Automotive rear suspension system
First Claim
1. A multi-link rear suspension system in which a support member for a rear wheel of a vehicle is connected to a vehicle body through five links, at least ends of the links toward the vehicle body are provided with resilient bushes, respectively, and a lower end of a damping device constituted by a coil spring and a damper is pivoted to a portion of the support member for the rear wheel located toward the inside of the vehicle body,wherein the damping device is disposed with respect to a suppositive king pin axle for the rear wheel so that a vertical reaction force thereof produces a moment toward toe-in about the suppositive king pin axle, and the damping device is spaced apart from the rear wheel toward the inside of the vehicle body so that the vertical reaction force thereof produces a moment toward negative camber on the rear wheel, and wherein the moment toward negative camber produced by the vertical reaction force of the damping device is set to be always larger than any moment toward positive camber produced by a side force on the rear wheel during vehicle cornering until limit maneuvering conditions due to the side force for the rear wheel during cornering are reached.
1 Assignment
0 Petitions
Accused Products
Abstract
In a multi-link rear suspension (A) in which a wheel support (11) is connected to a vehicle body through five links (6-10) and vehicle body side ends of the links are provided with rubber bushes (26), respectively, the lower end of a damping device (14) formed by coaxially arranging a coil spring (12) and a damper (13) is pivoted to a portion of the wheel support (11) located toward the inside of the vehicle body so that the vertical reaction force of the damping device (14) produces a moment Mn toward negative camber on a rear wheel (2). The moment Mn is set to be always larger than a moment Mp toward positive camber produced by a side force on the outside rear wheel (2) during vehicle cornering until limit maneuvering conditions of the outside rear wheel due to the side force are reached. The damping device (14) is disposed with respect to a suppositive king pin axle K so that the vertical reaction force thereof produces a moment toward toe-in on the rear wheel (2). In this manner, the multi-link suspension provides a sharp driving feeling applicable even for a sports car while maintaining a good ride through the involvement of the rubber bushes (26).
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Citations
19 Claims
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1. A multi-link rear suspension system in which a support member for a rear wheel of a vehicle is connected to a vehicle body through five links, at least ends of the links toward the vehicle body are provided with resilient bushes, respectively, and a lower end of a damping device constituted by a coil spring and a damper is pivoted to a portion of the support member for the rear wheel located toward the inside of the vehicle body,
wherein the damping device is disposed with respect to a suppositive king pin axle for the rear wheel so that a vertical reaction force thereof produces a moment toward toe-in about the suppositive king pin axle, and the damping device is spaced apart from the rear wheel toward the inside of the vehicle body so that the vertical reaction force thereof produces a moment toward negative camber on the rear wheel, and wherein the moment toward negative camber produced by the vertical reaction force of the damping device is set to be always larger than any moment toward positive camber produced by a side force on the rear wheel during vehicle cornering until limit maneuvering conditions due to the side force for the rear wheel during cornering are reached.
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19. A multi-link rear suspension system in which a support member for a rear wheel of a vehicle is connected to a vehicle body through five links, at least ends of the links toward the vehicle body are provided with resilient bushes, respectively, and a lower end of a damping device constituted by a coil spring and a damper is pivoted to a portion of the support member for the rear wheel located toward the inside of the vehicle body,
wherein a suppositive king pin axle for the rear wheel is inclined rearward so that an upper portion thereof is located closer to the rear of the vehicle body and is set to provide a negative caster, wherein an axis of the damping device is located inwardly from the suppositive king pin axle in non-parallel and non-intersecting relation to the suppositive king pin axle, is also located at a position closer to the rear of the vehicle body than the center of the rear wheel when viewed from the side of the vehicle body, and is set to extend substantially in a vertical direction, and wherein the damping device is spaced a predetermined distance or more apart from the rear wheel toward the inside of the vehicle body so that a moment toward negative camber acting on the rear wheel by a vertical reaction force of the damping device is always larger than any moment toward positive camber produced by a side force on the rear wheel during cornering of the vehicle until limit maneuvering conditions due to the side force for the rear wheel during cornering are reached.
Specification