How many types of non-independent suspensions are there?
2 Answers
Non-independent suspensions are divided into 3 types: 1. Leaf spring non-independent suspension; 2. Coil spring non-independent suspension; 3. Torsion beam coil spring suspension. The function of the leaf spring non-independent suspension is to stabilize the vehicle's guiding mechanism, eliminate the need for longitudinal swing arms and lateral swing arms to stabilize the axle components, thereby simplifying the suspension system. The coil spring non-independent suspension consists of components such as coil springs, shock absorbers, longitudinal thrust rods, lateral thrust rods, and reinforcement rods, providing strong axle torsional capability and enabling smooth vehicle operation on unpaved roads. The torsion beam coil spring suspension balances the vertical movement of the left and right wheels through a torsion beam to reduce vehicle sway and maintain stability.
Having driven for many years, I can say that the main types of non-independent suspensions fall into three categories: torsion beam suspension, leaf spring suspension, and rigid axle suspension. Torsion beam suspension is commonly used in the rear axles of small cars, such as the Honda Fit, due to its simple structure and low cost. It provides stability on smooth roads but leads to noticeable body sway and increased noise on bumpy surfaces. Leaf spring suspension is typically found in commercial vehicles like the Toyota Hilux, offering strong load-bearing capacity for hauling goods but poor comfort—passengers often feel discomfort when going over speed bumps. Rigid axle suspension, seen in off-road vehicles like the Jeep Wrangler, is rugged and durable, suitable for complex terrains, though its heavy weight increases fuel consumption and makes city driving less convenient. In daily driving, the advantages of non-independent suspensions include affordability and low maintenance costs, especially in entry-level cars, but the downside is compromised comfort, affecting long-distance experiences. When choosing a car, it's advisable to pay attention to the suspension type, test-drive extensively to assess performance on turns and rough roads, and align the choice with personal needs to avoid regrets.
