(2), wishbone suspension system
The wishbone suspension system refers to an independent suspension system in which the wheels swing in the lateral plane of the vehicle, and is divided into double wishbone and single wishbone suspension systems according to the number of wishbone.
The single wishbone type has the advantages of simple structure, high roll center and strong anti-roll ability. However, with the increase of the speed of modern automobiles, the excessively high roll center will cause large changes in the wheelbase when the wheels jump, and the tire wear will increase, and the vertical force transfer of the left and right wheels will be too large during sharp turns, resulting in an increase in the camber of the rear wheels and a decrease in the The cornering stiffness of the rear wheel is reduced, resulting in a severe working condition of high-speed tail drift. The single-wishbone independent suspension system is mostly used in the rear suspension system, but because it cannot meet the requirements of high-speed driving, it is not widely used at present.
The double-wishbone independent suspension system is divided into two types of suspension systems: equal-length double-wishbone type and unequal-length double-wishbone type according to whether the upper and lower arms are of equal length. The isometric double-wishbone suspension system can keep the inclination of the kingpin unchanged when the wheels jump up and down, but the wheelbase changes greatly (similar to the single-wishbone type), which causes serious tire wear and is rarely used now. For the unequal-length double-wishbone suspension system, as long as the length of the upper and lower wishbones is properly selected and optimized, and through a reasonable arrangement, the changes in the wheelbase and front wheel alignment parameters can be within acceptable limits, ensuring that the vehicle Has good driving stability. At present, the unequal-length double wishbone suspension system has been widely used in the front and rear suspension systems of cars, and the rear wheels of some sports cars and racing cars also use this suspension system structure.
