A utility vehicle includes an electronic control unit configured to control electronically controlled suspension devices. The electronic control unit is disposed in an internal space formed between a front panel and a dash panel and is located at a higher level than a seat portion of a driver seat. In a vehicle width direction, the electronic control unit is located toward a driver seat region of the dash panel with respect to a center region of the dash panel.

A suspension device (S) which is a means for solving the problem of the present invention includes an actuator (AC) movable in a telescopic manner, a pump (4), a liquid pressure circuit (FC) provided between the actuator (AC) and the pump (4) and supplying a liquid discharged from the pump (4) to the actuator (AC) so that the actuator (AC) expands and contracts, and a controller (C) controlling the driving of the pump (4), in which the pump (4) is controlled by obtaining a target rotation number of the pump (4) on the basis of road surface displacement detected by a preview sensor (41).

A suspension system S according to the present invention is configured to control actuators A.sub.FR, A.sub.FL, A.sub.RR, A.sub.RL by determining a pitch damping force F.sub.P and a roll damping force F.sub.R to cancel roll and pitch moments M.sub.P, M.sub.R of a body B, and determining target control forces F.sub.TFR, F.sub.TFL, F.sub.TRR, F.sub.TRL in consideration of the pitch damping force F.sub.P and the roll damping force F.sub.R. When the pitch damping force F.sub.P and the roll damping force F.sub.R are output to the actuators A.sub.FR, A.sub.FL, A.sub.RR, A.sub.RL, the actuators A.sub.FR, A.sub.FL, A.sub.RR, A.sub.RL can each generate a control force for cancelling a force acting on the body B not later but preliminarily.

The height of the center of gravity of a vehicle having at least 3 axles is estimated using the slippage rate of the wheels.

Left and right stabilizer bars are provided between left and right wheels of a vehicle. A control unit controls an actuator to control a rotation angle of the right stabilizer bar with respect to the left stabilizer bar. The control unit determines whether the vehicle is moving, whether a vehicle speed is less than a first threshold value, and whether a vehicle state is in transition from a moving state to a stopped state. A detection unit detects a control amount of the actuator. When the vehicle is moving, the vehicle speed is less than the first threshold value, the vehicle state is in transition from the moving state to the stopped state, and the control amount of the actuator is greater than zero, the control unit decreases the control amount of the actuator such that the control amount of the actuator becomes zero before the vehicle speed becomes zero.

An emergency operating method for operating an active chassis of a motor vehicle in the event of a failure of a pump of the active chassis. The method includes (a) detecting a termination of a proper electrical supply of an electric drive machine of the pump; (b) short-circuiting the electric drive machine operated at high voltage; and (c) disconnecting the high-voltage supply of the electric drive machine.

A method of automatically applying damping force interventions for dynamic weight balancing in a suspension system of a vehicle may include receiving ride height information associated with respective individual wheels of the vehicle and vehicle attitude information from vehicle sensors, determining, based on the ride height information and the vehicle attitude information, whether a trigger event has occurred, and generating a first damping intervention signal to change a damping force applied by a first selected adjustable damper responsive to determining that the trigger event has occurred. The first selected damper may be one of a plurality of adjustable dampers associated with respective ones of the individual wheels of the vehicle. The first selected adjustable damper may be associated with only one of a pair of rear wheels of the vehicle.

A method and apparatus are disclosed for cooling damping fluid in a vehicle suspension damper unit. A damping unit includes a piston mounted in a fluid cylinder. A bypass fluid circuit having an integrated cooling assembly disposed therein is fluidly coupled to the fluid cylinder at axial locations that, at least at one point in the piston stroke, are located on opposite sides of the piston. The cooling assembly may include a cylinder having cooling fins thermally coupled to an exterior surface of the cylinder and made of a thermally conductive material. The bypass channel may include a check valve that permits fluid flow in only one direction through the bypass channel. The check valve may be remotely operated, either manually or automatically by an electronic controller. A vehicle suspension system may implement one or more damper units throughout the vehicle, controlled separately or collectively, automatically or manually.

An automatic tilting vehicle is provided that includes left and right front wheels supported by knuckles, a steerable rear wheel, a vehicle tilting device, and a control unit. The vehicle tilting device includes a swing member, a tilt actuator for swing the swing member, and a pair of tie rods pivotally attached to the swing member and the knuckles. The control unit calculates a target lateral acceleration of the vehicle, estimates a lateral acceleration of the vehicle caused by the gyro moments of the wheels and calculates a target tilt angle of the vehicle based on a sum of the target lateral acceleration and the lateral acceleration caused by the gyro moments.

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.