Vehicle height is the distance between the highest point of the vehicle and the supporting plane of the vehicle; Vehicle width refers to the distance between planes parallel to the longitudinal symmetry plane of the vehicle and close to the outermost rigid fixing protrusions on both sides of the vehicle (except rearview mirrors, side sign lights, direction lights, turn signals, etc.). ).); The length of the vehicle is the distance between two vertical lines perpendicular to the longitudinal symmetry plane of the vehicle and close to the foremost and rearmost protruding parts of the vehicle respectively; The wheelbase refers to the distance between two vertical lines of the longitudinal symmetry plane of the vehicle at the center point of two adjacent axle wheels on the same side when the vehicle is in a straight driving position.
Length is the parameter that has the greatest influence on the use, function and convenience of a car. Therefore, the car body is generally classified by length. The length of the car body means that the longitudinal available space is empty; Width mainly affects the free space and flexibility of riding; The height of the car body directly affects the center of gravity (maneuverability) and air; After the length of the bus is determined, the wheelbase is the most important factor affecting the ride comfort. In terms of driving performance, long wheelbase can improve the stability of linear cruise, but the steering flexibility decreases and the turning radius increases.