The lateral stabilizer bar, also known as the anti roll bar, as the name suggests, is designed to prevent lateral forces during turns. Independent suspension generally requires the installation of anti roll bars, as the two side wheel suspensions of independent suspension move independently up and down, without interfering with each other. The advantages are obvious, but the disadvantages are also significant, that is, roll becomes more severe, and the centrifugal force during turning causes the vehicle's center of gravity to shift outward. As a result, the outer suspension is excessively compressed, while the inner suspension is excessively stretched, resulting in more severe center of gravity deviation, Even accidents involving rollovers are prone to occur.
Instead of independent suspensions, such as the torsion beam rear suspension structure, this problem is not very common because the coaxial wheel suspensions on both sides are connected by a thick steel beam, and the opposite force on the left and right suspensions will be offset and limited by the torsional rigidity of the steel beam. An interesting phenomenon appears here. In fact, the lateral stabilizer bar used for independent suspensions comes from this characteristic of the torsion beam, That is to say, a torsion steel beam is connected between two independent suspensions, but the principle is the same, and the structure is still very different. If such a thick steel beam is directly suspended with a torsion beam, independent suspension is meaningless. So the lateral stabilizer bar, as a torsion beam, has a great deal of elasticity to balance and restrain the torsional force of the suspension on both sides, while retaining the independent motion of the independent suspension.
Small cars, and even many medium-sized cars, use a MacPherson structure for the front suspension. Without the setting of a stabilizer bar, the driving characteristics are very poor, especially when turning at high speeds, which can scare the driver. Therefore, car enthusiasts do not need to worry about the presence of a stabilizer bar.
The suspension system, which uses torsion beams, already has sufficient torsional rigidity and does not require the design of additional lateral stabilizer bars. For rear multi link independent suspension, the lateral stabilizer bar is usually a standard configuration, especially in today's SUV market, where the rear independent suspension almost always has this curved stabilizer bar without even looking at it.
The lateral stabilizer bar is a steel beam, and of course, its torsional characteristics depend on the material, with a fixed characteristic curve. Therefore, some high-end sports cars are not satisfied with this. Electromagnetic variable torsional force lateral stabilizers have also emerged, which can quickly change the torsional characteristics through complex electromagnetic effects, allowing the vehicle to control the lateral force anytime and anywhere during intense driving. This significance is quite significant, It can almost make a significant leap in the sporty characteristics of the chassis.
