Abstract: Provided is a suspension system capable of expanding one of an oil chamber and a gas chamber of an intermediate unit and contracting the other when a damper compresses or expands without generating friction in the intermediate unit. The intermediate unit includes an intermediate case having an intermediate oil chamber connected to an oil chamber of a right damper and the oil chamber of a left damper and an intermediate gas chamber, and a diaphragm made of a flexible material, which partitions the intermediate oil chamber and the intermediate gas chamber.

Abstract: In a suspension system in which the oil chambers of two dampers are connected, the responsiveness of the dampers can be adjusted. A suspension system has a left damper, a right damper, and an intermediate unit. A case of the intermediate unit has an intermediate oil chamber connected to an oil chamber of the left damper and the oil chamber of the right damper and an intermediate gas chamber. The intermediate oil chamber and the intermediate gas chamber are partitioned by a diaphragm. The intermediate unit has a capacity adjustment mechanism including a movable portion of which the position can be changed. The capacity adjustment mechanism adjusts the capacity of the intermediate gas chamber by changing the position of the movable portion.

Abstract: A suspension apparatus includes a pair of hydraulic cylinders and a valve device provided between an upper chamber and a lower chamber of each of the hydraulic cylinders and configured to establish and block communication between these chambers. The valve device includes a first passage and an extension-side damping force generation mechanism. Hydraulic oil flows out from the upper chamber into the first passage due to movement of a piston in a cylinder of the hydraulic cylinder. The extension-side damping force generation mechanism includes a damping valve and a back-pressure chamber. The damping valve is disposed in the first passage and generates a damping force by restricting a flow of the hydraulic oil generated due to a sliding movement of the piston. The back-pressure chamber applies an inner pressure thereof to the damping valve in a valve-closing direction.

Abstract: The present invention relates to an improved control system of the trim of motorcycles with more than two wheels. More in particular, it relates to motorcycles which have at least three wheels and can lean sideways by virtue of the presence of a so-called wheel tilting system. The present invention improves on prior art HTS hydro-pneumatic systems, to improve the vehicle trim, particularly while cornering with the leaned vehicle.

Abstract: A vehicle includes a vehicle body having a structure and a wheel maintaining contact with a road surface. A suspension supports the structure and includes one or more suspension corner assemblies connecting the wheel to the structure and configured to maintain contact between the wheel and the road surface. A secondary actuation system cooperates with the suspension system and is operable to selectively change at least one vehicle operating property. The secondary actuation system includes at least one actuator device operatively connected to the structure at a first end and the one or more suspension corner assemblies at a second end to selectively change at least one vehicle operating property and a spring assembly in fluid communication with the at least one actuator device selectively actuated to adjust an amount of fluid in the at least one actuator device to selectively change the at least one vehicle operating property.

Abstract: A suspension mechanism includes left and right external barrels whose upper ends have left and right ports and lower ends have left and right damper ports, respectively, wherein the left and right external barrels are pivotally connected to a chassis; left and right dampers with lower ends pivotally connected to left and right wheel support units pivotally connected to the chassis, respectively, wherein outer wall surfaces at the upper portions of the left and right dampers movably abut against inner wall surfaces at lower portions of the left and right external barrels through the left and right damper ports, with left and right adjustable spaces defined inside the left and right external barrels, and the left and right adjustable spaces communicating with the left and right ports and filled with oil, respectively; and a control valve connected to the left and right ports and adapted to control oil flow.

Abstract: There is provided a vehicle comprising a chassis, two surface-engaging front wheels, at least one surface-engaging rear wheel and a propulsion unit for driving either the front wheels or the rear wheel or wheels. Each front wheel being connected to the chassis by means of a front wheel support assembly, wherein the front wheel support assembly comprises a hydraulic cylinder associated with each front wheel. Each hydraulic cylinder comprises a housing connected to one of the chassis and the front wheel support assembly, and a piston connected to the other of the front wheel support assembly and the chassis.

Abstract: A valve assembly for a shock absorber includes a valve body defining a fluid passage. A valve disc engages the valve body to close the fluid passage. A fulcrum disc engages the valve disc at a first position and a second position radially outward from the first position. The fulcrum disc is designed such that the second position is closer to the valve body. In one embodiment, the fulcrum disc is concave with respect to the valve body.

