Vehicle suspension system

A vehicle suspension system for a vehicle body supported by a plurality of wheels arranged in lateral and longitudinal spaced relation to the vehicle body, including individual fluid ram means arranged between each wheel and the vehicle body, each fluid ram means including a double acting ram having an upper and lower chamber, conduit means individually communicating the upper chamber of the respective rams with the lower chamber of the respective diagonally opposite ram to provide fluid circuits therebetween, a load distribution means operably interposed between the fluid circuits and adapted to at least substantially equalize the pressure in said fluid circuits and thereby maintain substantially consistent loading on all the wheels during non-dynamic wheel movement independent of the vertical disposition of the wheel, the load distribution means having a body supporting at least one displaceable member, the displacement of said displaceable member being a function of the average height of each pair of diagonally opposite wheels, sensor means adapted to generate a signal indicative of the positional relation of each of the wheels relative to the vehicle body, control means arranged to receive said signals and determine the average height of the vehicle body relative to selected pairs of orthogonally adjacent wheels at a selected location between the respective pair of orthogonally adjacent wheels, and adjustment means operable in response to variation of said determined average heights from a respective preset datum height for each said pair of wheels to adjust the quantity of fluid in said circuits communicating with the rams of said orthogonally adjacent wheels to establish said preset datum height between the orthogonally adjacent wheels and the vehicle body at said selected locations, wherein a further sensor means is provided for generating a signal indicative of the positional relation of the at least one displaceable member relative to the body of the load distribution means, the control means being adapted to receive the signal from the further sensor means and to determine and compare the average height of each pair of diagonally opposite wheels with the position of the displaceable member, the adjustment means adjusting the quantity of fluid in the fluid circuits to return the position of the displaceable member to an optimum position to facilitate the operation of the load distribution means.