Patent ID: 9522665
Filing Date: 2016-12-20
CPC Classification: B60T

Claim Text:
1. An electronic brake system comprising: a master cylinder including a piston to generate hydraulic pressure by applying pressure to brake oil; an output rod configured to contact the piston; an input rod configured to be moved forward by a driver's manipulation of a brake pedal, and arranged coaxially to the master cylinder and spaced a predetermined isolation gap apart from the output rod contacting the piston of the master cylinder; an electrically-driven booster including a motor, a ball screw to move the output rod, and a motion converting unit to move the ball screw forward and backward by converting rotational movement of the motor into linear movement of the ball screw; and an electronic control unit to control operation of the motor based on the size of the isolation gap between the input rod and the output rod, wherein the electronic control unit stops backward-movement of the ball screw which is moving backward in an anti-lock brake system (ABS) mode such that the output rod does not collide with the input rod.