Roll control actuator with rotary mechanism

Details Roll control actuator with rotary mechanism Roll control actuator with rotary mechanism

2008-04-22

2008-04-22

Culbreth, Eric (Department: 3616)

Land vehicles

Suspension modification enacted during travel

Lateral vehicle disposition

Reexamination Certificate

active

07360771

ABSTRACT:
A roll control actuator for a stabilizer bar includes an outer housing that is fixed to a first bar portion and a paddle member that is fixed to a second bar portion. The roll control actuator includes multiple fluid chambers with different fluid volumes. A control is used to selectively adjust roll stiffness of the stabilizer bar and includes a control valve in fluid communication with an accumulator. The first and second stabilizer bars can rotate relative to each other when the control valve is open to decrease roll stiffness and provide good ride quality. When the control valve is open, fluid flows freely between the fluid chambers. The first and second bar portions are hydraulically locked together when the control valve is closed to increase roll stiffness during cornering maneuvers. When the control valve is closed, the accumulator is isolated from the roll control actuator and fluid flow through the fluid chambers cannot occur due to differing fluid volumes.

REFERENCES:
patent: 3197233 (1965-07-01), Bauer et al.
patent: 4919444 (1990-04-01), Leiber et al.
patent: 5020826 (1991-06-01), Stecklein et al.
patent: 5632502 (1997-05-01), Oppitz et al.
patent: 5791444 (1998-08-01), Schiffler
patent: 6520510 (2003-02-01), Germain et al.
patent: 6951341 (2005-10-01), Beetz et al.
patent: 2004/0217569 (2004-11-01), Gradu et al.

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