Haldex Brake Products Corporation

Haldex Brake Products Aktiebolag

Haldex Aktiebolag

Siegfried Heer

Dudley John Harrison

Carl Mellings

Georg Sulzyc

Stefan Becke

Joachim Noecker

Tobias Tschoeke

Christian Schering

Arne Busch

Ralf Aumüller

Tobias Tschöke

Joachim Nöcker

Dudley Harrison

Fredrik Seglö

The invention relates to an electropneumatic brake system () for a commercial vehicle. The brake system () comprises brake control modules () by which it is possible to generate a brake pressure for service brake cylinders () which can be associated with single vehicle wheels or vehicle wheels of a vehicle axle. According to the invention there is a redundant compressed air supply of the brake control modules () by connecting the brake control modules () both to a compressed air reservoir () as well as to a backup compressed air reservoir ().

Braking system for a commercial vehicle, compressed air processing unit and use of a compressed air processing unit

An air suspension system of a commercial vehicle comprises an electronic control device with a level control valve device. A valve element is coupled to a drive element mechanically coupled to a vehicle wheel or axle. In a first relative position of the valve element and a counter valve element, a port for an air suspension bellow is blocked. In a second relative position, the port for the air suspension bellow is connected to a port for an aeration device. In a third relative position, the port for the air suspension bellow is connected to a port for a deaeration device. Control logic generates a control signal for an actuator which, when a level change is set by an operator, correspondingly changes the relative position of the valve element and the counter valve element or the relative position of the counter valve element and a valve housing.

Electronic control device and control circuit for an air suspension system of a commercial vehicle

A mechanically actuated level control valve device for a commercial vehicle with an air suspension system is a level control valve and comprises a drive element that can be mechanically coupled to a vehicle wheel or axle. A valve element and a counter valve element have a first relative position, wherein the port for the air suspension bellow is closed, a second relative position, wherein the port for the air suspension bellow is connected to the port for the aeration device, and a third relative position, wherein the port for the air suspension bellow is connected to the port for the deaeration device. The valve element is coupled to a rotatable driveshaft of the level control valve by a drive mechanism. An integrated actuator changes the relative position of the valve element and the drive element or the relative position of the counter valve element and a valve housing.

Mechanically actuated leveling valve mechanism

An air processing device for a utility vehicle includes a compressor and two air dryer cartridges. The air dryer cartridges are located in two parallel paths. A control unit controls a regeneration of one of said air dryer cartridges independent from a load phase of the other of said air dryer cartridges.

Air processing device with two air dryer cartridges

A cartridge of an air dryer serves for cleaning compressed air to be used in compressed air supply systems of motor vehicles, especially trucks. The cartridge includes a housing, a pre-filter, a deposit chamber, a coalescing filter, a bypass conduit and a check valve. The deposit chamber is located downstream of the pre-filter. The deposit chamber is filled with a treating substance. The coalescing filter is arranged between the pre-filter and the deposit chamber. The bypass conduit is designed and arranged to bypass the coalescing filter and not to bypass the pre-filter. The check valve is arranged in the bypass conduit in a way that it opens during regeneration of the cartridge.

Cartridge for cleaning compressed air in compressed air supply systems of motor vehicles

The present invention relates to a compressed air processing system. The compressed air processing system includes an inlet connection, a pressure control unit, a multi-circuit protection valve, a plurality of outlet connections, a parking brake connection, an electronic control unit and a valve arrangement. The inlet connection is connected to a conduit coming from a compressor. Each of the outlet connections is connected to a circuit (I, II, and so forth). The parking brake connection is connected to a conduit coming from a parking brake cylinder. The electronic control unit includes an electric input connection for a control signal. The valve arrangement aerates and locks the parking brake connection in a controlled way due to a signal being generated by the electronic control unit. The valve arrangement also deaerates the parking brake connection due to a signal being generated by the electronic control unit.

Compressed air processing system

A compressed air processing apparatus includes a pressure controller, an air dryer, a multi-circuit protection valve and an electronic control unit. A switching valve is designed and arranged to supply compressed air to an air suspension system and to deaerate the air suspension system. The electronic control unit is designed and arranged to control the pressure controller, the air dryer and the multi-circuit protection valve. The electronic control unit is designed and arranged to also control the switching valve of the air suspension system.

Compressed air processing apparatus for compressed air systems of motor vehicles

A compressed air processing system for motor vehicles includes a pressure control unit, an air dryer, a multi-circuit protection valve and an electronic control unit. The electronic control unit controls the valves of the pressure control unit, the valves of the air dryer, the valves of the multi-circuit protection valve and the valves of an air suspension system of the motor vehicle.

Compressed air processing system for motor vehicles

The invention relates to an adaptation of a level of an air suspension element of a vehicle from a starting level to a desired level. Usually, such adaptation is done by opening a control valve connecting an air container with the air suspension element for an opening interval. According to the invention, a control unit determines an estimate for a future point in time for a suitable closing time of the valve. The estimate is determined considering

Method for adaptation of a level of a vehicle with an air suspension element

A compressed air control apparatus for compressed air systems of motor vehicles includes a pressure controller (), an air dryer () and a multi circuit protection valve (). The pressure controller () controls the pressure in the compressed air control apparatus. The pressure controller () includes an outlet valve (). The air dryer () dries the compressed air flowing through the compressed air control apparatus. The multi circuit protection valve () supplies a plurality of circuits (I, II, III, IV, V) with compressed air. The multi circuit protection valve () includes a plurality of overflow valves (), at least one solenoid valve () and a regeneration conduit (). Each of the overflow valves () is associated with one of the circuits (I, II, III, IV, or V). The at least one solenoid valve () arbitrarily operates the overflow valve (), and it controls a regeneration phase of the air dryer () in which water is removed from the air dryer (). The regeneration conduit () connects the solenoid valve () to the outlet valve () of the pressure controller ().

Compressed air control apparatus for compressed air systems of motor vehicles

A compressed air control apparatus for compressed air systems of motor vehicles includes a pressure controller () for controlling the pressure, an air dryer () for drying the compressed air flowing through the compressed air control apparatus and a multi circuit protection valve () for supplying a plurality of circuits (I, II, III, IV, V) with compressed air. The multi circuit protection valve () includes at least one solenoid valve () including a deaerating connection () leading to the atmosphere and a plurality of overflow valves (). Each of the overflow valves () is associated with one of the circuits (I, II, III, IV or V). The overflow valves () include a valve body (), a flow chamber (), a rear chamber (), a first effective surface (), a second effective surface (), a third effective surface () and a spring () being located in the rear chamber (). The valve body () separates the flow chamber () from the rear chamber (). The valve body () has a first side facing the flow chamber () and a second side facing away from the flow chamber (). The overflow valve () has an opening pressure being greater than its closing pressure to allow for limited backflow. The first effective surface is directly impinged with pressure by the solenoid valve. The third effective surface () is arranged either at the first side to be directly impinged with pressure or at the second side to be indirectly impinged with pressure.

Growing community of inventors

Wiesloch, Germany

Siegfried Heer