Suspension device
The suspension device addresses responsiveness issues in vehicles by using specific angles and bushing ratios to offset toe changes, enhancing cornering responsiveness and controllability.
JP7727498B2Active Publication Date: 2025-08-21SUBARU CORP
Patent Information
- Application Number
- JP2021187146
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-11-17
- Publication Date
- 2025-08-21
- Estimated Expiration
- 2041-11-17
AI Technical Summary
Technical Problem
Existing suspension systems in vehicles experience a time delay in responsiveness during the initial stage of cornering due to toe changes caused by vertical force steer and roll steer, affecting vehicle controllability.
Method used
A suspension device with specific inclination angles and bushing rigidity ratios that generate resistance to toe-out changes through compliance steer and shock absorber damping, improving responsiveness by offsetting toe changes during the initial stage of cornering.
Benefits of technology
The suspension device enhances vehicle responsiveness and controllability by reducing time delays in steering response and correcting toe changes, ensuring accurate and easy driving.
✦ Generated by Eureka AI based on patent content.
Smart Images
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Abstract
To provide a suspension device which achieves improvement of responsiveness at an initial stage of turning.SOLUTION: A suspension device 1 comprises: a housing 20 which rotatably supports a rear wheel RW of a vehicle; a radius arm 30 protruding from the housing toward the front of the vehicle; a radius arm bush 31 coupling the radius arm to a vehicle body through an elastic body; and a shock absorber 70 which generates a damping force in response to vertical motion of the housing with respect to the vehicle body. Inclination angles θ1 and θ2 are set to satisfy ΔF*tanθ2>M*tanθ1 when θ1 is an inclination angle at which a straight line connecting a center of the radius arm bush to a center C of the rear wheel inclines in a direction such that the rear wheel side is lowered relative to a horizontal line, θ2 is an inclination angle at which an axis of expansion and contraction of the shock absorber inclines forward, M is an unspring mass of the suspension device, and ΔF is an amount of increase in a ground load of the rear wheel from the steady state during a shrinkwise stroke of the shock absorber.SELECTED DRAWING: Figure 2
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Citation Information
Patent Citations
Suspension device for vehicle
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Rear suspension
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Toe control mechanism for suspension
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Vehicular rear suspension device
JP2005225382A
Multilink rear axle for a motor vehicle
US20140353937A1