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AssigneeVitesco Technologies Gbmh
InventorsFranz Pfeilschifter, Reinhard Weinzierl
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A method for detecting an insulation fault in a vehicle on-board electrical system having an HV and LV on-board electrical system branches. The LV branch has at least one first LV potential and a second LV potential that differs therefrom and corresponds to a ground potential of the vehicle on-board electrical system. The HV branch has positive HV negative HV potentials. These HV potentials are DC-isolated from the LV branch potentials. An insulation fault between at least one of the HV potentials and the first LV potential is detected by identifying a current flow. The current flow runs through a voltage limiting circuit connected between the ground potential and the first LV potential. This circuit connects the first LV potential, via a plurality of diodes, to a voltage limiting element connected to the ground potential of the vehicle on-board electrical system. A vehicle overvoltage protective circuit is also described.
A method for detecting an insulation fault in a vehicle on-board electrical comprising:
A vehicle overvoltage protective circuit having a ground connection and a plurality of LV potential connections,
Dependencies are inferred from the claim text.