Abstract: A shock-absorbing hydraulic system for cushioning a structural part of an all-terrain load-carrying vehicle, said hydraulic system having a first, hydraulic front cylinder and a first, hydraulic rear cylinder (1, 2) being connected in series and being arranged on one side of the longitudinal axis of the load-carrying vehicle, and a second, hydraulic front cylinder and a second hydraulic, rear cylinder (3, 4) being connected in series and being arranged on the other side of the longitudinal axis of the load-carrying vehicle, wherein each of the hydraulic cylinders exhibits a first end (5) and a second end (6) and is arranged between the structural part and the chassis of the load-carrying vehicle. According to the invention, the first end of the first, hydraulic front cylinder is connected to the second end of the second, hydraulic rear cylinder, and the second end of the first, hydraulic rear cylinder is connected to the first end of the second, hydraulic front cylinder.

Abstract: A vehicle suspension system of a motor vehicle includes a plurality of suspension devices mounted on the vehicle with respect to right and left wheels of the vehicle, respectively, a first behavior controller that controls the motion of each of the suspension devices when a vehicle body undergoes a first behavior, and a second behavior controller that controls the motion of each of the suspension devices when the vehicle body undergoes a second behavior, independently of the first behavior controller.

Abstract: A vehicle suspension system including a first and second hydraulic damper is provided. Each hydraulic damper is provided with a cylinder and a piston connected to one end of a hollow piston rod, such that the pistons freely slide in the cylinder. The system also includes a pressure regulator, which has a first and second oil chamber connected to the first and second hydraulic dampers, respectively. The system additionally comprises a sub-piston and another piston connected to the sub-piston, which slidably engage in the hollow piston rod, forming an oil chamber.

Abstract: A hydraulic system for damping the motion of rotation of a swivel joint between two vehicle parts of an articulated vehicle, of an articulated bus for example, comprising a hydraulic damping device as well as an electrically triggerable proportional pressure control valve, whereas the proportional pressure control valve is arranged between the force side and the suction side of the damping device, a mechanical pressure control valve (103) being provided in addition to the proportional pressure control valve (104) in the conduit between the suction side and the force side of the damping device, and whereas a multiple-way valve is provided for the alternative drive of the pressure control valve (103) or of the proportional pressure control valve (104).

Abstract: A hydraulic damper comprises a first chamber and second chamber separated by a wall. The wall contains at least one passage that extends generally between the first chamber and the second chamber. The passage is opened and closed by a valve member. The valve member is formed by a first sheet and a second sheet that generally form a fluid chamber. The fluid chamber is in direct communication with the first chamber through an aperture in the first sheet and in selective communication with the second chamber when the second sheet moves away from the first sheet. The first sheet also can move from the wall to allow fluid communication between the passage.

Abstract: A hydropneumatic suspension system, particularly for wheel support in motor vehicles, with at least one spring arrangement (1, 2) having at least one hydraulic spring strut (4), at least one hydropneumatic spring reservoir (6) and at least one damping valve (8). The spring strut (4) includes a cylinder (10) containing a hydraulic medium, and a piston (12), movably guided therein for spring compression and rebound. The piston (12) separates a cylinder space (16) from an annular space (18) surrounding a piston rod (14), wherein the cylinder space (16) is connected via a damping valve (8) with the spring reservoir (6) for producing an elastic force. The annular space (18) of the spring strut (4) is directly connected, while circumventing the damping valve (8), with the respective spring reservoir (6).

Abstract: A pneumatic cylinder, inside which a piston is displaced and which defines two chambers. The chambers are communicated through a first conduit passing through the piston and a second conduit at the ends of which there are variable flow valves. The first conduit has an adjustable valve. The load at any air chamber results in a working load which causes contact of the wheel with the ground for a longer period of time. An expansion spring is located at the lower air chamber. The piston is engaged with means for sensing its displacement. The invention could be applied to any kind of vehicle.

Abstract: A pair of combined accumulator and control devices for interconnected suspension units having a simplified construction and wherein unequal displacement of fluid from the associated suspension units will cause an increase in the effective damping of the suspension unit having the greatest fluid displacement.

Abstract: A left hydraulic pump connected to a left wheel and a right hydraulic pump connected to a right wheel of a vehicle are connected by a first oil passage and a second oil passage to constitute a closed circuit, and first and second variable throttle valves are provided between the first and second oil passages and the tank. Either one of the first and second variable throttle valves is throttled to cause the first and second hydraulic pumps to produce a braking force and a driving force, respectively, thereby controlling a yaw moment. At the same time, when either one of left and right wheel suspensions expands, the roll rigidity of the vehicle increases or decreases to vary the cornering forces of the wheels, thereby producing a yaw moment which assists in the yaw moment produced by the first and second hydraulic pumps.

