A vehicle braking system for a vehicle combination includes a first brake axle including a first actuatable brake, a second brake axle including a second actuatable brake, a third brake axle including a third actuatable brake, a first valve controlling actuation of the first actuatable brake and actuation of the second actuatable brake, and a second valve controlling actuation of the second actuatable brake and actuation of the third actuatable brake.

A vehicle braking system for a vehicle combination includes a first brake axle including a first actuatable brake, a second brake axle including a second actuatable brake, a third brake axle including a third actuatable brake, a first valve controlling actuation of the first actuatable brake and actuation of the second actuatable brake, and a second valve controlling actuation of the second actuatable brake and actuation of the third actuatable brake.

A brake control system includes one or more processors communicatively connected to at least one sensor configured to output at least one property measurement of air in a brake pipe of a vehicle braking assembly. The one or more processors are configured to determine, based on the at least one property measurement, a pressure reduction lower limit (PRLL) in the brake pipe. The one or more processors are further configured to control movement of a vehicle system that includes the brake pipe to enforce the PRLL by preventing a pressure reduction in the brake pipe that is less than the PRLL while one or more air reservoirs of the vehicle braking assembly are at a reduced charge state.

A semi-truck to RV conversion device and system is disclosed. The device has a weatherproof electrical enclosure mounted on a semi-truck, which can be attached permanently or removably via, for example, an adjustable strap and fastener. The conversion device features gladhands for connecting to the truck's air lines, a semi-truck light cord plug-in, and an RV-style light cord plug-in for integrating the truck's lighting system with the trailer. The system also incorporates an air-to-electric brake controller that converts air pressure from the truck's braking system into electrical signals to control the trailer's electric brakes, with the braking force on the trailer being proportionate to the air pressure signal for synchronized braking. This system improves safety and enables for quick transitions between hauling different types of trailers.

A method monitoring a pneumatically actuatable brake for motor vehicles, wherein an air gap of the brake is ascertained using measured position values provided by a brake wear sensor, includes ascertaining a reference position value of the brake wear sensor during unbraked travel, determining multiple value pairs of discrete position values and a current brake pressure P at a same point in time during a braking procedure, ascertaining a characteristic function interpolating the value pairs, determining a characteristic position value according to the characteristic function for a selected brake pressure, and determining an actual value of the air gap by subtracting the reference position value from the characteristic position value.

A method monitoring a pneumatically actuatable brake for motor vehicles, wherein an air gap of the brake is ascertained using measured position values provided by a brake wear sensor, includes ascertaining a reference position value of the brake wear sensor during unbraked travel, determining multiple value pairs of discrete position values and a current brake pressure P at a same point in time during a braking procedure, ascertaining a characteristic function interpolating the value pairs, determining a characteristic position value according to the characteristic function for a selected brake pressure, and determining an actual value of the air gap by subtracting the reference position value from the characteristic position value.

A pneumatic booster (40) disposed between a brake pedal (5) and a master cylinder (7) includes a cylindrical member (60) provided on an outer circumferential side of an output rod (58). A seal member (62) seals between an outer circumferential side of the cylindrical member and a cylindrical portion of a front shell, and an O-ring seals between the cylindrical member and the output rod. The cylindrical member causes a differential pressure between a negative pressure chamber (A) and an atmosphere chamber (C) to be applied to a valve body (46). One axial side of the cylindrical member is configured to cause an atmosphere pressure to be applied to the valve body by abutting against a cylindrical protruding portion of the valve body, thereby pushing the valve body with the aid of the differential pressure in the direction as a biasing direction of a return spring.

A military vehicle includes a passenger capsule, a front module, a rear module, and a control system. The front module includes a front frame assembly coupled to a front end of the passenger capsule, a front axle, and a front suspension positioned between the front axle and the front frame assembly. The rear module includes a rear frame assembly coupled to a rear end of the passenger capsule, a rear axle, and a rear suspension positioned between the rear axle and the rear frame assembly. Each of the front suspension and the rear suspension includes a pair of gas springs and a pair of dampers. The control system is configured to monitor a ride height of the military vehicle and control the pair of gas springs of the front suspension and the rear suspension to adjust the ride height as load is added to or removed from the military vehicle.

A door access device for a semi-trailer includes: a lock device to control access to the semi-trailer and a controller for the lock device. The lock device includes a door lock at a door of the semi-trailer, the lock device to be electrically actuated to lock and unlock the door. The controller programmed to: determine that a semi-tractor has established an electrical connection with the semi-trailer; determine whether the semi-tractor is authorized to connect to the semi-trailer; and, in response to a determination that the semi-trailer is authorized to connect to the semi-trailer, actuate the lock device to unlock the door.

A door access device for a semi-trailer includes: a lock device to control access to the semi-trailer and a controller for the lock device. The lock device includes a door lock at a door of the semi-trailer, the lock device to be electrically actuated to lock and unlock the door. The controller programmed to: determine that a semi-tractor has established an electrical connection with the semi-trailer; determine whether the semi-tractor is authorized to connect to the semi-trailer; and, in response to a determination that the semi-trailer is authorized to connect to the semi-trailer, actuate the lock device to unlock the door.