A hydraulic suspension system is provided for a vehicle, the system including at least a first hydraulic cylinder and a second hydraulic cylinder, each of the hydraulic cylinders including a first chamber and a second chamber, at least four hydraulic accumulators, and at least a first and a second fluid communication path. The first chamber of the first hydraulic cylinder, and the second chamber of the second hydraulic cylinder are in fluid communication with each other by means of the first fluid communication path, and the first chamber of the second hydraulic cylinder and the second chamber of the first hydraulic cylinder are in fluid communication with each other by means of the second fluid communication path, wherein a first hydraulic accumulator is in fluid communication with the first fluid communication path by means of a first accumulator fluid communication path and a second hydraulic accumulator is in fluid communication with the first fluid communication path by means of a second accumulator fluid communication path, wherein a connection point between the first accumulator fluid communication path and the first fluid communication path is distanced from a connection point between the second accumulator fluid communication path and the first fluid communication path, and wherein a third hydraulic accumulator is in fluid communication with the second fluid communication path by means of a third accumulator fluid communication path and a fourth hydraulic accumulator is in fluid communication with the second fluid communication path by means of a fourth accumulator fluid communication path, wherein a connection point between the third accumulator fluid communication path and the second fluid communication path is distanced from a connection point between the fourth accumulator fluid communication path and the second fluid communication path.

In one aspect, a suspension control system is provided for dynamically adjusting pistons located proximal to wheels of an agricultural machine to substantially equalize distribution of weight of the machine at each wheel and/or provide a substantially constant desired orientation of the machine above a ground surface thereby protecting laterally extending sprayer booms from contacting the ground. Articulation, pitch, roll and/or machine height can be determined from piston measurements on the machine to apply such height corrections. For sprayers, this allows controlling clearance and suspension height to maintain the boom parallel to the ground to prevent damage.

Technology is provided for a pneumatic anti-roll system for use on a vehicle suspension. The pneumatic anti-roll system includes left and right side air springs connectable between a chassis of the vehicle and an axle of the vehicle suspension. Left and right side height control valves are mounted to the chassis and left and right side linkages connect between the left and right side height control valves and corresponding left and right end portions of the axle. Left and right side control air lines connect between the left and right side height control valves and corresponding left and right side air springs, respectively.

Technology is provided for a pneumatic anti-roll system for use on a vehicle suspension. The pneumatic anti-roll system includes left and right side air springs connectable between a chassis of the vehicle and an axle of the vehicle suspension. Left and right side height control valves are mounted to the chassis and left and right side linkages connect between the left and right side height control valves and corresponding left and right end portions of the axle. Left and right side control air lines connect between the left and right side height control valves and corresponding left and right side air springs, respectively.

A semi-trailer for transporting a load to be moved has a wheeled front module having a right-hand front row and a left-hand front row of front bogies each provided with a respective hydraulic suspension driven by its own hydraulic cylinder; a wheeled rear module comprising a right-hand rear row and a left-hand rear row of rear bogies each provided with a respective hydraulic suspension driven by its own hydraulic cylinder; a coupling unit of the wheeled front module for the coupling to a tractor and comprising a pair of hydraulic jacks for transferring a part of the load to be moved to the tractor; a first hydraulic unit interposed between the hydraulic cylinders of the front and rear rows of bogies and configured in such a way that the sum of the instantaneous load-supporting pressures acting on the hydraulic cylinders of the right front row and of the cylinders of the left-hand rear row is equal to the sum of the instantaneous pressures controlling the cylinders of the left-hand front row and of the cylinders of the right rear row; and a second hydraulic unit configured to control the hydraulic jacks based on the sum of the instantaneous load-supporting pressures acting on the hydraulic cylinders of said right front row and of said left-hand front row.

Tandem axle assemblies and associated systems and components are provided for use on heavy duty trucks, trailers, and/or other vehicles. Tandem axle assemblies may include a drive axle and a non-drive lift axle mounted to a non-torque reactive suspension system having hanger brackets positioned between the tandem axles. Roll stability components of the suspension system can be located on the drive axle side of the suspension, reducing weight, cost, and complexity of the tandem axle assembly. The non-drive lift axle can be operated by a control system during vehicle dynamic operation to improve traction performance of the vehicle.

Tandem axle assemblies and associated systems and components are provided for use on heavy duty trucks, trailers, and/or other vehicles. Tandem axle assemblies may include a drive axle and a non-drive lift axle mounted to a non-torque reactive suspension system having hanger brackets positioned between the tandem axles. Roll stability components of the suspension system can be located on the drive axle side of the suspension, reducing weight, cost, and complexity of the tandem axle assembly. The non-drive lift axle can be operated by a control system during vehicle dynamic operation to improve traction performance of the vehicle.

The present invention relates to an improved suspension (20), in particular for traditional two-wheel motorcycles and/or for motorcycles or vehicles with three or more wheels with at least two tilting wheels. The improved suspension (20) according to the present invention is capable of providing adequately progressive performance without simultaneous problems of excessive gradual engagement, which affect the currently known suspensions comprising gas shock absorbers. Such a result is possible by using an accumulator (70) having a variable volume operatively connected to the first accumulator (60) which is part of the traditional suspension.

The present invention relates to an improved suspension (20), in particular for traditional two-wheel motorcycles and/or for motorcycles or vehicles with three or more wheels with at least two tilting wheels. The improved suspension (20) according to the present invention is capable of providing adequately progressive performance without simultaneous problems of excessive gradual engagement, which affect the currently known suspensions comprising gas shock absorbers. Such a result is possible by using an accumulator (70) having a variable volume operatively connected to the first accumulator (60) which is part of the traditional suspension.

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.