Device and method for controlling a drive unit

Abstract

The invention relates to a method for controlling the operation of an internal combustion engine (B), in particular of an internal combustion engine that drives a motor vehicle. According to said method, a target torque to be produced by the internal combustion engine (B) is determined in several steps. In a first step (21) a torque requested by a user is determined and modified in subsequent steps (22 - 24) by different functions, which reproduce the influences of at least one continuously determined working and / or operating parameter of the internal combustion engine (B) on the torque that is actually produced, in such a way that at the end of steps (21 - 24) the target torque required during the operation of the internal combustion engine (B) is defined and the operation of the internalcombustion engine (B) and the determination of the working and / or operating parameter are monitored for errors. If errors occur, diagnostic values that describe or indicate said errors are generatedand the diagnostic values are used to modify, in particular limit the target torque. The diagnostic values are individually assigned to the individual steps (21 - 24) and are used, when said steps (21- 24) are carried out, to modify, in particular limit the determination or modification of the torque performed in each step.

Description

technical field [0001] The invention relates to a method for controlling the operation of an internal combustion engine, in particular an internal combustion engine driving a motor vehicle, in which the nominal torque to be delivered by the internal combustion engine is determined in a plurality of steps, wherein in a first step the desired torque is determined by the user The requested torque and, in a subsequent step, are determined by the user via various functions reflecting the influence of at least one independently determined operating parameter and / or operating parameter of the internal combustion engine on the torque actually output by the internal combustion engine. The requested torque is modified so that at the end of the sequence of steps the desired setpoint torque required for operation of the internal combustion engine is determined, and a fault in the operation of the internal combustion engine and the ascertainment of the at least one operating parameter and / o...

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Problems solved by technology

[0006] But this approach can lead to the same security-critical situation as described at the beginning

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