An air suspension control system is for a vehicle with a first and a second axle. The system has an auxiliary control unit connected to a main control unit via a data link. The auxiliary unit has a pressure sensor associated with the first axle for determining pressure measurements of the first axle as pressure sensor signals and an input for receiving height sensor signals. The input can be connected to a first height sensor on the first axle for receiving first height signals and to a second height sensor on the second axle for receiving second height signals. The auxiliary unit is adapted to transmit the first and/or second height sensor signals and/or the pressure sensor signals to the main unit. The main unit is adapted to carry out weighing for the first and/or second axle in dependence on the first and/or second height signals and/or the pressure signals.

A controlled air spring system with a compressed air supply for height regulation of a vehicle includes a number of air springs and a reservoir for the storage of compressed air, a number of switching valves for height regulation, and a controller configured to actuate the number of switching valves. The at least one switching valve is actuated with a number of sequential switching periods and switches over in a switching period, between a first switching state with an open valve state and a second switching state with a closed valve state, the switching period of the number of sequential shifting periods having the open valve state and the closed valve state. The controller is configured to set a speed for a height change of the height regulation. The setting of the speed takes place via an open/closed parameter.

An air suspension system of a commercial vehicle comprises an electronic control device with a level control valve device. A valve element is coupled to a drive element mechanically coupled to a vehicle wheel or axle. In a first relative position of the valve element and a counter valve element, a port for an air suspension bellow is blocked. In a second relative position, the port for the air suspension bellow is connected to a port for an aeration device. In a third relative position, the port for the air suspension bellow is connected to a port for a deaeration device. Control logic generates a control signal for an actuator which, when a level change is set by an operator, correspondingly changes the relative position of the valve element and the counter valve element or the relative position of the counter valve element and a valve housing.

The present disclosure relates to an apparatus and method for controlling a lift axle of a vehicle. To assist with braking according to an operation of a forward collision avoidance (FCA) system by using the lift axle in an emergency braking situation, the vehicle lift axle control apparatus includes a lift axle actuator that drives the lift axle of the vehicle, an interworking device that interworks with the FCA system, and a controller that controls the lift axle actuator based on information obtained from the FCA system.

A vehicle includes a body, a pair of front gas springs coupling a pair of front wheel end assemblies to the body, and a pair of rear gas springs coupling a pair of rear wheel end assemblies to the body. At least one of the rear gas springs includes a cylinder, a rod extending within the cylinder and movable relative to the cylinder, the rod and the cylinder together at least partially defining a chamber having a variable volume and receiving a first pressurized gas therein, and an accumulator in communication with the chamber and containing a second pressurized gas therein. The second pressurized gas within the accumulator is held at a threshold pressure creating a first spring rate when the first pressurized gas is below the threshold pressure and a second spring rate when the first pressurized gas is above the threshold pressure.

A vehicle includes a body, a pair of front gas springs coupling a pair of front wheel end assemblies to the body, and a pair of rear gas springs coupling a pair of rear wheel end assemblies to the body. At least one of the rear gas springs includes a cylinder, a rod extending within the cylinder and movable relative to the cylinder, the rod and the cylinder together at least partially defining a chamber having a variable volume and receiving a first pressurized gas therein, and an accumulator in communication with the chamber and containing a second pressurized gas therein. The second pressurized gas within the accumulator is held at a threshold pressure creating a first spring rate when the first pressurized gas is below the threshold pressure and a second spring rate when the first pressurized gas is above the threshold pressure.

An air suspension system includes: an air suspension interposed between a vehicle body and an axle to adjust a vehicle height according to supply and exhaust of air; a compressor that compresses air; a tank that stores the air compressed by the compressor; and an air dryer provided on an ejection side of the compressor. When the tank has a predetermined pressure or less after air is supplied from the tank to the air suspension, a pressure of the tank is increased by the compressor.

An air suspension system includes: an air suspension interposed between a vehicle body and an axle to adjust a vehicle height according to supply and exhaust of air; a compressor that compresses air; a tank that stores the air compressed by the compressor; and an air dryer provided on an ejection side of the compressor. When the tank has a predetermined pressure or less after air is supplied from the tank to the air suspension, a pressure of the tank is increased by the compressor.

An air suspension system includes an air supply system block including one or more air spring valves, where the one or more air spring valves are disposed within the air supply system block, the air supply system block having a valve block housing. The system further includes the air supply system block pneumatically coupled with one or more air springs, and at least one reservoir coupled with the air supply system block, at least one motor and pump disposed within the air supply system block. The air suspension further includes fast down leveling valves disposed within the air supply system block.

In one embodiment, one or more suspension systems of a vehicle may be used to mitigate motion sickness by limiting motion in one or more frequency ranges. In another embodiment, an active suspension may be integrated with an autonomous vehicle architecture. In yet another embodiment, the active suspension system of a vehicle may be used to induce motion in a vehicle. The vehicle may be used as a testbed for technical investigations and/or as a platform to enhance the enjoyment of video and/or audio by vehicle occupants. In some embodiments, the active suspensions system may be used to perform gestures as a means of communication with persons inside or outside the vehicle. In some embodiments, the active suspensions system may be used to generate haptic warnings to a vehicle operator or other persons in response to certain road situations.