B - Operations – Transporting – 60 – G
Patent
B - Operations, Transporting
60
G
B60G 11/26 (2006.01) B60G 5/00 (2006.01) B60G 15/08 (2006.01) B60G 17/052 (2006.01) B60G 21/067 (2006.01)
Patent
CA 2295285
A pneumatic suspension system for a vehicle providing minimum pneumatic spring stiffness to minimize frame beaming in the vehicle' frame. In one embodiment of the invention, the pneumatic suspension system has a first pneumatic spring connected to a first axle and to the frame. A second pneumatic spring is connected to the second axle and to the frame. The first and second pneumatic springs contain pneumatic fluid. A conduit containing pneumatic fluid is in fluid communication with the first and second pneumatic springs. The conduit allows the fluid to move between the first and second pneumatic springs. The pneumatic fluid in the conduit has a fluid resonant frequency. The first and second pneumatic springs and the conduit define a system having a variable stiffness dependent upon an input vibration frequency. The input vibration frequency is a predetermined fraction of the fluid resonant frequency. The pneumatic conduit is sized so the predetermined fraction of the fluid resonant frequency corresponds to the frame beaming frequency, thereby providing minimum stiffness of the system at the frame beaming frequency.
Oyen Wiggs Green & Mutala Llp
Paccar Inc.
LandOfFree
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