An electromechanical vehicle height adjustment unit comprises an upper spring pad operative to support an upper end of a vehicle spring, a top mount that is displaceable relative to the upper spring pad, and a displacement mechanism coupled to the upper spring pad and the top mount and operative to displace the top mount relative to the upper spring pad in a height direction. The displacement mechanism comprises a rotary-to-linear motion conversion mechanism and an electric motor.

A motor vehicle, in particular a motorcycle or a motorcycle-like vehicle, includes a wheel suspension supporting the vehicle frame with a spring assembly. The wheel suspension is designed to compress in a compression direction and to rebound in an opposite rebound direction. The wheel suspension includes a lowering device which can be selectively actuated by a pressure fluid in an active state to apply a preload to the wheel suspension to alter a ride height of the motor vehicle.

The present disclosure generally relates to an obstacle avoidance system with active suspensions. The obstacle avoidance system uses one or more active suspensions to lift or jump one or more corresponding wheels over an obstacle in the vehicle's path to avoid contact with the obstacle when the vehicle cannot practically drive over, steer around, or stop before hitting the obstacle.

A concurrent leveling system includes a pressurized air source. A manifold block, having a body defining an air feed inlet, is disposed between air springs and the pressurized air source. The body includes front and rear suspension valves. Each of the suspension valves defines a suspension valve orifice having a first predetermined diameter. The body includes at least one restrictor valve parallel to and in fluid communication with the front suspension valves. The at least one restrictor valve includes a first check valve and a first blocker valve orifice defining a first orifice diameter. The first check valve and the first blocker valve orifice are disposed parallel to one another and in series with the front suspension valves and in fluid communication with the air feed inlet and the front suspension valves for reducing fluid back flow to allow the vehicle to be lowered in nominal loading conditions.

A levelling valve assembly for an air suspension system of a heavy vehicle is provided, including an air valve configured to allow air to either enter or escape from an air spring based on a position of a control arm of the air valve, and including a linkage rod assembly configured to translate movement between a sprung and unsprung mass of the vehicle into a rotation of the control arm to regulate a ride height of the vehicle. The linkage rod assembly further includes a spring and damper arrangement configured to dampen or block movement of the control arm not caused by a change in a mass loading of the vehicle.

A shock assembly with automatically adjustable ride height is disclosed. The shock assembly includes a main chamber with a working fluid therein. A damping piston coupled to a piston shaft, the damping piston disposed in the main chamber to divide the main chamber into a compression side fluid chamber and a rebound side fluid chamber. An automatic ride height adjustment assembly including an internal floating piston (IFP) pump assembly and a spring preload piston assembly.

A shock absorber with a vehicle height adjustment function according to the present invention includes a shock absorber main body that includes a cylinder filled with liquid, a piston that partitions inside of the cylinder into an extension side chamber and a compression side chamber, a piston rod coupled to the piston, a suspension spring that biases the shock absorber main body in an extending direction, a reservoir that accumulates liquid, a damper circuit that is connected to the extension side chamber, the compression side chamber, and the reservoir and generates a damping force in the shock absorber main body at the time when the shock absorber main body expands/contracts, a pump that is able to suck liquid from the reservoir and discharge the liquid, and a switching valve that is installed between the shock absorber main body and the damper circuit and the pump and switches a damper mode in which the shock absorber main body is connected to the damper circuit so as to generate a damping force in the shock absorber main body and a vehicle height adjustment mode in which the shock absorber main body is connected to the pump.

An air management system for a vehicle having a supply tank, a system controller integrated with the supply tank, a first pneumatic circuit pneumatically connected to the system controller, and a second pneumatic circuit pneumatically connected to the system controller. The system controller adjusts independently air pressure of the first pneumatic circuit and the second pneumatic circuit without establishing pneumatic communication between the first and second pneumatic circuits. The system controller establishes pneumatic communication between the first and second pneumatic circuits when the system controller is not adjusting independently the air pressure of the first pneumatic circuit and the second pneumatic circuit.

A vehicle height adjustment device includes a changer, a vehicle speed obtainer, a vehicle height controller, and a malfunction detector. The changer is configured to change a relative position of a body of a vehicle, which includes a plurality of wheels, relative to an axle of each of the plurality of wheels of the vehicle. The vehicle speed obtainer is configured to obtain a vehicle speed, which is a traveling speed of the vehicle. The vehicle height controller is configured to control a vehicle height, which is a height of the body, based on the vehicle speed obtained by the vehicle speed obtainer. The malfunction detector is configured to detect a failure of the vehicle speed obtainer to obtain an accurate value of the vehicle speed.

A vehicle suspension connects a vehicle body to a plurality of wheels and allows relative motion between the vehicle body and the wheels. The suspension system includes a plurality of telescoping multi-stage hydraulic cylinder assemblies arranged to selectively lift the vehicle body relative to the wheels when extended and to lower the vehicle body relative to the wheels when contracted. A control valve is used to adjust a volume of hydraulic fluid in the hydraulic cylinder assemblies to change a height of the vehicle. External spring packs are in fluid connection with the hydraulic cylinder assemblies to maintain spring forces on the suspension system over a range of telescopic movement of the hydraulic cylinder assemblies. Fluid damping valves are provided for damping telescopic movement of the hydraulic cylinder assemblies by restricting fluid flow between the hydraulic cylinder assemblies and the spring packs.