Patent ID: 7669942
Filing Date: 2010-03-02
Classification: B60T,Y10S

Abstract:
1. A braking system comprising: a brake pedal; a stroke sensor that outputs a stroke signal in response to a stroke of the brake pedal; an accumulator that accumulates a pressurized braking liquid; a proportional pressure controller that controls the pressure of the pressurized braking liquid, and supplies the pressurized braking liquid to a wheel, the proportional pressure controller including a spool and a stop plate movably supported at one end of the spool by an elastic member; and a push rod connected to the brake pedal and movable between a first position spaced from the stop plate and a second position contacting the stop plate, wherein the push rod moves in response to the stroke of the brake pedal in order to contact and push the stop plate to thereby move the spool; wherein the proportional pressure controller controls the pressure of the pressurized braking liquid in accordance with the stroke signal and the motion of the push rod during an on-powered condition, and in accordance with only the motion of the push rod during an off-powered condition.