An air distributor block in pneumatic systems of utility vehicles has at least two modules with a body joined together, at least one mounting hole, at least one through-hole, at least one fastening element and seals placed between the modules is characterized by the fact that it comprises two outer modules: the upper module and the lower module equipped with a central coaxial blind hole with the identical hole in the other modules, and each outer module has at least two mounting through-holes parallel to the central axis of the module, in which bolts are mounted, which protrude above the outer modules, terminated on each side with a threaded tip for connecting to the vehicle frame, where in two opposite side walls of each outer module sockets are made with embedded connector elements or sockets equipped with blinding plugs.

An air suspension system, comprising a manifold, defining a first and second port, each port defining a receiving region at the second end, wherein the first and second ports are arranged in a common plane, a channel intersecting the first and second port, a cavity intersecting each port, and a pressure sensor port, positioned between the first and second port, defining a sensor insertion axis normal to the common plane, the pressure sensor port separated from the first port, the second port, and the channel by a thickness; a first and second solenoid valve, each solenoid valve arranged within the cavity and coaxially arranged with the first and second ports, each solenoid valve comprising a connector; a pressure sensor arranged within the pressure sensor port, the pressure sensor comprising a connector; and an electronics module arranged parallel the common plane, the electronics module configured to electrically couple to the connectors.

A vehicle stabilization system including a frame; a wheel; a control arm connected to the frame and the wheel; a fluid spring connected to the frame and the control arm; a stabilizer connected to the frame and operable between a retracted and extended position; a reservoir; and a fluid manifold connected to the fluid spring and the chamber, fluidly coupling the spring interior and stabilizer chamber to the reservoir interior. A vehicle stabilization method including maintaining an orientation of the vehicle frame, coupling the frame to a support surface using a stabilizer by introducing a fluid to a chamber of the stabilizer, and retracting a wheel by reducing a quantity of fluid within a fluid spring coupling the wheel to the frame.

This lift axle device comprises: a first air spring which corresponds to a first axle; a second air spring which corresponds to a second axle that reciprocates between a down position and lift position; an air bellows; a pneumatic circuit which has a solenoid valve; and a control circuit. The control circuit controls the supply of electric power to the solenoid valve. If the pressure transitions to less than a first pressure, the second axle is placed in the lift position. If the pressure transitions to at least a second pressure, the second axle is placed in the down position. If the pressure transitions to at least the first pressure and less than the second pressure, the second axle is caused to maintain the position thereof.

A method of decreasing tire pressure includes opening a wheel valve (22) to allow pressurized air from a tire (10) to be directed to a first valve assembly (14) and to atmosphere. A target pressure is selected for a fluid control conduit (28). The fluid conduit (28) is in fluid communication with the first valve assembly (14) and a second or control valve assembly (30). The pressure in the fluid conduit (28) is measured. If the measured pressure is greater than the target pressure, then the second valve assembly (30) is de-energized. If the measured pressure is less than the target pressure, then the second valve assembly (30) is energized. A valve (42) prone to leak under very low temperatures may be subjected to repeated cycles of pressure application and pressure release in order to form a fluid-tight seal.

An air spring suspension system includes a first air spring that has a first volume with a first pressure that is configured to provide a first spring stiffness to a first suspension assembly. A second air spring has a housing with a second volume with a second pressure that is configured to provide a second spring stiffness to a second suspension assembly. The second air spring includes a piston that is arranged in the second volume. One of the housing and the piston includes a first mounting structure that is configured to connect to a vehicle chassis. Another of the housing and the piston includes a second mounting structure that is configured to connect to the second suspension assembly. The second air spring also includes a fluid connection on the housing. The second air spring further includes a crosslink valve that is disposed in the housing and movable between open and closed positions. The crosslink valve is configured to selectively fluidly connect the second volume to the fluid connection. A crosslink line is fluidly connected to the first volume of the first air spring and the fluid connection on the second air spring. A controller is in communication with the crosslink valve. The controller is configured to command the crosslink valve between the open and closed positions in response to an input.

A vehicle stabilization system including a frame; a wheel; a control arm connected to the frame and the wheel; a fluid spring connected to the frame and the control arm; a stabilizer connected to the frame and operable between a retracted and extended position; a reservoir; and a fluid manifold connected to the fluid spring and the chamber, fluidly coupling the spring interior and stabilizer chamber to the reservoir interior. A vehicle stabilization method including maintaining an orientation of the vehicle frame, coupling the frame to a support surface using a stabilizer by introducing a fluid to a chamber of the stabilizer, and retracting a wheel by reducing a quantity of fluid within a fluid spring coupling the wheel to the frame.

A vehicle fluid supply system includes a fluid supply valve configured to control fluid flow from a vehicle fluid supply to a trunk conduit in fluid communication with a vehicle tire inflation system; and a lift axle valve configured to control fluid flow from the trunk conduit to a lift axle deployment system.

A vehicle stabilization system including a frame; a wheel; a control arm connected to the frame and the wheel; a fluid spring connected to the frame and the control arm; a stabilizer connected to the frame and operable between a retracted and extended position; a reservoir; and a fluid manifold connected to the fluid spring and the chamber, fluidly coupling the spring interior and stabilizer chamber to the reservoir interior. A vehicle stabilization method including maintaining an orientation of the vehicle frame, coupling the frame to a support surface using a stabilizer by introducing a fluid to a chamber of the stabilizer, and retracting a wheel by reducing a quantity of fluid within a fluid spring coupling the wheel to the frame.

An air distributor block in pneumatic systems of utility vehicles has at least two modules with a body joined together, at least one mounting hole, at least one through-hole, at least one fastening element and seals placed between the modules is characterized by the fact that it comprises two outer modules: the upper module and the lower module equipped with a central coaxial blind hole with the identical hole in the other modules, and each outer module has at least two mounting through-holes parallel to the central axis of the module, in which bolts are mounted, which protrude above the outer modules, terminated on each side with a threaded tip for connecting to the vehicle frame, where in two opposite side walls of each outer module sockets are made with embedded connector elements or sockets equipped with blinding plugs.