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US 6,575,484 B2Granted
Dual mode regenerative suspension for an off-road vehicle
AssigneeHUSCO International, Inc.
InventorsJeffrey A. Rogala, Eric N. Griesbach
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AssigneeHUSCO International, Inc.
InventorsJeffrey A. Rogala, Eric N. Griesbach
Estimating the term…
A vehicle suspension has one or more hydraulic cylinders connecting an axle to a frame of the vehicle and each cylinder has a first and second chambers. The suspension operates in either a regeneration mode, in which a fluid path is provided between the first and second chambers, and a double acting mode, in which the first and second chambers are isolated from each other and fluid flows between each chamber and a separate accumulator. The selection between the regeneration and double acting modes is made in response to the pressure level in the cylinder as determined by a pressure sensor of a closed loop control system or by the pressure versus current characteristics of a electrically operated valve in the suspension for a loop control system. The hydraulic system also is able to raise and lower the suspension as necessary due to changes in the load carried by the vehicle.
A hydraulic circuit for controlling a suspension of a vehicle having a cylinder with a piston that defines a first chamber and a second chamber within the cylinder, said hydraulic circuit comprising:
A method for controlling a suspension of a vehicle having a cylinder with a piston that defines a first chamber and a second chamber within the cylinder, the vehicle including a valve assembly which couples the cylinder to both a pump and a tank, said method comprising:
Dependencies are inferred from the claim text.