For things that use digital quantification, we always have the inertia of thinking that the bigger the better (or the smaller the better), especially if we choose to buy a car. We Chinese people like to buy cars and they like 'big'. Big, it looks like the atmosphere; the interior space is big, so comfortable to sit in. To measure how big the vehicle is, the first thing to do is to look at the length and width of the car, and then it depends on the wheelbase. But many people do not understand the axis. What is the difference from the end, what's the effect? