The upper and lower swing arms are not of equal length, and the appropriate length ratio is selected, so that the angle and track of the wheel and kingpin can not change much. This independent suspension is widely used on the front wheels of cars. The arms of the double wishbone are made into an A shape or a V shape. The two upper and lower V-shaped swing arms of the V-shaped arm are respectively installed on the wheel at a certain distance, and the other end is installed on the frame.
The upper arm of the unequal double wishbone is shorter than the lower arm. When the car wheels move up and down, the upper arm moves in a smaller arc than the lower arm. This will cause the upper part of the tire to move slightly in and out, while the bottom has little effect. This structure is beneficial to reduce tire wear and improve car driving comfort and directional stability.