A pet mode door and suspension control system and method includes determining whether a door control action has occurred with respect to a door on the vehicle. When determined that the door control action has occurred, the system and method further includes determining whether a pet mode control action is needed. When determined that the pet mode control action is needed, a suspension control command is sent to suspension control system for raising and/or lowering at least one side of the vehicle and a door control command is sent to a power control unit for opening or closing the door in accord with the door control action.

Provided is a tandem lift auxiliary axle suspension assembly for vehicles which can be selectively raised and lowered to adjust the overall vehicle weight to axle ratio. A tandem wheel mount is connected with a pair of torsion rods to a hanger depending from the vehicle frame. An air spring mounted between the beam and the frame dampen axle movement during use. A lift spring is mounted between the hanger and the torsion rods, or other components of the assembly to selectively raise and lower the tandem axles for ground engagement as needed to decrease the weight to axle ratio.

A transverse leaf spring arrangement of a chassis axle of a motor vehicle having a transverse leaf spring which is mounted via two outer bearing members on, in each case, one wheel support and via two central bearing members on a vehicle body. The central bearing members have, in each case, one torque generation apparatus, the torque directions of which run parallel to a longitudinal axis of the motor vehicle. The torque generation apparatus capable of generating a torque which is variable at least in a manner which is dependent on a deflection at the outer bearing members.

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 supply control arrangement for a heavy-duty vehicle comprising a lift axle is provided. An electronically controlled brake valve device allows, when open, pressurized air to be passed to the brake chamber of the lift axle. A pressurized air source supplies pressurized air to the electronically controlled brake valve device along a supply passage. A pilot control valve provided between the pressurized air source and the electronically controlled brake valve device can restrict air flow through the supply passage. A pressure-responsive element actuates the pilot control valve when the pressure in the lift bellow is increased so that the lift axle is raised to a lift condition. The pressure-responsive element closes the pilot control valve. When the pressure in the lift bellow is reduced so that the lift axle is lowered to a ride condition then the pressure-responsive element is deactivated to allow opening of the pilot control valve.

The present disclosure relates to suspension systems, control methods, and vehicles. One example suspension system includes a suspension assembly, a driver, a controller, a compressor, and a gas tank. The suspension assembly has a gas spring and a height sensor. The gas tank contains gas, the gas tank is connected to the compressor through a first ventilation pipe, and the compressor is connected to the gas spring through a second ventilation pipe. A first switch valve is disposed on the first ventilation pipe, and a second switch valve is disposed on the second ventilation pipe. The driver is separately electrically connected to the controller, the compressor, the first switch valve, the second switch valve, and the height sensor. The suspension system is installed between a wheel and a vehicle body of the vehicle.

A leveling valve (101) for discharging and supplying air from and to a plurality of utilization elements (205a,b), in particular pneumatic suspension bellows, includes a valve arrangement (103) for directing air between a source (207) of pressurized air, an exhaust port (3) and the utilization elements (205a,b), and a supply port (1) in fluid communication with the valve arrangement (103) and the source (207) of pressurized air. A check valve (5) is mounted upstream of the valve arrangement (103) and is configured to allow fluid flow from the supply port (1) towards the valve arrangement (103) and to block fluid flow from the valve arrangement (103) through the supply port (1).

A method for operating an active vehicle chassis including a control device; a damper device having a hydraulic cylinder and a hydraulic piston; a pump for generating a pressure via the hydraulic piston; a gas spring having a pneumatic cylinder and a pneumatic piston; and a compressor for generating a pressure via the pneumatic piston. In the case of a command for a request for an increased resulting force of the active chassis with the aid of an increased pressure level in the gas spring, the method includes the steps of increasing the pressure in the damper device by way of the pump; increasing the pressure in the gas spring by way of the compressor; and upon reaching the requested increased resulting force, reducing the pressure in the damper device, such that the increased resulting force is adjusted as required using the increased pressure level in the gas spring.

System, method, and assembly for controlling a vehicle. In one example, the system includes a first suspension system and a first controller. The first controller is configured to receive an input signal representing vehicle operating parameters. The first controller is also configured to receive a first target displacement determined by a second controller for a second suspension system of the vehicle. The first controller is further configured to determine a second target displacement for the first suspension system of the vehicle based on the first target displacement and the input signal. The first controller is also configured to set a height of the first suspension system based on the second target displacement.

A vehicle includes a vehicle body, a road wheel, and a suspension corner connecting the road wheel to the vehicle body. The suspension corner includes a suspension arm connected to the road wheel and to the vehicle body, and also includes a suspension force decoupling system disposed on an axis extending between the suspension arm and the vehicle body. The suspension force decoupling system includes an actuator having an actuator mass arranged on the axis that is configured to output an actuator force in opposite directions along the axis in response to an actuator control signal. The system also includes a compliant element connected along the axis to the actuator mass and one of the body and the suspension arm, and providing a predetermined level of mechanical compliance. A controller determines and generates the actuator force in response to a threshold acceleration of the vehicle body.