A machine includes a first cylinder coupled to a first wheel and a second cylinder coupled to a second wheel. A first proportional dampening valve fluidly connects to the first cylinder and a second proportional dampening valve fluidly connects to the second cylinder. First accumulators are fluidly connected to the first cylinder and the first proportional dampening valve, and second accumulator(s) are fluidly connected to the second cylinder and the second proportional dampening valve. Additionally, a first proportional flow control valve fluidly connects to the first cylinder and a second proportional flow control valve fluidly connected to the second cylinder. An electronic control module (ECM) communicatively couples to the first proportional flow control valve and the second proportional flow control valve to adjust a ride height of the first wheel via the first cylinder and a ride height of the second wheel via the second cylinder.

A vehicle with suspension-controlled motion resistance members is provided. The vehicle includes a body and a chassis coupled to a base of the body. The vehicle further includes a motion resistance member that is coupled to a base surface of the chassis, a wheel assembly coupled to the chassis, and a suspension unit coupled to the wheel assembly and the chassis. In an actuated state, the suspension unit is configured to move the chassis in a first direction until at least a portion of the motion resistance member contacts a ground below the base surface of the chassis.

A vehicle height adjustment apparatus according to one embodiment include a spring, a spring-length changing unit, a first valve, a control valve and a second valve. The spring-length changing unit changes a length of the spring in accordance with an amount of oil in a jack chamber that accommodates the oil. The first valve opens and closes a first communication path in which the oil supplied from a pump is oriented toward a reservoir chamber that stores the oil. The control valve opens and closes a discharge flow path oriented toward the reservoir chamber from a chamber that accommodates the oil to close the first valve. The second valve opens and closes a second communication path in which the oil supplied from the pump is oriented toward the jack chamber when the first valve is closed.

A height-adjustable spring arrangement for a vehicle includes a bearing spring, a first limiting cylinder with a first limiting cylinder pot and a first limiting piston, a second limiting cylinder with a second limiting cylinder pot and a second limiting piston, and a guide cylinder with a guide cylinder pot, a displaceable guide piston in the guide cylinder pot and a guide piston rod fixed on the guide piston and extending out of the guide cylinder pot along a longitudinal axis of a bearing spring and through the bearing spring. The guide piston rod is displaceable by the first and second limiting cylinders such that a spring preload acting on the bearing spring and a negative spring path of the bearing spring remain constant as a result of a height adjustment.

A machine includes a first cylinder coupled to a first wheel and a second cylinder coupled to a second wheel. A first proportional dampening valve fluidly connects to the first cylinder and a second proportional dampening valve fluidly connects to the second cylinder. First accumulators are fluidly connected to the first cylinder and the first proportional dampening valve, and second accumulator(s) are fluidly connected to the second cylinder and the second proportional dampening valve. Additionally, a first proportional flow control valve fluidly connects to the first cylinder and a second proportional flow control valve fluidly connected to the second cylinder. An electronic control module (ECM) communicatively couples to the first proportional flow control valve and the second proportional flow control valve to adjust a ride height of the first wheel via the first cylinder and a ride height of the second wheel via the second cylinder.

Chassis arrangement for a motor vehicle for passenger transportation, having two axles which are arranged at a spacing from one another in the motor vehicle longitudinal direction and in each case have wishbones with the incorporation of a spring element for the independent wheel suspension system. A first axle, lying at the front in a driving direction, is lowered from a neutral position by from 5 to 50 mm, 10 to 20 mm, in order to drive in said driving direction, and a second axle, lying at the rear in the driving direction, is raised by from 5 to 50 mm, 10 to 20 mm, in each case by way of adjustment of the spring elements, it being possible for the driving direction to be reversed.

A height-adjustable spring arrangement for a vehicle includes a bearing spring, a first limiting cylinder with a first limiting cylinder pot and a first limiting piston, a second limiting cylinder with a second limiting cylinder pot and a second limiting piston, and a guide cylinder with a guide cylinder pot, a displaceable guide piston in the guide cylinder pot and a guide piston rod fixed on the guide piston and extending out of the guide cylinder pot along a longitudinal axis of a bearing spring and through the bearing spring. The guide piston rod is displaceable by the first and second limiting cylinders such that a spring preload acting on the bearing spring and a negative spring path of the bearing spring remain constant as a result of a height adjustment.

A front suspension wheel for mobile robotic devices that can be compressed into or decompressed out of a main body of a mobile robotic device to facilitate driving the mobile robotic device over obstacles, thresholds and the like. The wheel will provide the mobile robotic device with information such as how fast the wheel is traveling. The wheel is easily removable by hand by the user.

Chassis arrangement for a motor vehicle for passenger transportation, having two axles which are arranged at a spacing from one another in the motor vehicle longitudinal direction and in each case have wishbones with the incorporation of a spring element for the independent wheel suspension system. A first axle, lying at the front in a driving direction, is lowered from a neutral position by from 5 to 50 mm, 10 to 20 mm, in order to drive in said driving direction, and a second axle, lying at the rear in the driving direction, is raised by from 5 to 50 mm, 10 to 20 mm, in each case by way of adjustment of the spring elements, it being possible for the driving direction to be reversed.

A control system for a suspension height adjustment mechanism of a vehicle. The suspension height adjustment mechanism comprises a front suspension height adjustment mechanism at a front end of the vehicle and a rear suspension height adjustment mechanism at a rear end of the vehicle. The control system is configured to control the suspension height adjustment mechanism in response to user-generated control signals to: increase the height of at least the rear end of the vehicle to a first predetermined vehicle height corresponding to a High tow hitch height; and decrease the height of at least the rear end of the vehicle to a second predetermined vehicle height corresponding to a Low tow hitch height. Both the first and second predetermined vehicle heights are accessible from one or more other vehicle height that is different to the first and second predetermined heights. Decreasing the vehicle height from the High tow hitch height to the Low tow hitch height comprises the control system controlling the suspension height adjustment mechanism such that the height of the front end of the vehicle is decreased less than the height of the rear end of the vehicle.