초록 ▼

An improved hydraulic control unit for brake systems incorporating antiskid control apparatus which eliminates impacts on the brake pedal during an antiskid regulation cycle, which is of simpler design than known prior art and which requires less accumulator energy includes a control piston disposed

An improved hydraulic control unit for brake systems incorporating antiskid control apparatus which eliminates impacts on the brake pedal during an antiskid regulation cycle, which is of simpler design than known prior art and which requires less accumulator energy includes a control piston disposed on and spaced from the inlet chamber side of an outlet piston and a piston shaft connected between the outlet piston and the control piston. The control piston defines one boundary of a reaction chamber and a spring disposed in a control chamber disposed on the side of the control piston remote from the outlet piston prestresses the control piston and the outlet in the direction of an outlet chamber disposed on the side of the outlet piston remote from the inlet chamber. A reaction piston defining on one end thereof the inlet chamber and on the other end thereof the other boundary of the reaction chamber is slidably disposed on the piston shaft.

대표청구항 ▼

A control device for hydraulic brake systems having wheel locking regulation apparatus comprising: an outlet piston slidably sealed in a housing bore, one end of said outlet piston defining one boundary of an inlet chamber connected to a master cylinder and the other end of said outlet piston defini

A control device for hydraulic brake systems having wheel locking regulation apparatus comprising: an outlet piston slidably sealed in a housing bore, one end of said outlet piston defining one boundary of an inlet chamber connected to a master cylinder and the other end of said outlet piston defining one boundary of an outlet chamber connected to at least one wheel brake cylinder; a passage disposed coaxially in said outlet piston closable by a valve member held open by means extending from one closed end of said bore defining the other boundary of said outlet chamber when said outlet chamber has its smallest volume, said passage being connected between said inlet chamber and said outlet chamber; a control piston disposed in said bore spaced from said one end of said outlet piston, one end of said control piston spaced from said one end of said outlet piston defining in cooperation with the other closed end of said bore a control chamber selectively coupled to one of a pressure accumulator and a reservoir and the other end of said control piston adjacent said one end of said outlet piston defining one boundary of a reaction chamber connected directly to said accumulator; a piston shaft connected between said one end of said outlet piston and said other end of said control piston to enable movement of said control piston to directly move said outlet piston; a first spring disposed in said control chamber to prestress said control piston and said outlet piston in the direction of said outlet chamber; and a reaction piston disposed in a slidably sealed relation on said piston shaft having a first actuating surface transverse of said bore defining the other boundary of said inlet chamber and a second actuating surface having an area different from the area of said first actuating surface transverse of said bore defining the other boundary of said reaction chamber.