From a design perspective, the wheelbase is an important parameter, which is closely related to the performance of the car. The wheelbase determines the position of the car's center of gravity. Therefore, once the wheelbase of the car is changed, the general layout design must be re-designed, especially the size of the drive train and body parts, the parameters of the spring and shock absorber in the suspension system, and the size of the steering trapezoidal tie rod in the steering system. At the same time, the change of the wheelbase will also cause changes in the axle load distribution of the front and rear axles. Therefore, the influence of these factors on the braking, handling and ride of the car must be considered. Therefore, the wheelbase parameter will definitely be noted in the technical performance table of the car, which shows that it has a very important reference function.
From the perspective of actual use, the length of the wheelbase directly affects the length of the car, and then affects the interior space of the car. The wheelbase of a mini car is generally less than 2200mm, and the leg space of its rear seat is small. If an adult is sitting on the back seat, the knee is usually placed on the back of the front seat, and the legs cannot be extended at all. Sitting in a car gives a sense of depression, not to mention using it as a business car and taxi. Compared with the mini-wheelbase, the wheelbase of ordinary cars and mid-range cars is generally longer, so the rear seat space is relatively large. Adults can sit down on the wheelbase more easily, so whether this class of cars is a family The use of cars, taxis and business cars is very popular.
After determining the length of the car, the wheelbase is the most important factor affecting the riding space. The long wheelbase increases the longitudinal space of the occupants, which will greatly increase the foot space that affects the ride comfort of the vehicle. Although the wheelbase is not the only factor determining the interior space, it is the fundamental factor.
At the same time, the length of the wheelbase has a great impact on the comfort and handling stability of the car. Generally speaking, the higher the sedan class, the longer the wheelbase. The larger the wheelbase, the longer the cabin length, the wider the seat space for the occupants, and the better the anti-pitch and yaw performance. The longer the wheelbase improves the stability of straight-line cruising, the lower the steering flexibility and the larger the turning radius. The mobility of the car is also worse. Therefore, a trade-off must be made between stability and flexibility to find the right balance. Of course, in high-end long wheelbase cars, such shortcomings have been compensated by other high-tech devices.