What Are the Types of Non-Independent Suspensions?
3 Answers
Non-independent suspensions can be categorized into the following types: torsion beam non-independent suspension, trailing arm non-independent suspension, and leaf spring non-independent suspension. In modern passenger cars, these are typically used only in models with strict cost controls. Independent suspensions mainly include MacPherson strut, double-wishbone, multi-link, and linked strut types, with most modern passenger cars adopting independent suspension systems. The suspension refers to all the force-transmitting connection devices between the car's frame and axle. Its function is to transmit forces and torque between the wheels and the frame, cushion the impact from uneven road surfaces transmitted to the frame or body, and reduce vibrations caused by such impacts, ensuring smooth vehicle operation.
Friend, as a car owner with years of driving experience, non-independent suspensions indeed come in several common types, mainly divided into three categories: The first is the beam-type suspension, which rigidly connects two wheels like a large beam. Many pickup trucks and off-road vehicles use this type—simple and sturdy in structure, but it can be quite bumpy on uneven roads. The second is the torsion beam suspension, which is semi-independent but essentially still non-independent. My old sedan had this type for the rear suspension—better support in corners and space-saving. The third is the leaf spring suspension, commonly used in older trucks and large vehicles, employing curved steel leaf springs for shock absorption—durable but less comfortable. Overall, these designs are simple and have low maintenance costs, but vibrations are noticeable at high speeds or over speed bumps, affecting passenger comfort. I think they're common in urban SUVs because they're affordable and reliable, but I recommend owners pay attention to suspension wear to prevent body tilting from compromising safety.
In my extensive driving experience, the fundamental types of non-independent suspensions include solid axle suspension, torsion beam suspension, and leaf spring suspension. The solid axle suspension is the most traditional, where wheels are connected by a fixed axle, commonly seen in Jeeps and older SUVs. Its advantage lies in strong impact resistance, making it suitable for off-road use, but the downside is poor comfort. Torsion beam suspension is modern and popular, improving maneuverability to some extent in compact cars. Leaf springs are used in heavy-duty vehicles, durable but with significant vibration. Non-independent suspension has a long history, evolving from the era of horse-drawn carriages, and was widely adopted in early vehicles. It is still used in economy models today, mainly due to its simple structure, fewer failures, and low maintenance costs. While driving, I've noticed its pronounced body roll during turns, requiring steady handling at high speeds to avoid excessive sway. When tire wear is uneven, it's crucial to promptly correct the suspension alignment to ensure driving stability. Overall, there are few types, but they are highly practical.
