Abstract: The power of internal combustion engines is conventionally determined on special power-test stands on which all connections, in particular coolant connections, of the engine must be fitted. In particular, if a cold test of the internal combustion engine is carried out beforehand, it is necessary for said internal combustion engine to be dismounted from the cold-test stand and mounted on the power-test stand, which is time-consuming. The invention indirectly predetermines the power of the internal combustion engine during the cold test. In this way, the determination of the power can be carried out on the cold-test stand without the need for a power-test stand or for the internal combustion engine to be mounted thereon.

Abstract: A method for determining at least the position of a moving part of the drive assembly, in which the part is illuminated or exposed to light and thereby the passage of light between the moving part and a part which corresponds thereto is determined. The passage of light changes or can even be briefly interrupted during the movement of the part. As a result, it is possible to obtain reliable information about the instantaneous position of the respective part. The method can be used more widely than the known capacitive determination of the position of a moving part and is, in particular, independent of the material of the part.

Abstract: The power of internal combustion engines is conventionally determined on special power-test stands on which all connections, in particular coolant connections, of the engine must be fitted. In particular, if a cold test of the internal combustion engine is carried out beforehand, it is necessary for said internal combustion engine to be dismounted from the cold-test stand and mounted on the power-test stand, which is time-consuming. The invention indirectly predetermines the power of the internal combustion engine during the cold test. In this way, the determination of the power can be carried out on the cold-test stand without the need for a power-test stand or for the internal combustion engine to be mounted thereon.