Abstract: A vehicle suspension system (110) having a primary suspension system (112) and a secondary suspension system (114). Vertical motion of a vehicle wheel (120) places a force on the vehicle frame (126) which, in turn, places a force on the vehicle body (124). The secondary suspension system (114) translates the relative motion between the wheel (120) and frame (126) into a force on the vehicle body (124) which is equal and opposite to the force transmitted from the frame (126) to the body (124). A frictional shock absorber (300) is utilized in the suspension system (110) as well as a multi-stage coil spring (400).

Abstract: A damping mounting structure for use between two members for isolating motion changes which incorporates a plurality of dampers connected between the two members with spring members operating in parallel with the dampers to provide stiffness and where the springs are pneumatic to provide proper stiffness when the load is heavy without damage to the springs and/or to provide variable stiffness when desired.

Abstract: A synchronous balance device to maintain a car body balanced without inclination due to eccentric force during turning, and to offset eccentric forces during turning, and to offset eccentric forces to increase safety. Two sets of two hydraulic cylinders are mounted on left and right sides between the car body and axle. An oil feed port on one left hydraulic cylinder communicates with an oil discharge port on a right hydraulic cylinder, and an oil discharge port on the other left hydraulic cylinder communicates with an oil feed port on the other right hydraulic cylinder. When the car body is inclined with one side rising and the other side sinking piston rods of the hydraulic cylinders on the rising side pull down the car body to keep it balanced. Therefore, the present invention enables a car body to keep from becoming inclined during turning so as to increase driving safety.

Abstract: A suspension system for motor vehicles has each wheel assigned a spring and a hydraulic unit and arranged in series with the latter. The ground clearance of the vehicle body can thus be altered wheel-by-wheel. A hydraulic feed system enables hydraulic fluid to be displaced between hydraulic units and allows pitching and rolling movements of the vehicle body to be counteracted.

Abstract: Stabilizer device for motor vehicles including a torsion bar, an actuator having a piston and two cylinder chambers on both sides of piston, a first and a second fluid passages for connecting said two cylinder chambers, respectively, a solenoid changeover valve provided in first fluid passage. A actuator has two openings for communicating with each end of first fluid passage within an area on which piston may not slidably contact. A plate member and a centering spring are provided within each of cylinder chambers in such a manner that each of plate members is to come in contact with a bottom surface of cylinder slightly by virtue of resilience of centering spring when piston is positioned in a neutral position. An opening is provided in each of bottom surface of cylinder chambers within an area on which plate member is to come in contact therewith. Each of openings is communicated with second fluid passage and a check valve may be mounted in each of openings.

Abstract: A suspension for a vehicle including two hydraulic shock absorbers interconnecting respective remote zones of the suspended part of the vehicle to respective non-suspended parts. Each shock absorber is of the twin tube type with a compensation chamber which communicates with a lower chamber of the cylinder by way of a communication duct formed in a valve-containing endpiece. Inside the duct there are arranged a compression valve which allows the shock absorber fluid to flow towards the compensation chamber during contraction of the shock absorber and between the compression valve and the compensation chamber. A shut-off valve which is normally open is operated in the closing direction by a pilot pressure. The upper chamber of each shock absorber is connected by a respective hydraulic tube to a chamber controlling the shut-off valve of the other shock absorber. The shut off valve closes when the pressure exceeds a predetermined threshold.

Abstract: A mounting system for a vehicle engine including mounting units located at the opposite sides of the engine output shaft. The mounting unit includes a hydraulic chamber filled with hydraulic liquid. The hydraulic chamber of one unit is connected with that of the other unit through a conduit which may be provided with an orifice or a valve. The hydraulic chamber is provided with a resilient membrane which can deflect under the pressure in the hydraulic chamber.

Abstract: A hydraulically damped mounting device has two bushes connected together by an elongate bar. Each bush has a housing containing an anchor point connected to the housing by a resilient spring. Each spring, and part of the corresponding housing defines a working chamber for hydraulic fluid, the working chambers being interconnected by a passageway in the bar. The working chambers are positioned in the housing so that movement of the anchor points in opposing directions causes a decrease in size of one working chamber and an increase in size in the other. This change in size causes fluid movement through the passageway, and this exerts damping on the movement of the anchor points. Thus, when the device is connected between two objects with each anchor point connected to a corresponding one of the objects, relative vibration of the objects, and in particular torsional vibration may be damped.