What is the difference between multi-link independent suspension and torsion beam rear suspension?
2 Answers
Here are the differences between torsion beam rear suspension and multi-link independent suspension: 1. The torsion beam rear suspension is a semi-independent suspension, mostly used in compact cars. Its basic structure consists of a main beam between the two wheels, with the wheels connected to the main beam via a composite spring structure. Its advantages are simple structure and space-saving. The disadvantages are poor high-speed stability, less comfort, and average handling. However, handling can be improved by adding a stabilizer bar and a Watt's linkage. 2. The multi-link independent suspension consists of multiple links, shock absorbers, and suspension springs. The multi-link suspension can achieve the optimal position of the kingpin caster angle, significantly reducing the longitudinal forces from the road surface, thereby improving smoothness and comfort during acceleration and braking, while also ensuring straight-line driving stability. The lateral displacement of the wheels caused by the stretching or compression of the coil springs is minimal, reducing the likelihood of non-linear driving. During vehicle turning or braking, the multi-link suspension structure can make the rear wheels form positive toe-in, improving the vehicle's control performance and reducing understeer. The disadvantages are that it occupies more space and is more expensive.
To be honest, I have a decent understanding of car suspensions. The multi-link independent suspension means each rear wheel has its own complex linkage system, allowing them to move independently. This keeps the car stable on uneven roads without causing the whole body to shake. As for the torsion beam suspension, the rear wheels are connected by a rigid beam, linking both sides together. You'll feel more bumps on rough roads, especially noticeable body roll during turns. From the perspective of comfort and handling, independent suspensions perform better on complex terrains, offering precise steering at high speeds or off-road without skidding. Torsion beam suspensions are simpler and more practical, but passengers might feel more jolts on bumpy roads. Personally, I think this difference affects daily driving experiences. For example, independent suspensions provide more comfort and safety on mixed urban-suburban roads, while torsion beams save fuel and money on smooth roads. Overall, the choice of suspension determines the car's stability and is a crucial detail to consider before buying, as the experience varies significantly in different scenarios.
