US Patent 9333953 Electric parking brake system
Patent 9333953 was granted and assigned to NTN Corporation on May, 2016 by the United States Patent and Trademark Office.
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An electric parking brake system includes an electric motor; a linear motion mechanism that converts the 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 a brake force; and an electric parking brake operation instruction device that is arbitrary operable. 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. The automatically applied parking brake force is set to a value smaller than the normal parking brake force applied by the parking brake operation instruction device.
US Patent 09333953 Electric parking brake system US Patent 9333953 Electric parking brake system
US Patent 09333953 Electric parking brake system
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