Suspension system for vehicle

Details Suspension system for vehicle Suspension system for vehicle

2011-05-10

2011-05-10

To, Toan C (Department: 3616)

Land vehicles

Suspension modification enacted during travel

Lateral vehicle disposition

C280S005500, C280S005509, C280S005511, C280S005512, C280S005515, C280S124108

Reexamination Certificate

active

07938410

ABSTRACT:
In a suspension system for a vehicle, a suspension spring, an absorber for controllably changing the damping coefficient becoming the reference of amount of its own generating damping force, a displacement force generator for controllably generating a displacement force are arranged in parallel between sprung and unsprung members. A vibration damping control is executed based on a so-called skyhook damper theory by utilizing the displacement force. In execution of the vibration damping control, when a sign of sprung-member absolute velocity Vu and a sign of sprung/unsprung-members velocity difference ΔV are the same to each other, a damping-coefficient increasing control is executed to set a target damping coefficient C* of the absorber to a coefficient value C2that is larger than a coefficient value C1to which the target damping coefficient C* is set when the sign of sprung-member absolute velocity Vu and the sign of sprung/unsprung-members velocity difference ΔV are different from each other. Vibration of the sprung member can be effectively damped by cooperation of the absorber and the displacement force generator.

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