Which suspension system type is primarily used for heavy-duty vehicles?

The leaf suspension is primarily used for heavy-duty vehicles due to its robustness and ability to handle high loads. This system consists of multiple layers of metal strips (leaves) that are stacked together and curved to form a spring-like structure. The design allows for greater strength and load-bearing capacity, making it ideal for trucks and commercial vehicles that require durability and efficiency under substantial weight.

Leaf springs offer excellent stability, reduce body roll during cornering, and can accommodate heavy cargo, which is essential for vehicles that frequently transport loads. The inherent resilience of leaf suspension also translates to a longer lifespan, which is crucial for heavy-duty applications where maintenance must be minimized.

In contrast, other suspension types like independent suspension or coil suspension are often used in lighter vehicles where comfort and handling are prioritized over load capacity. Hydraulic suspension, while providing a smooth ride, is generally more complex and less suited for the heavy load demands specific to heavy-duty vehicles. Hence, the preference for leaf suspension in this context aligns with the requirements of heavy-duty operations.