Longitudinal arm suspension system
The trailing arm type independent suspension system refers to the suspension system structure in which the wheel oscillates in the longitudinal plane of the automobile, and is divided into two types: a single trailing arm type and a double trailing arm type. The single trailing arm suspension system causes a large change in the caster angle when the wheels are bouncing up and down, so the single trailing arm suspension system is not used on the steering wheel. The two swing arms of the double trailing arm suspension system are generally made equal in length to form a parallel four-bar structure such that the caster's caster angle remains constant as the wheel jumps up and down. Double trailing arm suspension systems are often used on steering wheels.