Method for the emergency starting of an internal combustion engine in the case of a rotational speed sensor failure

摘要

The present invention relates to a method for starting a combustion engine that is equipped with a starter and a speed sensor which supplies an output signal as a function of the speed. Furthermore, a device for measuring the vehicle system voltage is provided which records the characteristic curve (3) of the battery voltage during starting phase (1) and after the starting phase (1). The crankshaft position is ascertained from the characteristic curve (3) of the battery voltage during the starting phase (1) of the combustion engine in starter operation.