A vehicle braking system comprising a spring brake actuator having a spring brake chamber, a spring brake control assembly and an immobiliser valve which is movable between brake release position in which the spring brake control assembly is operable to cause the flow of pressurised fluid into the spring brake chamber or to vent the spring brake chamber to a low pressure region, and an immobilise position in which the spring brake control assembly is operable to connect the spring brake chamber to a low pressure region but cannot be operated to cause the flow of pressurised fluid into the spring brake chamber.

The disclosure provides a work vehicle. The work vehicle includes: a frame, a wheel unit connected with the frame, a working unit connected with the frame, and a power source arranged on the frame to supply power. The work vehicle further includes: a brake assembly connected with the wheel unit, a locking assembly, provided with a lock arm to lock the brake assembly, and a starting mechanism. The starting mechanism includes a starting arm connected with the lock arm to drive the lock arm to move when the starting arm is operated to unlock the brake assembly.

A vehicle braking system comprising a spring brake actuator having a spring brake chamber, a spring brake control assembly and an immobiliser valve which is movable between brake release position in which the spring brake control assembly is operable to cause the flow of pressurised fluid into the spring brake chamber or to vent the spring brake chamber to a low pressure region, and an immobilise position in which the spring brake control assembly is operable to connect the spring brake chamber to a low pressure region but cannot be operated to cause the flow of pressurised fluid into the spring brake chamber.

A wireless vehicle trailer monitoring system comprising: a monitoring circuit operatively coupled to a trailer controller, the monitoring circuit configured to detect a fault condition with an associated trailer; a trailer wireless transceiver operatively coupled to the monitoring circuit; and a towing vehicle wireless transceiver operatively coupled to an associated towing vehicle, wherein the trailer wireless transceiver is configured to communication wirelessly with the towing vehicle wireless transceiver

A vehicle braking system comprising a spring brake actuator having a spring brake chamber, a spring brake control assembly and an immobiliser valve which is movable between brake release position in which the spring brake control assembly is operable to cause the flow of pressurised fluid into the spring brake chamber or to vent the spring brake chamber to a low pressure region, and an immobilise position in which the spring brake control assembly is operable to connect the spring brake chamber to a low pressure region but cannot be operated to cause the flow of pressurised fluid into the spring brake chamber.

A overrun brake system includes a gas spring with a gas-tight cylinder and a piston with holes allowing gas to slip through so that the pressure is the same on both sides. Since the free end of the piston has a larger area than the side where the piston rod is located, the gas spring will act as a compression spring. To prevent the overrun brakes from being activated during reversing, the gas spring has a solenoid controlled valve receiving current from the reverse light circuit and closing the flow of gas through the piston when the towing unit's gear is set into reverse. When the gear is set into forward position the solenoid loses its current and a mechanical return spring opens the valve, so that the overrun brakes may act normally again.

A overrun brake system includes a gas spring with a gas-tight cylinder and a piston with holes allowing gas to slip through so that the pressure is the same on both sides. Since the free end of the piston has a larger area than the side where the piston rod is located, the gas spring will act as a compression spring. To prevent the overrun brakes from being activated during reversing, the gas spring has a solenoid controlled valve receiving current from the reverse light circuit and closing the flow of gas through the piston when the towing unit's gear is set into reverse. When the gear is set into forward position the solenoid loses its current and a mechanical return spring opens the valve, so that the overrun brakes may act normally again.

Method and apparatus for providing self-contained brake release capabilities in a tractor trailer to facilitate autonomous movement of the trailer within a controlled environment such as in a yard, depot or other facility. Pressurized air is stored in a reservoir of the trailer while the trailer is in a stationary, parked position. Upon receipt of a wirelessly transmitted brake release command, a trailer controller circuit transitions a flow valve to interconnect the reservoir to a brake assembly to apply pressure sufficient to release the brake assembly and enable rolling movement of a wheel assembly of the trailer. In this way, a yard shifter or other transport vehicle can mechanically engage and move the trailer without the need to provide pressurized air or electrical power to the tractor trailer in order to release the brakes. Security protocols can be used to ensure the brake release operation is performed under authorized conditions.

A control device includes a calculation unit that performs movement control of a moving object, an ESB that adjusts a moving speed of the moving object, and an EPB that adjusts the moving speed of the moving object and is different from the ESB. The calculation unit adjusts, when the moving object is moved by the movement control, the moving speed of the moving object by a braking force of the ESB while applying a braking force of at least one of the ESB and EPB that fixes the moving object, and performs, when the moving object is no longer moved by the movement control, braking control to release the braking force of the EPB and stop the moving object by the ESB and the EPB.

A control device includes a calculation unit that performs movement control of a moving object, an ESB that adjusts a moving speed of the moving object, and an EPB that adjusts the moving speed of the moving object and is different from the ESB. The calculation unit adjusts, when the moving object is moved by the movement control, the moving speed of the moving object by a braking force of the ESB while applying a braking force of at least one of the ESB and EPB that fixes the moving object, and performs, when the moving object is no longer moved by the movement control, braking control to release the braking force of the EPB and stop the moving object by the ESB and the EPB.