Robert Boschgmbh

Bendix Commercial Vehicle Systems LLC

Hermann J Goebels

Helmut Rembold

Klaus-Otto Riesenberg

Ernst Angermair

Christopher M Knaack

This invention achieves a complete dissipation of a residual pressure in a brake cylinder. The air brake system has a pressure control valve arranged between a brake valve and the brake cylinder. This pressure control valve has an outlet valve which controls the connection between an outlet chamber to which the brake cylinder is connected, and a venting space and has a control chamber. A connection between the control chamber and the venting space can be controlled by way of a control valve. There is furthermore a connecting conduit between the outlet chamber and the control chamber of the outlet valve. In the case of a braking operation, the control valve is switched briefly into its open position after the actuation of the brake valve ceases, allowing the residual pressure in the brake cylinder to be dissipated to the venting space via the connecting conduit. The method can be employed in commercial-vehicle air brake systems.

System and method for venting brake cylinders in air brake systems

The invention relates to an electronic brake system, especially for road vehicles. According to the invention, the entire electronic system is split into only two units, which communicate with one another and each of which can control at least two pressures independently of one another. The brake system may be operated pneumatically, or electronically/pneumatically.

Electronic brake system for separately controlling nondriven front

A pressure control valve unit for an anti-locking apparatus in motor vehicle wheel brakes which is actuatable by a control pressure which controls the brake pressure in at least one wheel brake cylinder, the pressure control valve unit having a pressure exchange chamber, which alternatively has brake cylinder pressure and atmospheric pressure, defined by a switching diaphragm and the switching diaphragm comprising the switching member of a relay valve on one side and on the side--like the closing body of a rapid-release valve--is provided the monitor member of a brake cylinder line leading to the outside air so that the pressure control valve unit combines the advantages of relay and switching valves without their disadvantages and the valve unit can be utilized in other fields, which can be accomplished by simple additional switching arrangements and which extend beyond the normal anti-locking protection function.

Pressure control valve unit

A wheel lock prevention apparatus for the brakes of a motor vehicle having a common control of the pressure applied to the brake cylinders of a particular vehicle axle in which a 3/2-way valve is arranged to control pressure in the line leading to the respective wheel cylinders with individual 2/2-way valves located in another line between the respective brake cylinders and ahead of the 3/2-way valve.

Wheel lock prevention apparatus

An improved wheel lock prevention device for use in the brake system of motor vehicles. The device has a relay valve included in assembly with a motor vehicle operator controlled brake velve, a wheel brake cylinder and a source of pressurized air. The relay valve has a primary and secondary pressure side. The primary pressure side is connected to the brake valve and the secondary side is connected to the wheel brake cylinder. A short circuit connection between the primary and secondary pressure sides is provided with a control for effecting a balancing of the pressures on both the primary and secondary pressure sides after the pressure on both sides has been reduced from a peak value by a desired extent during application of the brake system.

Growing community of inventors

Schwieberdingen, Germany

Hermann J Goebels