One method to achieve "lateral force understeer" characteristic in torsion beam suspension system is to use special bushes; such as complex bushes. dose any one know any thing about this method and this bushes?
VW used these bushes in the Passat and later Golf.
Under lateral forces the curve outer side of the axle is moving to the front of the car, the inner side backwards. This reduces the oversteering behaviour.
You can "reduce" the compiance oversteer effect by orienting the bushing axis such that the inner face of the bushing looks forward. The orientation may need to be optimized as too much orientation will affect longtitudinal compliance and braking toe.