Electric parking brake device
An electric parking brake device is associated with a service brake configured to generate a brake force in accordance with an operation input of a vehicle user, and configured to enable a parking brake configured to generate a brake force with a function of an electric actuator having operation controlled by a control unit. The control unit is configured to: (i) start to count in response to an end of detection of the service brake by a service brake detector; and (ii) stop operation of the control unit itself after an elapse of a first predetermined time from the start of the count.
1 . An electric parking brake device which is associated with a service brake configured to generate a brake force in accordance with an operation input of a vehicle user, and which is configured to enable a parking brake configured to generate a brake force with a function of an electric actuator having operation controlled by a control unit, the electric parking brake device comprising:
a service brake detector connected to the control unit and configured to detect whether or not the service brake has been applied after completion of application operation of the electric actuator,
wherein the control unit is configured to:
start to count in response to an end of detection of the service brake by the service brake detector;
stop operation of the control unit itself after an elapse of a first predetermined time from the start of the count;
reset the count in response to the detection of application of the service brake by the service brake detector in the middle of time passage by the count and start recount; and
stop the operation of the control unit itself after an elapse of a second predetermined time from the start of the recount.
2 . The electric parking brake device according to claim 1 , wherein the first predetermined time and the second predetermined time are the same.
3 . The electric parking brake device according to claim 1 , wherein the service brake detector is a hydraulic pressure sensor configured to detect a brake hydraulic pressure for obtaining the brake force by the service brake.
4 . The electric parking brake device according to claim 2 , wherein the service brake detector is a hydraulic pressure sensor configured to detect a brake hydraulic pressure for obtaining the brake force by the service brake.
5 . The electric parking brake device according to claim 1 , wherein the electric actuator coupled to a brake cable to drive a parking brake lever is attached to a drum brake including a wheel cylinder configured to generate the brake force by the service brake, the parking brake lever being configured to operate to obtain the brake force by the parking brake, and the brake cable being coupled to the parking brake lever.
6 . The electric parking brake device according to claim 2 , wherein the electric actuator coupled to a brake cable to drive a parking brake lever is attached to a drum brake including a wheel cylinder configured to generate the brake force by the service brake, the parking brake lever being configured to operate to obtain the brake force by the parking brake, and the brake cable being coupled to the parking brake lever.
7 . The electric parking brake device according to claim 3 , wherein the electric actuator coupled to a brake cable to drive a parking brake lever is attached to a drum brake including a wheel cylinder configured to generate the brake force by the service brake, the parking brake lever being configured to operate to obtain the brake force by the parking brake, and the brake cable being coupled to the parking brake lever.
8 . The electric parking brake device according to claim 4 , wherein the electric actuator coupled to a brake cable to drive a parking brake lever is attached to a drum brake including a wheel cylinder configured to generate the brake force by the service brake, the parking brake lever being configured to operate to obtain the brake force by the parking brake, and the brake cable being coupled to the parking brake lever.