A method for operating a pneumatic system of a vehicle is disclosed. The pneumatic system comprises an electronically and/or pneumatically controlled compressor which supplies compressed air during a normal mode and which is switched off or idles when not supplying compressed air. In the method, an ambient temperature (T_Umg) around the pneumatic system is continuously sensed and compared with a predefined target temperature (T_Ziel), a freezing risk is detected when the ambient temperature (T_Umg) reaches or drops below the target temperature (T_Ziel), and when a freezing risk has been detected, a cold mode is activated in which the compressor delivers compressed air also outside delivery phases of the normal mode, and additional compressed air is supplied to pneumatic system components that risk freezing. An additional ON time (ED_zus) of the compressor in the cold mode is variably controlled.

A water separator assembly for an air braking system of a vehicle, including an inlet conduit, a water separator connected to the inlet conduit, an outlet conduit connected to the water separator, and an adjustable bracket operatively arranged to connect the water separator to a deck of the vehicle.

The objective is to improve the oil trapping rate of an oil separator. The oil separator separates gas and liquid in air containing oil, recovers liquid that contains oil. The oil separator is provided with an introduction port for introducing air, an oil trap for trapping oil contained in air, a reservoir for storing the liquid flowing out of the oil trap, and a discharge port for discharging air from which oil has been removed. The oil trap includes a glass fiber filter and an impingement member, which traps oil particles by causing the oil particles to strike the impingement member.

The invention relates to a device for attenuating an exhaust-gas noise, comprising a hollow chamber, which has an inlet for the exhaust gas, and comprising an absorber section, wherein the hollow chamber is closed form at the end spaced apart from the inlet, and the hollow chamber has, between the closed end and the inlet, a passage to the absorber section.

A valve having an inlet, exhaust, control port, and diaphragm. The diaphragm moves between an open position, in which the inlet and exhaust are in fluid communication, and a closed position, in which the diaphragm blocks fluid from flowing between the inlet and the exhaust. The diaphragm moves from the closed position to the open position when an inlet force due to pressure at the inlet is greater than the sum of the biasing force and a control port force due to pressure at the control port. The valve is operable to automatically drain contaminants from a vehicle air reservoir when the vehicle's emergency brakes are set. To reduce noise, the diaphragm of the valve is preferably in tension when in the closed position, and/or the diaphragm opens a limited distance when in the open position so that a back pressure is generated at the inlet.

A compressed-air supply system for operating a pneumatic installation. The compressed-air supply system includes an air supply, the air supply comprising an air compressor unit configured to supply compressed air to a compressed air supply. The compressed-air supply system further includes a compressed air port to the pneumatic installation, an air removal port configured to release air to the environment, and a pneumatic main line between the compressed air supply and the compressed air port, the pneumatic main line comprising an air dryer and a throttle. Furthermore, the compressed-air supply system includes an air removal line between the compressed air port and the air removal port and an exhaust valve connected in the air removal line. The exhaust valve includes a pressure control port connected to the compressed air supply and a pressure counter control port connected to the compressed air port.

An effluent processing apparatus is provided for a vehicle air brake charging system. The effluent processing apparatus comprises an inlet port through which effluent from a purge valve of an air dryer can be received and an outlet port. The effluent processing apparatus also comprises a spiral-shaped effluent channel having a portion of decreasing channel width disposed between the inlet port and the outlet port. The spiral-shaped effluent channel is provided for increasing velocity of an effluent stream as the effluent stream flows through the decreasing channel width portion of the spiral-shaped effluent channel.

An effluent processing apparatus is provided for a vehicle air brake charging system. The effluent processing apparatus has an inlet port through which effluent from a purge valve of an air dryer can be received and an outlet port. The effluent processing apparatus further has a quadric surface defining an effluent flow chamber that is connected in fluid communication between the inlet port and the outlet port. The quadric surface is provided for extracting contaminants from an effluent stream as the effluent stream flows from the inlet port along the quadric surface to the outlet port.

An absorbent apparatus is provided for an air dryer purge air cleaner. The absorbent apparatus comprises a volume for containing absorbent material. The absorbent apparatus also comprises absorbent material that is both oleophilic and hydrophobic and is packed in the volume to provide a packed bed of absorbent material with a predetermined packing density.

Provided is a master cylinder unit including a communication path that causes a master cylinder and a stroke simulator to communicate with each other. The stroke simulator includes a bottomed tube-shaped simulator piston and a simulator cylinder in which a simulator piston slides. The simulator piston is such that a bottom portion of the simulator cylinder and an opening portion of the simulator piston face each other. The communication path is open over an outer circumferential portion and an inner circumferential portion of the opening portion of the simulator piston, is connected to the bottom portion of the simulator cylinder, and is provided such that the communication path extends upward in a vertical direction from the bottom portion of the simulator cylinder as approaching to a pressure chamber.