Suspension form of talk torsion beam suspension briefly

On the use of very common torsion beam suspension in the small car, usually classified into "semi-independent" category. Strictly speaking, from the perspective of automotive engineering, the torsion beam suspension of the guide mechanism is about one-piece wheel share the "H" shaped or "C"-shaped member, form hard shaft suspension similar. Except that it moves the left and right sides of the trailing arm, because the elasticity of the torsion beam itself slightly, leaving the left and right wheel operation has a certain degree of independent. As the guiding mechanism of the wheel trailing arm, kingpin angle variation counted as independent trailing arm suspension. Therefore, the torsion beam is the so-called "semi-independent" is from the torsion beam itself elastic, once the structure of the torsion beam for reinforcement, means that the these Xu elastic also no existence of space, if the torsion beam can not have a slight deformation should also be referred to as non-independent suspension.
The performance of the torsion beam
CTCC arena the hippocampus Z1 fleet racing may not be the biggest horsepower but the corners on the strength of the other teams daunting This is because the the 1600CC group of racing, in addition to the hippocampus fleet outside other racing torsion beam rear suspension, lost in the corners of the the "class McPherson hippocampus racing. Less space occupied by torsion beam chassis, has a very attractive for small vehicles require small body space, its compact structure. But its driving performance on strong far from satisfactory, because of the way it operates close to non-independent suspension, which filter shock or handling, are far less than traditional independent suspension. Additionally, in turn, torsion beam because the left and right side of the differential, and makes the rear wheel and front wheel "rivalry", poor steering performance. And torsion beam is monolithic, the wheels of the main pin pour, caster (adjust the torsion beam height can change), and beam angle and other parameters, can not through conventional means to take the initiative to change, in terms of control, plasticity is also quite limited . To put it plainly, the value of the existence of the torsion beam, is the province children.
The trend of the torsion beam
2011 Shanghai International Auto Show, the well-known German automotive parts manufacturers to showcase a new design torsion beam rear suspension assembly. The general torsion beam rear suspension, rear brake bridge, wheel bearings are all integrated in the arm of the torsion beam. ZF show new technologies, it is of the torsion beam and the rear wheel Hub independent open, that is the Hub of the rear wheel is a semi-movable member, and is fixed to the torsion beam. Can be modified by changing the Hub of the fixed point, the value of the static positioning of the rear wheels. This is to improve the performance of the torsion beam traveling, especially corner performance before by adjusting the beam the kingpin introversion parameters to improve. However, the cost of the traditional torsion beam suspension, the production cost of the new technology will be a key factor affect whether the depot used.

 Torsion beam cross-section in Fig.

Standard torsion beam, beams in the middle rear wheels to withstand lateral force support, you can say that both the role of the subframe for small cars generally not high rigidity, can be described as killing two birds with one stone.

This is the variable geometry of the torsion beam. Hub body can see the rear wheel attached to the top of the arm itself is based on a semi-floating state, can slightly adjust the wheel alignment parameters.