Vehicle control device
There is provided a vehicle control device that allows high-speed diagnosis of a current breaker while assuring the accuracy of the current flowing to a load during the operation of the load. A smoothing capacitor ( 8 ) is connected in parallel to linear solenoid valves ( 13 a and 13 b ). A current breaker ( 3 a ) and a reverse connection protector ( 4 a ) are connected in series from a battery ( 2 ) to a first connection point (P 1 ) between the linear solenoid valves ( 13 a and 13 b ) and the smoothing capacitor ( 8 ). A discharge unit (DU) is connected to a second connection point (P 2 ) between the breaker ( 3 a ) and the reverse connection protector ( 4 a ) to discharge electric charge from the second connection point (P 2 ).
1. A vehicle control device comprising:
a smoothing capacitor that is connected in parallel to a load;
a first breaker and a second breaker that are connected in series from a power source unit to a first connection point between the load and the smoothing capacitor to shut off current;
a discharge unit that is connected to a second connection point between the first breaker and the second breaker to discharge electric charge from the second connection point; and
a processor configured to:
turn off the first breaker and the second breaker and turn on the discharge unit in a period of time in which the load is operating;
measure a voltage of the second connection point during the period of time in which the first breaker and the second breaker are turned off and the discharge unit is turned on;
compare the measured voltage to a threshold; and
responsive to determining the measured voltage exceeds the threshold, transmit an indication that the first breaker has failed to an external device.
2. The vehicle control device according to claim 1 ,
wherein the discharge unit comprises a switching element configured to turn the connection between the second connection point and the ground on and off.
3. The vehicle control device according to claim 2 ,
wherein the switching element is configured to change the impedance between the second connection point and the ground.
4. The vehicle control device according to claim 1 ,
wherein the discharge unit comprises a resistor that is configured to connect the second connection point and the ground.
5. The vehicle control device according to claim 1 ,
wherein the smoothing capacitor is configured to supply power to the load while the first breaker and the second breaker are turned off and the discharge unit is turned on.
6. The vehicle control device according to claim 1 ,
wherein the processor is configured to turn off the first breaker and the second breaker and turn on the discharge unit at a time in which the current to the load reaches a minimum.