The invention concerns an electronic parking brake system (2), comprising an air supply (4), a check valve (6), connected to the air supply, an electro-pneumatic control unit (8), at least one park brake actuator (10), a relay valve (12), comprising a first port (12a) connected to the check valve, a second port (12b) connected to the electro-pneumatic control unit, a third port (12c) connected to the park brake actuator and a fourth port (12d) which is in communication with the atmosphere, and an electrically actuated valve (14), which is controlled by the electro-pneumatic control unit (8) and which includes a first orifice (14a) connected to a compressed air line (16) extending between the check valve and the air supply, a second orifice (14b), a third orifice (14c) connected to the electro-pneumatic control unit (8), and preferably a vent orifice. The second orifice (14b) is connected to another compressed air line (18) extending between the check valve (6) and the first port (12a) of the relay valve (12).

A module for providing control signals for a brake system of a vehicle which has a supply source, including: at least one interface to be connected to a compressed-air source; at least one interface to transmit the control signals to at least one processing unit for the purposes of generating brake pressures; wherein the module is configured to be provided with a supply by a further supply source. Also described are a related redundancy system, an electronically controlled brake system, and a method.

The present disclosure provides a system and method for removing a residual pressure of compressed air in a motor driven air compressor management system applied to an eco-friendly vehicle. That is, the present disclosure provides a system and a method for removing a residual pressure in a motor driven air compressor management system, which allow a continuous smooth operation of a motor driven air compressor by easily removing a residual pressure of compressed air before a subsequent operation of the motor driven air compressor even though the residual pressure of the compressed air, which fills in an air tank during an operation of the motor driven air compressor, remains according to a tuning off of the motor driven air compressor.

A method and a system are provided for adjusting a pressure of a medium to a target pressure. The method includes: providing a pneumatic structure in which the medium is at a medium pressure that is a starting pressure; providing an adsorptive material operable within a range of temperatures that is proportionate with a range of medium pressures at which the pneumatic structure is operable; and adjusting a temperature of the adsorptive material to effect an adjustment of the medium pressure to the target pressure for performing a selected function. The system performs the method and includes the absorptive material and at least one regulator for adjusting the temperature of the adsorptive material.

A vehicle braking system includes a primary system including at least one pneumatic brake pipe control valve, and a secondary back-up system configured to facilitate vehicle braking without human intervention. The secondary back-up system includes a first air reservoir coupled to supply pressurized air to the at least one pneumatic brake pipe control valve, a second air reservoir, a choke adapted to allow airflow at a specified airflow rate, and a solenoid valve adapted to selectively couple and decouple the first air reservoir and the second air reservoir via the choke, according to an energization state of the solenoid valve.

An automatic braking system and method are provided for controlling the automatic operation of a pneumatic (air) brake system installed on commercial highway vehicles and the like, particular heavy trucks and buses. When a possible collision is detected or an object is detected in proximity to at least one side and/or end of the vehicle, the system automatically operates the existing, factory installed air braking system of the vehicle to avoid a collision or mitigate the collision impact by concurrently pressurizing each of the rear and front pneumatic service brakes of the vehicle. Pressing the existing vehicle brake pedal deactivates the automatic braking system, thereby permitting the driver to take over control of braking at any time.

An apparatus and method for automatic actuation and control of an air braking system on a commercial vehicle, under a warning of collision conditions, having multiple stages of operation, which supplements the normal brake pedal activation and control of the air brake operation under the driver's foot control. A modification to a standard air brake system structure enables the addition of the automatic activation and control stages. When an impending collision signal is received, an activation component operates valves to pressurize the rear brakes followed by pressurizing the front brakes, if necessary. The driver can deactivate the automatic braking functions by stepping on the brake pedal or by operating the vehicle turn signals.

The present disclosure provides a system and method for removing a residual pressure of compressed air in a motor driven air compressor management system applied to an eco-friendly vehicle. That is, the present disclosure provides a system and a method for removing a residual pressure in a motor driven air compressor management system, which allow a continuous smooth operation of a motor driven air compressor by easily removing a residual pressure of compressed air before a subsequent operation of the motor driven air compressor even though the residual pressure of the compressed air, which fills in an air tank during an operation of the motor driven air compressor, remains according to a tuning off of the motor driven air compressor.

Disclosed is a valve arrangement for aerating spring accumulator brake cylinders in a trailer vehicle with a pneumatic braking system, the valve arrangement having a first connection for a line connected to a reservoir of the trailer vehicle, a second connection for a line leading to the spring accumulator brake cylinders, and a first pneumatic control input, wherein the first connection can be connected to the second connection depending on the pressure on the first pneumatic control input. The first control input is connected to a line connected to a control connection of the trailer vehicle or to a line connected to the reservoir. A valve unit, a pneumatic braking system, a method of operating the same, and a trailer vehicle including the same are also disclosed.

A trailer control valve comprises a valve electronic control port adapted to receive an electronic control signal; a valve pneumatic supply port unrestrictedly fluidly communicating with a first supply of a pneumatic fluid; a valve pneumatic control port normally proportionally fluidly communicating with a second supply of the pneumatic fluid based on a pressure representing a driver brake demand, the first supply of the pneumatic fluid being in an independent pneumatic circuit from the second supply of the pneumatic fluid; and a valve delivery port selectively fluidly communicating with at least one of the valve pneumatic supply port and the valve pneumatic control port based on the electronic control signal, the pressure representing the driver brake demand and a pressure of the first supply of the pneumatic fluid. A first pneumatic check valve includes a first check valve supply port fluidly communicating with the first supply of the pneumatic fluid; and a first check valve delivery port fluidly communicating with the relay valve pneumatic supply port. The first pneumatic check valve controls the fluid communication of the first supply of the pneumatic fluid with the relay valve pneumatic supply port based on the pressure of the first supply of the pneumatic fluid at the valve pneumatic supply port.