2012年9月17日星期一

The suspension of the torsion beam suspension

In the small car on the rear suspension used very generally torsion beam, are usually classified into the categories of " semi-independent ". Strictly speaking, from the engineering point of view, the torsion beam suspension guiding mechanism is a one-piece wheels share "H " or "C" shape component, form with the rigid axle type suspension similar to. But it moves, the left and the right sides of the trailing arm, because of torsion beam itself somewhat elastic, and the left and right wheel movements have certain independence. Because the wheel guide mechanism is trailing arm type, so kingpin inclination change rule and the same as independent suspension trailing arm. Therefore, the so-called " semi-independent torsion beam ", is derived from the elastic torsion beam itself, once the torsion beam structure is reinforced, which means these Xu elastic no existing space, if not a slight deformation of the torsion beam, also should be called non independent suspension.
Torsion beam property
In the CTCC field, hippocampal Z1 fleet of cars may not be the maximum horsepower, but the bend on the strength of the other team in awe, this is because the 1600CC groups of the racing team, in addition to the hippocampal outside, other racing are the use of torsion beam rear suspension, therefore in the corners are lost to the " class of McPherson " hippocampal racing. Torsion beam takes up less space required for the chassis, " the body of a small space for " compact car, compact structure with immense attraction. But its driving performance on a poor job, due to its operation ways of approaching non independent suspension, and thus whether the filter shock or manipulative, far inferior to traditional independent suspension. In addition, in turn, torsion beam because of left and right side of the differential, and allows the rear wheel and the front wheel steering performance, " rivalry ". And because the torsion beam is integral, wheel kingpin inclination, caster ( adjustable torsion beam height can be changed) and beam angle and other parameters, not through conventional means to actively change, manipulative, plasticity is also quite limited. In common parlance, a torsion beam existence value, namely " province ".
The trend of the torsion beam
In the 2011 Shanghai international auto show, the German famous auto parts manufacturers presents the new design of the torsion beam rear suspension assembly. General torsion beam rear suspension, rear brake axle, wheel bearing are all integrated in the arm of the torsion beam. While ZF expresses new technology, is the torsion beam and rear Hub independent, that is to say, the rear wheel Hub is the 1.5 movable member, is fixed on the torsion beam. You can change the Hub fixed point, to modify the rear wheel static positioning of numerical. For improving the torsion beam driving performance, especially the curve performance, can adjust the toe-in, kingpin inclination and other parameters to improve. However, the low cost of traditional torsion beam suspension, new technology and production cost, will be an influence whether the key factors of car factory.
A torsion beam type map.
The standard of the torsion beam rear wheel bearing, intermediate beam with transverse force support, can be said that both the subframe role for a rigid, generally is not high in small cars, can shoot two hawks with one arrow.
This is a variable geometry of the torsion beam. You can see the rear Hub ontology is half floating state mounted on the arms above, can slightly adjust the wheel positioning parameters.

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