What is the difference between a three-link and a five-link suspension?
2 Answers
The differences between a three-link and a five-link suspension lie in their damping characteristics and functions. Here is the relevant information: 1. Three-link: The link group bears the gas force transmitted by the piston pin, as well as the effects of its own swinging and the reciprocating inertia force of the piston group. These forces vary cyclically in both magnitude and direction. 2. Five-link: The five-link rear suspension can achieve the optimal position of the caster angle, significantly reducing the longitudinal forces from the road surface, thereby improving smoothness and comfort during acceleration and braking. It also ensures straight-line driving performance, as the lateral displacement of the wheels caused by the stretching or compression of the coil spring suspension is minimal, reducing the likelihood of uneven distances between the rear axle wheels relative to the vehicle's longitudinal axis, which could lead to non-linear driving phenomena.
I've driven several cars, one with a three-link suspension and another with a five-link. The three-link is a basic independent suspension with three connecting arms, commonly used in many economy cars, like some entry-level sedans or SUVs on the rear wheels. It has a simple structure, low cost, and is easy to manufacture. Driving feel: It's okay on smooth roads, but when encountering bumps or turns, the body tends to sway, and the bumps are noticeable. Over time, it can feel a bit tiring. The five-link is much more complex, with five links working together to more precisely control wheel movement, so it's common in high-end models like luxury sedans or sports cars. It drives more stably, with better grip, smoother cornering, and much better comfort. However, the five-link is more expensive and requires more specialized maintenance. In summary, the main differences are in performance and comfort: the three-link is practical and cost-effective, while the five-link enhances the driving experience. For those who frequently drive long distances or on poor roads, the five-link is recommended.
