초록 ▼

A vehicle brake system comprises an actuator which is hydraulically connected in parallel with a power booster between the master cylinder and wheel cylinders of a vehicle. The hydraulic connections include solenoid control valves normally operative to connect the power booster to the wheel cylinder

A vehicle brake system comprises an actuator which is hydraulically connected in parallel with a power booster between the master cylinder and wheel cylinders of a vehicle. The hydraulic connections include solenoid control valves normally operative to connect the power booster to the wheel cylinders and to disconnect the actuator from the wheel cylinders. The valves are responsive to electrical signals generated when vehicle skidding occurs to disconnect the power booster from the wheel cylinders, to connect the actuator to said wheel cylinders, and to supply a pulsating fluid pressure from the actuator to the wheel cylinders in place of the steady fluid pressure normally applied to the wheel cylinders from the power booster, thereby to stop the skid.

대표청구항 ▼

In a vehicle brake system of the type comprising a master cylinder, a power booster adapted to be operatively coupled to said master cylinder, said power booster having an actuating pressure inlet port through which actuating pressure is normally introduced for actuation of said power booster in res

In a vehicle brake system of the type comprising a master cylinder, a power booster adapted to be operatively coupled to said master cylinder, said power booster having an actuating pressure inlet port through which actuating pressure is normally introduced for actuation of said power booster in response to the pressurized fluid from said master cylinder and having a brake pressure ouTlet port from which brake pressure is normally fed to wheel cylinders of the vehicle through a first hydraulic line in response to actuation of said power booster by said actuating pressure, and an anti-skid device in said brake system comprising an actuator hydraulically connected in parallel with said power booster for alternately applying and releasing brake pressure to and from said wheel cylinders independently of said power booster when skidding of the vehicle occurs, a second hydraulic line coupling said actuating pressure inlet port of said power booster to said actuator, a third hydraulic line coupling said actuator to said wheel cylinders, first valve means interposed in said first hydraulic line and operable to effect communication between said brake pressure outlet port of said power booster and said wheel cylinders when the brake is normally applied in the absence of any skidding and operative to interrupt said communication when skidding occurs, second valve means interposed in said second hydraulic line and operable to interrupt communication between said actuating pressure inlet port and said actuator when the brake is normally applied in the absence of any skidding and operative to effect said communication when skidding occurs, discharge valve means interposed in said second hydraulic line between said second valve means and said actuator and operable to effect communication between said second valve means and said actuator when skidding ceases and operative to discharge the pressurized fluid from said actuator when skidding occurs, and third valve means interposed in said third hydraulic line and operable to interrupt communication between said actuator and said wheel cylinders when the brake is normally applied in the absence of any skidding and operative to effect said communication when skidding occurs.