Patent ID: 7240906

Claim:
A hydro-pneumatic suspension system having a right side hydro-pneumatic strut cross-coupled to a left side hydro-pneumatic strut such that an upper chamber of the right side strut is fluidly connected to a lower chamber of the left side strut and an upper chamber of the left side strut is fluidly connected to a lower chamber of the right side strut, the suspension system further comprising: a first accumulator fluidly connected with the upper chamber of the right side strut; a second accumulator selectively fluidly connected with the upper chamber of the right side strut by a spring-rate valve; a hydraulic supply selectively fluidly connected with the right side strut by a ride-height valve; and a suspension control system adapted to control the spring-raze valve, hydraulic pump and ride-height valve to set the suspension system in one of an on-road configuration and an off-road configuration, wherein the suspension control system opens the ride-height valve to fluidly connect the hydraulic supply to the right side strut to raise the overall height of the vehicle, and closes the ride-height valve upon reaching a selected vehicle height.