Longitudinal beam

The longitudinal arm suspension system refers to the suspension structure in which the wheel swings in the longitudinal plane of the car. When the wheel jumps up and down, the single-boom suspension will cause a large change in the tilt Angle after the main pin. Therefore, the single-boom suspension is not used on the steering wheel. Double trailing arm type two swing arm suspension made of equal length, forming a parallel four-bar structure, in this way, when the wheel jumping up and down the king pin caster Angle remains the same, so the double trailing arm type suspension is used on the steering wheel. The rear suspension of the jetta sedan USES a single-arm suspension system.