A vehicle fluid suspension circuit comprising fluid sources provided to the front and rear sides of a vehicle, front and rear side paths connecting the front and rear side fluid sources and fluid suspensions of right and left wheels of the respective sides and providing valves between the resepective fluid sources and fluid suspensions of respective wheels and a front-to-rear path having an effective sectional area which is smaller than the effective sectional areas of the front side path and rear side path, respectively, and connecting the front side fluid source with the rear side fluid source.
An apparatus and method for supporting a dynamic load relative to a foundation, such as a vehicle relative to the road, by a hydraulic system that monitors the movement of the load and adds or removes hydraulic fluid from the system to compensate for the load change. The hydraulic system is preferably one or more hydraulic cylinders that have a first chamber operably connected to the load and a second chamber operably connected to the foundation. The first and second chamber are connected by a valve. The valve is connected to the second chamber and a source of pressurized fluid with a reservoir. The first chamber senses the load change and the valve adds fluid from the pressurized fluid source to the second chamber or removes fluid from the second chamber to the reservoir to compensate for the change in the load and maintain the load in substantially the same position relative to the foundation.
