DETECTION OF A SHORT CIRCUIT, IN PARTICULAR A CREEPING SHORT-CIRCUIT, IN THE POWER SYSTEM OF A MOTOR VEHICLE

摘要

The invention relates, in particular, to a method for detecting a short circuit, in particular a creeping short-circuit, in the power system of a motor vehicle, in particular of a two-wheeled or four-wheeled motor vehicle. The method according to the invention has the following steps: determining a first electrical power strength in at least a first power section of the electrical power system. Applying a first change in voltage, in particular an abrupt change in voltage or a first voltage jump, at least to the first power section of the power system. Determining a second electrical power strength which is increased with respect to the first electrical power strength on the basis of the first change in voltage in the at least first power section in relation to the application of the first change in voltage to the first power section of the power system. Comparing the increase in the electrical power strength in the at least first power section with a second predetermined threshold value, and switching off at least the electrical current with the first electrical power strength at least in the first power section of the electrical power system if the second predetermined threshold value is exceeded.