After the suspension, since fewer engine and gearbox occupation, often much larger than the front suspension design flexibility. Integral axle type rear suspension are often 90-degree vertical ground, better stability of the tire, such a simple structure more durable structures that are often used in off-road vehicles do not need to care about a certain load or handling performance. But most of the entire weight of the body by the outside rear wheel when cornering at high speed assume, will make tire temperature rises rapidly, reducing the lateral tire grip. Drag arm designed to be speaking in two ways. First we look at the non-independent arm drag this torsion beam trailing arm is connected by dragging left and right arm, so that the left and right arm above under the same drag, so it and the axle structure as in the outer wheel when cornering will bear heavy pressure. However, due to this structure also belong durable and low cost, so the domestic as Jetta, Bora, Golf, Beverly, Santana etc. are using this suspension structure. And this suspension structure can be designed with a steering servo, when turning the torsion beam generated after a slight change in angle, to obtain a smaller turning radius.

And drag independent arm or drag link arm up and down the side of the tire due to the bumps do not interfere with movement of the other side of the wheel, so this structure is more likely to achieve good stability and a more comfortable ride feeling in the fierce driving will get relatively non-independent suspension better handling. However, independent rear suspension structure is often more complex, more expensive, rubber parts junction a long time there will be aging, increases in travel bumpy road noise. Rear independent suspension also with the same front suspension, suspension arm longer stable. Automobile manufacturers is how to tune the suspension system allows the car by turning inadequate? For front-engined car itself, the front is relatively heavy, it is easy to understeer, while front-wheel drive understeer more easily, so unless the body behind the center of gravity is too high or rear suspension arm is too short, otherwise the front-drive exhibit special characteristics inadequate, it is easier to control the vehicle, to obtain a relatively high safety factor.

Front-engine rear-wheel drive car is more need to focus on the design of the rear suspension, rear-wheel drive because excessive force may cause the rear wheels to lose lateral adhesion formation power flick, it is preferable to use an independent rear suspension design, suspension arm to be long, then a shorter front suspension arm design makes the rear wheels when the front wheel is greater than the acceleration and deceleration stability. When necessary to increase the heat capacity of the rear wheel is increased, to avoid the high temperature of the tire. The mid-engine design in addition to the suspension and tires close to a front-engine rear-wheel drive, the best rear track than the front track width. For normal road driving, we are obviously very difficult to find different suspension systems exhibit differences in vehicle dynamic performance only when the vehicle is cornering at high speeds close to the critical state will reflect their different characteristics. Showed different results in different real-life emergency escape suspension system often encounter unexpected situations.

Read more:
http://fespeed.talkspot.com/Blog/2014/11/03/Experience-Chery-A3-suspension-and-ESP
http://fespeed.simplesite.com/