Land vehicles – Wheeled – Running gear
Patent
1996-12-06
1997-12-23
Ellis, Christopher P.
Land vehicles
Wheeled
Running gear
280 961, 280675, B62D 1700
Patent
active
057000255
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a vehicle suspension system for a steerable wheel and, more particularly, to a vehicle suspension system for a steerable wheel which correctly changes the camber, the caster and toe according to the driving condition to which the vehicle is subjected to.
2. Description of Conventional Art
In general, a vehicle suspension system for a steerable wheel connects a shaft and a frame to each other, and absorbs vibrations and impacts from a road surface while the vehicle is running, thereby improving ride comfort and stability of the vehicle.
To absorb impacts from a road surface, a vehicle suspension system for a steerable wheel should be connected flexibly in a vertical direction, and to endure driving force, braking force and centrifugal force during the vehicle's turning operation applied to a wheel, a vehicle suspension system for a vehicle should be connected firmly in a horizontal direction.
A vehicle suspension system can be classified as an axle integral suspension system and an independent suspension system. While an axle integral suspension system is applied to a large vehicle, for example, buses, trucks and rear axles of passenger cars, an independent suspension system is applied mainly to an axle of a passenger car. To improve ride comfort and stability, an independent suspension system is bisected to act independently.
The present invention relates to an independent suspension system. As a vehicle suspension system for a steerable wheel, an independent suspension system of Macpherson type and that of Wishbone type are applied widely. The axle is thereby prevented from directly transmitting an impact or vibration from a road surface to the vehicle body, so that optimal handling stability and running stability can be obtained.
A vehicle suspension system for a steerable wheel is designed to maintain a proper position of a vehicle in a vehicle operation as well as absorb vibrations or impacts transmitted from a road surface to the vehicle body thereby ensuring running stability and handling stability.
In FIG. 9 of the drawings, a vehicle suspension system for a steerable wheel of prior art comprises a wheel carrier 100 rotatably supporting a wheel, an upper control arm 102 and a lower control arm 104 connecting the upper and lower portion of the wheel carrier 100 with a car body and a spring assembling body 108 having a shock absorber 106.
But, in this suspension system, elements (camber, caster and toe) of the wheel alignment are fixed as to predetermined values.
Accordingly, the wheel alignment is fixed in an optimal value for only one driving state, this suspension system cannot correspond to another driving state that the wheel receives different load and impact, so that it has a blind point with respect to ride comfort, stability and so on.
SUMMARY OF THE INVENTION
The objects of the present invention provides a vehicle suspension system for a steerable wheel which properly changes camber, caster and toe according to the driving condition of the vehicle, thereby improving ride quality and steerability to solve the above problems.
The objects of the present invention are fulfilled by providing a vehicle suspension system for a steerable wheel comprising: control arm and pushes or pulls the control arm to a wheel side thereby regulating a camber angle; the control arm and moves the control arm to the front and the rear of a vehicle thereby regulating a caster angle; regulating a toe; controlling the camber regulating means, the caster regulating means and the toe regulating means.
Further, the present invention provides the vehicle suspension system for the steerable wheel, wherein the camber regulating means includes: arm; fixed rods and is hinged on the car body; fixed rod in the direction of car width; and pressurized fluid supplied to the actuator.
Further, the present invention provides the vehicle suspension system for the steerable wheel, wherein the caster regulating means includes: arm; portion is ins
REFERENCES:
patent: 4973075 (1990-11-01), Rori et al.
patent: 5094472 (1992-03-01), Oyama et al.
patent: 5292149 (1994-03-01), Luger
patent: 5620199 (1997-04-01), Lee
Ellis Christopher P.
Hyundai Motor Company
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