Method and device for adapting and/or diagnosing an internal combustion engine disposed in a hybrid vehicle

Abstract

The invention relates to a method for adapting and / or diagnosing an internal combustion engine (3) disposed in a hybrid vehicle, forming a drive unit (1, 3) with at least one secondary machine (1). In order to allow a more rapid and simple adaptation and / or diagnostic method of the internal combustion engine (3), a positive or negative drive torque is applied to the internal combustion engine (3) by the secondary machine (1) for setting various operating modes of the internal combustion engine (3), and at least one operating parameter of the internal combustion engine (3) is determined at a set operating point.

Description

technical field

[0001] The invention relates to a method for adapting and / or diagnosing an internal combustion engine arranged in a hybrid vehicle, the internal combustion engine forming a drive unit together with at least one servo machine, and a device for carrying out the method. . Background technique

[0002] A motor vehicle with a hybrid drive has an internal combustion engine and a servomotor, that is, in most cases an electric motor. During driving operation of the hybrid vehicle, a drive torque is therefore applied by the two drive assemblies. For such a hybrid, the internal combustion engine is mechanically coupled to a servo machine. This coupling takes place either directly or via a transmission. The servo machine in the form of an electric motor can be operated either as a motor or as a generator. As an energy store, a high-voltage battery is available, which is discharged when the electric motor is used as drive train drive or charged during generator opera...

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