초록 ▼

A braking oil pressure control device for a hydraulically operated anti-skid brake system comprising a pair of serially aligned first and second cylinder chambers defined in a cylinder body on the opposite sides of a partition wall. The first cylinder chamber is divided by a brake piston on the oppo

A braking oil pressure control device for a hydraulically operated anti-skid brake system comprising a pair of serially aligned first and second cylinder chambers defined in a cylinder body on the opposite sides of a partition wall. The first cylinder chamber is divided by a brake piston on the opposite sides thereof into a first brake chamber communicating with a brake master cylinder and a second brake chamber communicating with a wheel brake such that when the pressure in the first brake chamber is pressurized under the action of the master cylinder, the brake piston is moved to pressurize the second brake chamber for actuation of the wheel brake. A control piston is slidably received in the second cylinder chamber and cooperates with the partition wall to define a control chamber communicating with an anti-skid brake control hydraulic circuit. The control piston is connected with the brake piston such that when the control chamber is pressurized by the anti-skid control hydraulic circuit, the control piston is moved together with the brake piston in the direction of reducing an excessive brake pressure in the second brake chamber. A supplementary oil chamber leading to an oil reservoir is formed in the cylinder body and communicates via the second brake chamber with a first seal cup permitting a unidirectional flow of operating oil from the supplementary chamber to the second brake chamber. A second seal cup is interposed between the first and second brake chambers for permitting a unidirectional flow of operating oil from the first brake chamber to the second brake chamber.

대표청구항 ▼

In an anti-skid brake system including: a cylinder body; first and second cylinder chambers serially disposed in said cylinder body on opposite sides of a partition wall; a brake piston slidable in said first cylinder chamber and defining on one side thereof a first braking oil pressure chamber comm

In an anti-skid brake system including: a cylinder body; first and second cylinder chambers serially disposed in said cylinder body on opposite sides of a partition wall; a brake piston slidable in said first cylinder chamber and defining on one side thereof a first braking oil pressure chamber communicating with a master cylinder to receive operating oil therefrom and on the other side a second braking oil pressure chamber containing operating oil and communicating with a wheel cylinder of a wheel brake; a reservoir for operating oil connected to said master cylinder; and a control piston slidable in said second cylinder chamber and cooperating with said partition wall to define therebetween a control oil pressure chamber which is in communication with a control oil pressure circuit, said control piston being connected to said brake piston such that when control oil is supplied from said control oil pressure circuit to said control oil pressure chamber, said control piston is moved together with said brake piston in a direction to reduce excessive brake pressure in said second braking oil pressure chamber; a braking oil pressure control device for the anti-skid brake system comprising: a supplementary oil chamber in said cylinder body communicating with said second braking oil pressure chamber and said oil reservoir; a first seal cup interposed between said supplementary oil chamber and said second braking oil pressure chamber for preventing outflow of the operating oil from said second braking oil pressure chamber to said supplementary oil chamber but permitting inflow of operating oil from said supplementary oil chamber into said second braking oil pressure chamber; and a second seal cup interposed between said first braking oil pressure chamber and said second braking oil pressure chamber for preventing outflow of operating oil from said first braking oil pressure chamber to said second braking oil pressure chamber but permitting inflow of operating oil from said second braking oil pressure chamber to said first braking oil pressure chamber.