What is the function of the rear anti-roll bar?
2 Answers
The function of the rear anti-roll bar is to prevent excessive body roll when the car is turning. Definition of anti-roll bar: The anti-roll bar is a U-shaped torsion bar spring made of spring steel, which is transversely installed on the front or rear axle of the car. Both ends are connected to the suspension through links, and the middle part of the bar is connected to the subframe through bushings. Function of the rear anti-roll bar: When the vehicle is turning, the suspension on the inside of the curve is stretched, and the suspension on the outside is compressed. At this time, the anti-roll bar acts as an anti-torsion device to reduce the stretching and compression amplitude, thereby controlling the vehicle's roll amplitude. The suspension of the inner wheel extends, and the suspension of the outer wheel is compressed. At this time, the anti-roll bar will twist to suppress this situation. An anti-roll bar that is too soft will cause excessive camber angle when turning in a car with independent suspension, reducing the tire's contact area and affecting handling.
I found that the main function of the rear anti-roll bar is to prevent excessive body roll when the car turns. It's installed between the rear wheels, like an invisible bridge. When you take a corner, as one tire compresses and sinks, it lifts the opposite tire, reducing body tilt and making the drive much more stable. Without it during high-speed lane changes or sharp turns, the car tends to sway uncontrollably, which can be quite dangerous. For rear-wheel-drive vehicles, this bar is even more crucial as it helps reduce oversteer, making handling safer and more predictable. If the bar is damaged, you'll feel significantly more body sway inside the car, and it's important to visit a repair shop for inspection and replacement promptly.
