Knorr-bremse Systeme Fuer Nutzfahrzeuge Gmbh

Knorr-bremse Systeme Fur Nutzfahrzeuge Gmbh

Knorr-bremse Fuer Nutzfahrzeuge Gmbh

Knorr-bremse System Fur Nutzfahzeuge Gmbh

Ansgar Fries

Eduard Hilberer

Otto Vollmer

Martin Mederer

Matthew Fry

Michael Muser

Wolfgang Krinner

Istzván Nagy

Szabolcs Savágó

A compressed air supply system for a utility vehicle includes a compressor that can be driven by a drive by a pneumatic clutch, and a valve having a magnetic coil for selectively supplying compressed air to a coupling inlet of the clutch. When the valve is opened or maintained open, a pick-up current flows through the magnetic coil during a first phase, and a holding current weaker than the pick-up current flows through the magnetic coil during a second phase, a driver signal generating the holding current being pulse-width-modulated in the second phase.

Compressed air supply system for a utility vehicle having a pulse-width modulated valve

A compressed air supply system for a utility vehicle includes a compressor that can be driven by a drive by a pneumatic clutch, and a valve that can be actuated by an electrical signal for the selective supply of compressed air to a control input of the clutch. The electrical signal is provided by an electronic control system to which signals indicating an operating state of a compressed air preparation system and various vehicle states can be supplied.

Compressed air supply system for a utility vehicle

A method is provided for controlling and/or regulating the air pressure in a compressed air supply device for a utility vehicle. At least one pressure value in the compressed air supply device and/or in vehicle components connected to the compressed air supply device is recorded. A humidity value representing the humidity content in an air filter unit associated with the compressed air supply device is determined. A clutch connecting a drive to a compressor is opened. A discharge valve of the compressed air supply device is opened when the pressure value is above a predetermined minimum value and the humidity value exceeds a predetermined threshold value. The clutch is opened and the discharge valve remains closed when it is indicated that the clutch can be engaged, the pressure value reaches a predetermined cutting-off pressure, and the humidity value is below the predetermined threshold value.

Method for controlling or regulating the air pressure in a compressed air supply device

The brakes of the front axle of the trailer of a utility vehicle are impinged upon with a brake pressure by way of a single, common ABS valve. Said ABS valve is electrically actuated by an EBS module associated with the rear wheel brakes depending on a differential slip between the front axle and the rear axle.

Braking system for trailers of utility vehicles

In the case of a pressure control device for electropneumatic brake systems of vehicles, particularly utility vehicles, an electromagnetically operable intake valve is provided between a compressed air supply and a consuming device of the brake system. The pressure of the consuming device in the form of a brake cylinder is measured by a pressure sensor and transmitted for the controlled actuating of the intake valve to an electronic control unit. The intake valve is constructed as a valve piston which acts with respect to a valve seat and which, on its approach flow end situated upstream of the valve seat, acts such by means of an intake cross-section which can be changed as a function of the piston stroke, with respect to the housing receiving the valve piston. Thus, according to the values determined by the pressure sensor, a controlled feeding of compressed air is permitted corresponding to the selected contouring. The exhaust valve of the pressure control device, which exists between the consuming device and the outside air, can be contoured in a similar manner so that the piston stroke can have a cross-section-variable effect with respect to the housing.

Pressure control device for electropneumatic brake systems of vehicles,

Switching valve for a multiple-circuit vehicle brake system

Electropneumatic brakes system for motor vehicles

Growing community of inventors

Munich, Germany

Ansgar Fries