Land vehicles – Wheeled – Running gear
Patent
1992-12-23
1994-03-08
Focarino, Margaret A.
Land vehicles
Wheeled
Running gear
280673, B62D 1700
Patent
active
052921492
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND AND SUMMARY OF THE INVENTION
The invention relates to an arrangement for the active adjustment of a motor vehicle wheel having an adjusting element, suspension links linked to a wheel carrier, and an intermediate element for linking the adjusting element and the suspension links to the wheel carrier.
A wheel, suspension system disclosed in DE-PS 31 39 792 which shows an adjusting device for the camber change and the toe change under certain driving conditions. The adjustment takes place by way of hydraulic cylinders which are partially integrated into the link therebetween or which are formed as part of the wheel suspension link or as part of the link bearing. The adjustment elements are consequently subjected to relatively high forces which otherwise are absorbed only by the link bearings.
In Patent Document GB-A-2 203 711, an arrangement using a connecting link is shown for the control of the camber of the rear wheels for vehicles with four steerable rear wheels. This connecting link is pivotally fastened to the vehicle body and has a central swivel bearing for a suspension link supported and disposed on the wheel carrier. A hydraulic cylinder, which is constructed as an adjusting element and which causes the camber change of the wheel by way of the connecting link, is applied to the lower end of the connecting link facing away from the bearing of the body.
It is an object of the invention to provide a wheel suspension system for a motor vehicle which has a wheel adjusting device that requires little space, has a favorable response characteristic and is not subject to excessive forces.
According to the invention, this object is achieved by an arrangement for the active camber and/or toe adjustment of a motor vehicle wheel by a way of and adjusting device comprising an adjusting element in which suspension links are linked to a wheel carrier, are swivellably held on the vehicle body and the adjusting element, by way of a connecting intermediate element, is connected with the wheel carrier while acting upon it in an adjusting manner, wherein the intermediate element, by way of a central ball joint, is linked directly to the wheel carrier in a tiltable manner, and a control rod of the adjusting device is connected with a first bearing, and the suspension link is connected with a second bearing, the adjusting device comprising a hydraulic adjusting element which is connected with the control rod and being constructed to be capable of moving in and out while influencing the position of the wheel by way of an electronic control unit for forced wheel position changes as a function of driving parameters, such as suspension travel, lateral acceleration, the speed, the longitudinal acceleration, deceleration, yawings and steering angles and wherein the wheel is adjustable about a swivel axis formed below the wheel spin axis by a wheel-carrier-side tie rod joint and a wheel-carrier-side link joint.
According further to the present invention, the control rod can be held on the intermediate element which is linked to the wheel carrier and which holds on its upper free end the control rod in the swivel bearing with an axis in an articulated manner, and supports on its lower free end the suspension in the bearing with a swivel axis.
According further to the present invention, the control rod can be held on an intermediate element which is linked to the wheel carrier and which supports on an upper free end of the intermediate element the suspension link in the swivel bearing and holds on a lower free end of the intermediate element the control rod in the bearing in an articulated manner.
According further to present invention, between the adjusting element and the control rod, an intermediate lever is arranged which comprises two arms which are disposed at an angle with respect to one another. The intermediate lever with the arms which are disposed at different angles with respect to one another can be assigned to each wheel side of an axle between the control rod and the adjusting link.
According further to
REFERENCES:
patent: 4700972 (1987-10-01), Young
patent: 4717175 (1988-01-01), Arai et al.
patent: 5048860 (1991-09-01), Kanai et al.
PCT Examination Report dated Aug. 13, 1992.
Ellis Christopher P.
Focarino Margaret A.
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