1. The multi-link independent suspension
The multi-link suspension refers to suspension structure composed of three or three link rod configured to provide a plurality of direction control, the wheel having a more reliable driving track. There are three common link, four-bar linkage, five-link and so on. However, due to the three-link structure can not meet the people’s pursuit for higher chassis handling performance. Therefore, the structure is more precise, more accurate positioning of the four-link suspension and five-link can be called a true multi-link these two structures are typically used in suspension front and rear wheels. Wherein the front suspension generally three or four-link independent suspension link; rear suspension is generally four-link or five-link rear suspension systems.
In the structure common five-link rear suspension, for example, which are five links: a main control arm, front positioning arm, the rear positioning arm, an upper arm and a lower arm. They are to produce a force in all directions. For example, when the vehicle turns left after the displacement direction coincides with the front wheel steering wheel Conversely, if the displacement is too large, the body will lose stability, wavering. In this case, the role of the positioning arm facing the longitudinal began to appear, they are primarily of the rear wheel toe angle is constrained to be in a controllable range; the contrary, since the rear wheel toe angle is constrained within the controllable range, If the angle is too large, the outer wheel will reduce the lateral stability of the vehicle, in the multi-link suspension is increased in the upper and lower control arms of the wheel for restraining the one hand, the better the wheel is positioned, on the other hand the suspension of reliability and toughness further improved.
Meanwhile, the structure of multi-link suspension by opposing front and rear upper and lower positioning arms and control arms effectively control the camber angle of the wheel. For a simple example is: when the wheel traveled road potholes, first upper and lower control arm starts swinging in the controllable range, and accurate enough to give the wheel deflection path, if uneven road continues, while the vehicle speed is accelerated, this positioning opposed longitudinal arm effect when the wheel is always fixed value within a range of travel, while the hydraulic shock absorber will be accompanied by the upper and lower control arms swing to absorb vibrations, and the main job is to control the vertical armUpper and lower control arm pivot with the wheel bouncing remains free, so that the vehicle body is always in a relatively stable state.
It is because the multi-link suspension link comprising a plurality of struts, and the link may be a force control various aspects of the wheel, the wheel can be individually adjusted in doing wheel alignment, and multi- link suspension has a great possibility of adjustment and modification of space. However, since the multi-link suspension configuration is complicated and costly, multi-part, time consuming assembly, and to achieve the durability of the non-independent suspension, always need to maintain the link is not deformed, not displaced, but also in the materials and structure optimization very elegant. So multi-link suspension is based on the pursuit of excellent handling and ride comfort as the main demands, and not suitable for all situations.