DEVICE AND METHOD FOR CONTROLLING POWER TO A VEHICULAR DIFFERENTIAL SPEED CONTROLLER

摘要

A device for controlling power to a vehicular differential speed controller is applied to control a differential speed controller inside a vehicle, and has an input voltage regulation circuit, a trigger circuit, a driving circuit and a relay. The input voltage regulation circuit converts an input voltage into an operating voltage and supplies the operating voltage to the trigger circuit. The trigger circuit generates a trigger signal after receiving a parking brake signal, such that the driving circuit activates the relay according to the trigger signal and supplies an output voltage to the differential speed controller. Accordingly, the present invention can automatically provide a sufficient power supply time to the differential speed controller to switch an operation state of a vehicle differential to a locked state when the vehicle power is switched off and the parking brake is activated.

主权项

1. A device for controlling power to a vehicular differential speed controller, comprising:
an input voltage pin adapted to connect to a vehicle power supply of a vehicle to receive an input voltage; an output voltage pin adapted to connect to at least one differential speed controller; an input voltage regulation circuit connected to the input voltage pin to receive the input voltage and convert the input voltage into an operating voltage; a trigger circuit connected to the input voltage regulation circuit, receiving the operating voltage and a parking brake signal generated by activating a parking brake lever of the vehicle, and outputting a trigger signal lasting for a preset time upon receiving the parking brake signal; a driving circuit connected to the trigger circuit to receive the trigger signal and a power switch signal from the vehicle, and outputting a driving signal when receiving any one of the power switch signal and the trigger signal; and a relay connected between the input voltage pin and the output voltage pin, connected to the driving circuit to receive the driving signal, and controlled by the driving signal to be activated for the output voltage pin to output a voltage to the at least one differential speed controller.