What is the function of the anti-roll bar?

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The function of the anti-roll bar is to prevent excessive lateral roll of the vehicle body during cornering, reduce the degree of lateral roll, and improve ride comfort. The anti-roll bar, also known as the stabilizer bar or sway bar, is an auxiliary elastic component in the vehicle suspension system. It is a torsion bar spring made of spring steel, shaped like a U, and installed horizontally at the front and rear of the vehicle. The working principle of the anti-roll bar is as follows: when the suspension deformations on both sides are unequal and the vehicle body tilts laterally relative to the road surface, one side of the frame moves closer to the spring support, causing the corresponding end of the stabilizer bar to move upward relative to the frame. Meanwhile, the other side of the frame moves away from the spring support, causing the corresponding end of the stabilizer bar to move downward relative to the frame. However, when the vehicle body and frame tilt, the middle part of the anti-roll bar does not move relative to the frame.