Scientific Development Research

A long-travel suspension system enhances a vehicle's ability to handle complex terrains by extending the vertical movement range of the wheels. The mechanism through which it affects vehicle stability lies primarily in the coordinated interaction of structural characteristics, damping efficiency, and stiffness distribution. Excessive suspension travel may lead to geometric degradation, resulting in abnormal wheel camber angles and increased body roll; delayed dynamic response can reduce controllability during sudden maneuvers; and resonance risks may compromise tire traction stability. This paper starts from the fundamental structural correlations, analyzes the root causes of stability imbalance, and elaborates on optimization approaches such as linkage arm coordination and shock absorber parameter tuning. It further discusses the synergistic regulation of damping and stiffness, revealing the dynamic balance between suspension travel and stability, thereby providing theoretical and practical guidance for suspension tuning in off-road and household SUVs.

Long-travel suspension; Vehicle stability; Structural optimization; Damping regulation; Stiffness matching