the rotational speed is determined, and, depending on the determined rotational speed difference (N_FAST_DIF), the logic value (LV_FCUT) is set.

主权项

1. A method for operating an internal combustion engine having at least one cylinder with a combustion chamber into which fuel is injected, the method comprising:
determining a local maximum value of a rotational speed of the internal combustion engine as a function of a profile of a temporally highly resolved measurement signal of the rotational speed of the internal combustion engine, determining a rotational speed difference between the local maximum value and a present measurement value of the rotational speed incrementing a counter value when the rotational speed difference is greater than or equal to a predefined threshold value of the rotational speed difference, comparing the incremented counter value to a predefined threshold value of the counter, the predefined threshold value of the counter being greater than one, and in response to determining that the counter value is greater than or equal to the predefined threshold value of the counter, controlling the internal combustion engine to reduce a torque of the internal combustion engine.