Abstract: A brake system, in particular for utility vehicles is provided. A compressed-air-operated brake system (10) which is used, in particular, in utility vehicles, has a multi-circuit brake system having a front-axle brake circuit (20) and a rear-axle brake circuit (13). Here, a load emptying valve (12) is provided in the front-axle brake circuit (20) in order to influence the braking force which is adapted to the loading of the vehicle. The braking force or the brake pressure in the rear-axle brake circuit (13) is predefined by means of an automatically load-dependent braking force regulating process as a function of the load acting on the rear axle. The load emptying valve (12) is actuated by a fluidic connection (16) from the rear-axle brake circuit. A check valve (17) is provided for shutting off the fluidic connection (16) between the load emptying valve (12) and the rear-axle brake circuit (13) when a brake slip regulating process is carried out at the rear axle.

Abstract: A vehicle is equipped, inter alia, with a main drive engine, an electric motor, an air compressor and with an electric current source. To permit an energy-optimized, functional operation of the air compressor, the air compressor is driven by the main drive engine provided the main drive engine is running at sufficient speed, or otherwise, as required, by an electric motor, for example, via a power take-off transmission. In this context, the air compressor provides the process air required for the operation of a fuel cell that also supplies the electric motor.

Abstract: A pressure medium actuated braking system comprises at least first and second braking circuits, and a multi-circuit braking power imparting device, such as a motorcar brake valve. The first braking circuit assigned to, e.g., the rear axle, has a first pressure medium storage container, at least one braking cylinder, and a first control valve system which connects the braking cylinder to the first pressure medium storage container or to a pressure medium sink (atmosphere) depending on a first control signal produced by the motorcar brake valve. The second braking circuit, assigned to, e.g., the front axle, has a second pressure medium storage container, first and second braking cylinders, and a second control valve system which connects the first and second braking cylinders to the second pressure medium storage container or to a pressure medium sink depending on a second control signal generated by the motorcar brake valve.

Abstract: A pressure medium actuated braking system comprises a first (rear axle) braking circuit, a second (front axle) braking circuit, and a multi-circuit braking power imparting device, such as a motorcar brake valve. The motorcar brake valve produces first and second control signals for the first and second braking circuits. The first braking circuit has a first pressure medium storage container assigned to it, at least one braking cylinder, and a first control valve system which connects the braking cylinder to the first pressure medium storage container or to a pressure medium sink (atmosphere) depending on the first control signal. The second braking circuit has a second pressure medium storage container, first and second braking cylinders, and a second control valve system. The second control valve system comprises first and second control valves assigned to the first and second brake cylinders respectively of the second braking circuit.