A suspension system for a traveling vehicle body is disclosed. The system includes a suspension reference position varying mechanism (18) for varying a reference position of a suspension stroke of the suspension mechanism (100), and a controller (35) configured to calculate an intermediate value from a maximal value corresponding to the maximal position of the suspension stroke and a minimal value corresponding to the minimal position of the suspension stroke, and to control the suspension reference position varying mechanism such that, when the calculated intermediate values deviates from a set target range, the intermediate value is displaced toward the target range. The controller (35) increases a control execution frequency for the suspension reference position varying mechanism (18) when the traveling speed of the vehicle body is low, and reduces the control execution frequency for the suspension reference position varying mechanism (18) when the traveling speed of the vehicle body is high.

A suspension system for a traveling vehicle body is disclosed. The system includes a suspension reference position varying mechanism (18) for varying a reference position of a suspension stroke of the suspension mechanism (100), and a controller (35) configured to calculate an intermediate value from a maximal value corresponding to the maximal position of the suspension stroke and a minimal value corresponding to the minimal position of the suspension stroke, and to control the suspension reference position varying mechanism such that, when the calculated intermediate values deviates from a set target range, the intermediate value is displaced toward the target range. The controller (35) increases a control execution frequency for the suspension reference position varying mechanism (18) when the traveling speed of the vehicle body is low, and reduces the control execution frequency for the suspension reference position varying mechanism (18) when the traveling speed of the vehicle body is high.

An actuator includes a first housing, a second housing fixed to the first housing, and a piston configured to translate relative to each of the first housing and the second housing. The actuator also includes a locking device configured to selectively restrain the piston in a predetermined position relative to each of the first housing and the second housing and release the piston. The actuator additionally includes an actuation mechanism configured to activate the locking device to thereby restrain the piston in the predetermined position. Also disclosed is a suspension system for a vehicle employing such an actuator at a suspension corner, wherein the actuator is used to set a ride height of the vehicle at the suspension corner.

A hydraulic actuator includes an energy recuperation device which harvests the energy generated from the stroking of a shock absorber. The energy recuperation device can function in a passive energy recovery mode for the shock absorber to store recovered energy as fluid pressure or it can be converted to another form of energy such as electrical energy.

The invention relates to the vehicles for off-road driving, both on land and on water, which can be used for construction of vehicles with good cross-country ability, (all-terrain vehicles). An all-terrain vehicle comprises a cabin with a glazing and a door, a passenger compartment, a frame, an engine with an exhaust system, a transmission gearbox, a steering gear, a running gear comprising a final drive system connected with at least two pairs of axle shafts with the wheels mounted on them having the low pressure tires, a suspension connected with the wheel tires, a tire inflation system, a heating system, a control system, is different in that it comprises an air line connected simultaneously with all wheel tires and associated with a tire inflation system. A suspension of an all-terrain vehicle comprises a wheel suspension system connected with the wheel tires, a fluid power drive, and a tire inflation system, is different in that a wheel suspension system is configured as an air line formed by the hollow tubes welded together to make a frame formed by the side members and the cross bars or it is configured outside a frame to form a closed circuit connected with each tire by means of the pipelines with the valve members, whereas as a fluid power drive and a tire inflation system the claimed invention provides an engine exhaust system equipped with a damper and connected with an air line through a pipeline with a valve member.

The invention relates to the vehicles for off-road driving, both on land and on water, which can be used for construction of vehicles with good cross-country ability, (all-terrain vehicles). An all-terrain vehicle comprises a cabin with a glazing and a door, a passenger compartment, a frame, an engine with an exhaust system, a transmission gearbox, a steering gear, a running gear comprising a final drive system connected with at least two pairs of axle shafts with the wheels mounted on them having the low pressure tires, a suspension connected with the wheel tires, a tire inflation system, a heating system, a control system, is different in that it comprises an air line connected simultaneously with all wheel tires and associated with a tire inflation system. A suspension of an all-terrain vehicle comprises a wheel suspension system connected with the wheel tires, a fluid power drive, and a tire inflation system, is different in that a wheel suspension system is configured as an air line formed by the hollow tubes welded together to make a frame formed by the side members and the cross bars or it is configured outside a frame to form a closed circuit connected with each tire by means of the pipelines with the valve members, whereas as a fluid power drive and a tire inflation system the claimed invention provides an engine exhaust system equipped with a damper and connected with an air line through a pipeline with a valve member.

A hydraulic actuator circuit is disclosed for use with first and second shock absorbers, which each may include a piston disposed within a housing. The piston helps define upper and lower working chambers. The circuit may have a motor, a first pump, driven by the motor, and is associated with the first shock absorber and the motor. A second pump, driven by the motor, may be associated with the second shock absorber. A first accumulator communicates with both of the first and second pumps. A first switch valve may assist in controlling fluid flow into the chambers of the first shock absorber. A second switch valve may assist in controlling fluid flow into the chambers of the second shock absorber.

A stopped vehicle height of an air suspension for a stop-side wheel on a side that stops first is determined in consideration of a vehicle height that changes in accordance with a vehicle height change of the air suspension for a supply/discharge-side wheel on another side after a stop. Thus, when vehicle height adjustment of the air suspension for the supply/discharge-side wheel is finished, the stopped vehicle height of the air suspension for the stop-side wheel can be adjusted to the vicinity of a target value and the precision in the vehicle height adjustment can be increased.

A device for adjusting a foot point of a vehicle spring element includes a first wall element for connecting to a vehicle, a second wall element spaced from the first wall element and connecting to the spring element, and a chamber disposed between the first wall element and the second wall element for changing the distance between the first wall element and the second wall element by changing a volume of the chamber, the chamber having an incompressible fluid and the first and/or second wall element including a passage opening for the incompressible fluid to the chamber. In embodiments, the passage opening is fluidly connectable to a supply/discharge device for the incompressible fluid, and the chamber has a chamber wall with a third wall element extending from the first wall element to the second wall element, the mass of which is constant when the volume of the chamber is changed.

A device for adjusting a foot point of a vehicle spring element includes a first wall element for connecting to a vehicle, a second wall element spaced from the first wall element and connecting to the spring element, and a chamber disposed between the first wall element and the second wall element for changing the distance between the first wall element and the second wall element by changing a volume of the chamber, the chamber having an incompressible fluid and the first and/or second wall element including a passage opening for the incompressible fluid to the chamber. In embodiments, the passage opening is fluidly connectable to a supply/discharge device for the incompressible fluid, and the chamber has a chamber wall with a third wall element extending from the first wall element to the second wall element, the mass of which is constant when the volume of the chamber is changed.