Power circuit device for vehicles and control method thereof
First Claim
1. A power circuit device for vehicles that controls a selective power supply to a power consumption device from an accumulator comprising:
- a main conductive route that includes at least one relay switched between ON and OFF, and passes a current from the accumulator to the power consumption device;
a grounding portion that grounds a end half portion in the main conductive route closer to the power consumption device than the relay when the relay is turned OFF.
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Accused Products
Abstract
The power circuit device for vehicles is provided with a grounding portion for grounding portions closer to a power consumption device side than a relay of main conductive routes when the relays used for the main conductive routes extending from an accumulator of a vehicle to a fuel heating device, a catalyst heating device, an electric pump, or the like is turned OFF, so that a false power application is not executed even a short-circuit occurs in a part of a power circuit. Also, when two relays are arranged in series, the grounding portion is provided for the relay closer to the power consumption device in order to monitor a voltage level of the main conductive route and make it easy to detect a short-circuit or a disconnection occurrence.
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Citations
18 Claims
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1. A power circuit device for vehicles that controls a selective power supply to a power consumption device from an accumulator comprising:
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a main conductive route that includes at least one relay switched between ON and OFF, and passes a current from the accumulator to the power consumption device;
a grounding portion that grounds a end half portion in the main conductive route closer to the power consumption device than the relay when the relay is turned OFF. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A control method for a power circuit device for vehicles that controls a selective power supply from an accumulator to a power consumption device comprising the step of:
grounding an end half portion in a main conductive route which includes at least one relay and passes a current from the accumulator to the power consumption device, closer to the power consumption device than the relay when the relay is turned OFF. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. The control method according to claim II further comprising the step of:
turning the first relay OFF from ON after turning the second relay OFF from ON, when the power supply from the accumulator to the power consumption device is stopped.
Specification