Patent ID: 9333953
Filing Date: 2016-05-10
CPC Classification: B60T,F16D

Claim Text:
1. An electric parking brake system comprising: an electric motor; a linear motion mechanism that converts a rotational movement of a rotor shaft of the electric motor to a linear movement of a slide member to operate a brake; a locking mechanism that fixes a position of the slide member; a control device that controls the electric motor and the locking mechanism; a brake load estimation unit that estimates an actually acting braking force; and an electric parking brake operation instruction device that is arbitrary operable; wherein the control device automatically executes a parking brake operation when a stop state of the vehicle is detected even if the electric parking brake operation instruction device is not operated; and an automatically applied parking brake force at time of the parking brake operation executed when the stop state is detected is set to a value smaller than a normal parking brake force at time of normal parking brake operation by the operation of the parking brake operation instruction device.