Vehicle roll control
AssigneeLand Rover
InventorWilliam Burdock
Life of this patent
Estimating the term…
Abstract
A vehicle roll control system uses two accelerometers (38, 40) on the vehicle to detect body roll and then filters out higher frequency roll movements as indicative of a rough road surface. The system also monitors vehicle speed, and increases roll stiffness in response to measured increase in vehicle speed, but decreases roll stiffness in response to detected rough road surfaces.
Claims10
Apparatus for detecting the roughness of a surface over which a vehicle is travelling, the apparatus comprising roll detection means for measuring roll movements of the vehicle, filtering means for detecting high frequency roll movements, characterized by control means arranged to measure said roughness by measuring the level of said high frequency roll movements.
A vehicle suspension system comprising apparatus according to any foregoing claim for detecting surface roughness wherein the roll control means is arranged to control the roll stiffness of the vehicle, and is arranged to reduce the roll stiffness of the vehicle in response to the detection of increased surface roughness.
A vehicle suspension system comprising roll control means for controlling the roll stiffness of the vehicle, roughness measuring means for measuring the roughness of the surface over which the vehicle is travelling, vehicle speed measuring means for measuring the speed of the vehicle characterized in that the roll control means is arranged to increase the roll stiffness if the vehicle speed increases but to decrease the roll stiffness of the roughness of the surface over which the vehicle is travelling increases.
Vehicle suspension apparatus substantially as hereinbefore described with reference to the accompanying drawings.
Dependencies are inferred from the claim text.