METHOD FOR DETECTING AN ELECTRICAL FAULT IN AN ELECTRICAL NETWORK OF A MOTOR VEHICLE
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Abstract
A method for detecting an electrical fault in an electrical network of a motor vehicle, the network having at least one battery, at least one pulse-controlled inverter and at least one d.c. voltage converter, and an intermediate circuit current associated with the pulse-controlled inverter being detected with the aid of an intermediate circuit current sensor. A battery current associated with the battery is detected with the aid of a battery current sensor and a d.c. voltage converter current associated with the d.c. voltage converter is detected with the aid of a d.c. voltage converter current sensor, and the magnitude of the detected intermediate circuit current is compared with an intermediate circuit current determined by calculation with the aid of the battery current sensor and the d.c. voltage converter current sensor to check whether a specifiable deviation has been exceeded. A method for detecting an electrical fault in an electrical network of a vehicle that is not current-based, but rather voltage-based.
25 Citations
24 Claims
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1-12. -12. (canceled)
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13. A method for detecting an electrical fault in an electrical network of a motor vehicle, the method comprising:
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detecting a battery current associated with at least one battery of the network with the aid of a battery current sensor, wherein the network includes the at least one battery, at least one pulse-controlled inverter, and at least one d.c. voltage converter; detecting an intermediate circuit current associated with the pulse-controlled inverter with the aid of an intermediate circuit current sensor; detecting a d.c. voltage converter current associated with the d.c. voltage converter with the aid of a d.c. voltage converter current sensor; and comparing a magnitude of the detected intermediate circuit current with an intermediate circuit current, which is determined by calculation, with the aid of the battery current sensor and the d.c. voltage converter current sensor; and checking, based on the comparing, whether a specifiable deviation has been exceeded. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method for detecting an electrical fault in an electrical network of a motor vehicle, the method comprising:
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detecting an intermediate circuit voltage associated with at least one pulse-controlled inverter of the network with the aid of an intermediate circuit voltage sensor, wherein the network includes at least one battery, the at least one pulse-controlled inverter, and at least one d.c. voltage converter; detecting, with a d.c. voltage converter voltage sensor, a d.c. voltage converter voltage associated with the d.c. voltage converter; comparing a magnitude of the detected intermediate circuit voltage with the detected d.c. voltage converter voltage; and checking, based on the comparing, whether a specifiable deviation has been exceeded. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification