Determining cylinder switching of an internal combustion engine

Abstract

The invention relates to a method for determining cylinder switching (128a) in an internal combustion engine (112), by means of a control unit, preferably a regulator (120) of an electric machine (114) coupled to the internal combustion engine (112). Said method comprises the following steps: determining the temporal course of a rotational speed (122) of an electric machine (114) coupled to the internal combustion engine (112); determining at least one speed pattern (128), produced by the internal combustion engine (112), from the temporal course of the rotational speed (122), the speed pattern (128) having an oscillation (O) superimposed on the temporal course of the mean value (DMD) of the rotational speed (122); then the internal combustion engine (112) is closed to cylinder switching (128a) when a characteristic change in the oscillation (O) is detected for the cylinder switching (128a). Furthermore, the invention relates to a corresponding computing unit (118) which is configuredto carry out the method, to an electric machine (114) comprising the computing unit (118) and to a corresponding computer program for enabling the claimed computing unit (118) to carry out said method.

Description

technical field The invention relates to a method for determining the start and stop of cylinders in an internal combustion engine, as well as to a computing unit, preferably a controller for an electric machine, and to a computer program for carrying out the method. Background technique To regulate the onboard electrical system voltage in a vehicle, electric machines, in particular externally excited electric machines, can be used. The electric machine has a regulator which regulates the field current of the electric machine as a function of the vehicle electrical system voltage. Such an electric machine is known from DE 10 2012 204 751 A1. In addition, so-called intelligent controllers are known which, depending on the operating state of the internal combustion engine detected by the engine controller, correspondingly adjust the field current of the electric machine in order to ensure a correspondingly optimized operation of the internal combustion engine and the electri...

AI Technical Summary

Problems solved by technology

The cylinder on / off operating state is to be understood as the targeted deactivation and / or activation of at least one cylinder of the internal combustion engine, in particular for a corresponding reduction in fuel consumption (cylinder deactivation), or in the event of an increased torque demand on the internal combustion engine This is achieved by activating or opening the inactive cylinders of the internal combustion engine accordingly

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