Composite material spring for suspension device of vehicle, and method for controlling driving of vehicle using the same
AssigneesHyundai Motor Company, Kia Corporation
InventorsJingyo Suh, Ji Hoon Lee
Life of this patent
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Abstract
An embodiment composite material spring for a suspension device of a vehicle includes a leaf spring configured to be installed in a body of the vehicle and a wheel of the vehicle, a first fluid container installed at a left side of a center of the leaf spring and including a first magnetorheological fluid, and a second fluid container installed at a right side of the center of the leaf spring and including a second magnetorheological fluid.
Claims19
A composite material spring for a suspension device of a vehicle, the composite material spring comprising:
- a leaf spring configured to be installed at a body of the vehicle and a wheel of the vehicle;
- a first fluid container installed at a left side of a center of the leaf spring and including a first magnetorheological fluid;
- and
- a second fluid container installed at a right side of the center of the leaf spring and including a second magnetorheological fluid, wherein:
- the first fluid container includes first electromagnets configured to apply a first magnetic fluid to the first magnetorheological fluid to adjust a stiffness of the composite material spring;
- and
- the second fluid container includes second electromagnets configured to apply a second magnetic field to the second magnetorheological fluid to adjust the stiffness of the composite material spring.
A method for controlling driving of a vehicle using a composite material spring for a suspension device of the vehicle, the method comprising:
- determining a longitudinal inclination angle of the vehicle according to a rear load of the vehicle as being greater than or equal to a reference inclination angle;
- and
- controlling a stiffness of the composite material spring installed at a rear wheel of the vehicle to be larger than a stiffness of a composite material spring installed at a front wheel of the vehicle,
- wherein the composite material spring comprises:
- a leaf spring installed at each of a body of the vehicle and wheels of the vehicle, including the front wheel and the rear wheel of the vehicle;
- a first fluid container installed at a left side of a center of the leaf spring and including a first magnetorheological fluid having a stiffness adjusted according to an amount of output current of a controller;
- and
- a second fluid container installed at a right side of the center of the leaf spring and including a second magnetorheological fluid having a stiffness adjusted according to the amount of output current of the controller.
A method for controlling driving of a vehicle using a composite material spring for a suspension device of the vehicle that includes a composite material spring at each of a body of the vehicle and wheels of the vehicle, wherein each of the composite material springs comprises a leaf spring, a first fluid container installed at a left side of the leaf spring and including a first magnetorheological fluid having a stiffness adjusted according to an amount of output current of a controller, and a second fluid container installed at a right side of the leaf spring and including a second magnetorheological fluid having a stiffness adjusted according to the amount of output current of the controller, the method comprising:
- determining whether a longitudinal inclination angle of the vehicle according to a rear load of the vehicle is greater than, equal to, or less than a reference inclination angle;
- and
- controlling a stiffness of the composite material spring installed at one of the wheels of the vehicle based on whether the longitudinal inclination angle of the vehicle according to the rear load of the vehicle is greater than, equal to, or less than the reference inclination angle;
- wherein controlling the stiffness of the composite material spring comprises controlling the stiffness of the composite material spring installed at the rear wheel of the vehicle to be larger than the stiffness of the composite material spring installed at the front wheel of the vehicle when the longitudinal inclination angle of the vehicle is greater than or equal to the reference inclination angle;
- and
- wherein controlling the stiffness of the composite material spring comprises controlling the stiffness of the composite material springs installed at each of the wheels of the vehicle with a first reference value when the longitudinal inclination angle of the vehicle is less than the reference inclination angle.
Dependencies are inferred from the claim text.