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Technical Paper

Torsion Beam Rear Suspension With Toe-Controlled Compliant Hubs

2000-03-06
2000-01-0094
The torsion beam type of rear suspension has been adopted by most manufacturers of small to medium front wheel drive passenger cars. This is primarily for reasons of cost, packaging and functionality. However, with a torsion beam, there is a compromise between handling performance and ride refinement. A typical torsion beam set to give optimum handling has insufficient longitudinal wheel compliance to give good ride and NVH performance, and when set to give optimum ride and NVH performance suffers from significant levels of lateral compliance oversteer. Some of the compromises inherent in a simple torsion beam rear suspension may be ameliorated by the addition of extra links into the system; such solutions include the addition of a panhard rod or of toe-control links. However, such solutions incur additional cost, and the additional space used may be unacceptable from a packaging viewpoint.
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