Vibration damping device for use in automotive suspension system and suspension system using the same

• US 20040201196A1
• Filed: 03/05/2004
• Published: 10/14/2004
• Est. Priority Date: 03/10/2003
• Status: Active Grant

• Current Assignee: Advics Company Limited (Aisin Corp.), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Rubber Industries Limited, Tokai Rubber Industries Limited
• Original Assignee: Advics Company Limited (Aisin Corp.), Sumitomo Electric Industries Limited (Sumitomo Corporation), Sumitomo Rubber Industries Limited, Tokai Rubber Industries Limited
• Inventors: Nakajima, Shiro, Kubota, Yasuhiro, Katagiri, Akira
• Granted Patent: US 7,178,818 B2
• Time in Patent Office: Days
• US Class Current: 280/124.134
• CPC Class Codes: B60G 2200/1424 the lateral arm having an L-shape
• CPC Class Codes: B60G 2204/1431 of an L-shaped arm
• CPC Class Codes: B60G 2204/4104 Bushings having modified rigidity in particular directions
• CPC Class Codes: B60G 7/02 Attaching arms to sprung part of vehicle B60G7/006 takes precedence

Abstract

A vibration damping device for use in a automotive suspension system, adapted to be disposed at a linking portion between a body of the vehicle and a suspension member that connects and supports a wheel on the body is disclosed. The vibration damping device comprises a load sensing unit adapted to sense a signal corresponding to a load exerted between the body and the suspension member. A suspension system equipped with the same is also disclosed.

Claims

1. A vibration damping device for use in a suspension system of an automotive vehicle, adapted to be disposed at a linking portion between a body of the vehicle and a suspension member that connects and supports a wheel on the body, the vibration damping device comprising a load sensing unit adapted to sense a signal corresponding to a load exerted between the body and the suspension member.

2. A vibration damping device according to claim 1, wherein the load sensing unit is capable of sensing external force exerted on the wheel in each of three directions, i.e., a lengthwise direction, a lateral direction, and a vertical direction of the vehicle, on a basis of a signal corresponding to a load exerted across the body and the wheel.

3. A vibration damping device according to claim 1, wherein the vibration damping device comprises a rubber busing including a first mounting member fixable to the body of the vehicle, a second mounting member fixable to the suspension member, and an rubber elastic body elastically connecting the first and second mounting members, and wherein the load sensing unit comprises a distance sensor adapted to sense an amount of relative displacement between the first mounting member and the second mounting member.

4. A vibration damping device according to claim 3, wherein the distance sensor is capable of sensing the amount of relative displacement of the first mounting member and the second mounting member in a lengthwise direction, lateral direction and vertical direction of the vehicle.

5. A vibration damping device according to claim 3, wherein the distance sensor includes a target installed at a fixed location at one of the first and second mounting members, and a sensor body installed at a fixed location at an other one of the first and second mounting members so as to be opposed to the target in a direction in which the first and second mounting members undergo relative displacement.

6. A vibration damping device according to claim 1, wherein the vibration damping device comprises a rubber busing including a first mounting member fixable to the body of the vehicle, a second mounting member fixable to the suspension member, and an rubber elastic body elastically connecting the first and second mounting members, and wherein the load sensing unit comprises a strain sensor adapted to sense an amount of relative displacement between the first mounting member and the second mounting member.

7. A vibration damping device according to claim 6, further comprising:

a deformation plate installed straddling a gap between the first mounting member and the second mounting member; and

a strain sensor attached to the deforming plate.

8. A vibration damping device according to claim 1, further comprising a processing unit for deriving external force exerted on the wheel in three directions, i.e., the lengthwise direction, lateral direction, and vertical direction of the vehicle, by processing the signal obtained by means of the load sensing unit in mathematical operations on the basis of output characteristics of the load sensing unit obtained in advance.

9. A suspension system for an automotive vehicle comprising:

a suspension member for connecting and supporting a wheel on a body of the vehicle; and

a vibration damping device adapted to be disposed at a linking portion between the body and the suspension member,

wherein the vibration damping device comprises a load sensing unit adapted to sense a signal corresponding to a load exerted between the body and the suspension member.

10. A suspension system according to claim 9, further comprising another vibration damping device adapted to be disposed at another linking portion between the body of the vehicle and the suspension member.

11. A suspension system according to claim 9, wherein the suspension member comprises an independent suspension type suspension arm.