Abstract: A brake control section can select an automatic mode in which a mechanical brake is automatically transitioned from a released state to a braking state in response to the running condition of a vehicle. A diagnostic section outputs a fail signal when an abnormal condition of the brake control section is detected. A power control section automatically stops a drive power source of the vehicle when the running condition of the vehicle satisfies a predetermined condition for determining a vehicle stop. When the automatic mode of the brake control section is released or when the diagnostic section outputs a fail signal of the brake control section, the power control section is inhibited to automatically stop the drive power source, so that an unintentional movement of the vehicle caused by an inclination of the road surface and the automatic stop of the drive power source can be prevented.

Abstract: An electric parking brake system is equipped with a parking brake driven by an electric actuator for braking wheels of a vehicle, a vehicle condition sensing section for detecting vehicle conditions, a target braking force setting section for setting a target braking force on the basis of vehicle condition detected, compared and weighted by the vehicle condition sensing section so as to overcome a trouble of a part of sensing section, a parking condition detecting section for sensing a change of the vehicle condition from a stopping condition to a parking condition, and a control section for increasing a braking force according to the change in the vehicle condition so as to avoid a creep movement of the vehicle. Thereby, the electric parking brake system with a highly improved reliability can be provided.

Abstract: A brake control section can select an automatic mode in which a mechanical brake is automatically transitioned from a released state to a braking state in response to the running condition of a vehicle. A diagnostic section outputs a fail signal when an abnormal condition of the brake control section is detected. A power control section automatically stops a drive power source of the vehicle when the running condition of the vehicle satisfies a predetermined condition for determining a vehicle stop. When the automatic mode of the brake control section is released or when the diagnostic section outputs a fail signal of the brake control section, the power control section is inhibited to automatically stop the drive power source, so that an unintentional movement of the vehicle caused by an inclination of the road surface and the automatic stop of the drive power source can be prevented.

Abstract: An electric parking brake system is equipped with a parking brake driven by an electric actuator for braking wheels of a vehicle, a vehicle condition sensing section for detecting vehicle conditions, a target braking force setting section for setting a target braking force on the basis of vehicle condition detected, compared and weighted by the vehicle condition sensing section so as to overcome a trouble of a part of sensing section, a parking condition detecting section for sensing a change of the vehicle condition from a stopping condition to a parking condition, and a control section for increasing a braking force according to the change in the vehicle condition so as to avoid a creep movement of the vehicle. Thereby, the electric parking brake system with a highly improved reliability can be provided.