Adaptive suspension system
AssigneeRee Automotive Ltd
InventorsIvan Jefferies, Damian Andrew Harty
Life of this patent
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Abstract
A suspension system for a wheel assembly of a vehicle includes a telescopic damper configured to mediate between respective sprung and unsprung portions of the wheel assembly, a rebound spring arranged to moderate wheel travel, and a force-transfer system operative to apply a force to change one or more parameters of the suspension system. The application of the force by the force-transfer system is effective in a first operating mode to change a length of the telescopic damper and in a second operating mode to regulate a wheel rate of the wheel assembly. The force-transfer system is controllable to modify a wheel-travel value at which the wheel rate of the wheel assembly changes in the second mode of suspension operation.
Claims20
A suspension system for a wheel assembly of a vehicle, the suspension system comprising:
- a. a telescopic damper configured to mediate between an unsprung portion and a sprung portion of the wheel assembly, the telescopic damper comprising a rebound striker and a piston rod assembly including a rebound stop;
- and
- b. an internal rebound cylinder disposed within the telescopic damper, the internal rebound cylinder encompassing the rebound stop, an active chamber of the internal rebound cylinder being arranged in fluid communication with a hydraulic system controllable to regulate a pressure in the active chamber so as to change a position of the internal rebound cylinder relative to the rebound striker,
- wherein the suspension system is effective, in a first operating mode, to regulate a wheel rate of the wheel assembly, and the hydraulic system is controllable to change a wheel-travel value at which the wheel rate of the wheel assembly changes in the first mode of vehicle operation.
A suspension system for a wheel assembly of a vehicle, the suspension system comprising:
- a. a telescopic damper configured to mediate between an unsprung portion and a sprung portion of the wheel assembly, the telescopic damper comprising a rebound striker and a piston rod assembly including a rebound stop;
- and
- b. an internal rebound cylinder disposed within the telescopic damper, the internal rebound cylinder encompassing the rebound stop, an active chamber of the internal rebound cylinder being arranged in fluid communication with a hydraulic system controllable to regulate a pressure in the active chamber so as to change a position of the internal rebound cylinder relative to the rebound striker,
- wherein the suspension system is effective, in a first operating mode, to regulate a wheel rate of the wheel assembly and the suspension system is effective, in a second operating mode, to kneel the vehicle at the wheel assembly.
A suspension system for a wheel assembly of a vehicle, the suspension system comprising:
- a. a telescopic damper configured to mediate between an unsprung portion and a sprung portion of the wheel assembly, the telescopic damper comprising a rebound striker and a piston rod assembly including a rebound stop;
- and
- b. an internal rebound cylinder disposed within the telescopic damper, the internal rebound cylinder encompassing the rebound stop, an active chamber of the internal rebound cylinder being arranged in fluid communication with a hydraulic system controllable to regulate a pressure in the active chamber so as to change a position of the internal rebound cylinder relative to the rebound striker,
- wherein the suspension system is effective, in a first operating mode, to regulate a wheel rate of the wheel assembly, and the hydraulic system includes an external rebound cylinder, a rebound-cylinder piston, and a rebound spring arranged to be compressible by the rebound-cylinder piston.
A vehicle platform comprising a plurality of wheel assemblies according to 16, wherein the respective hydraulic system of each wheel assembly of the plurality of wheel assemblies is individually controllable to change a respective wheel-travel value at which a wheel rate of the wheel assembly changes in the first mode of vehicle operation.
Dependencies are inferred from the claim text.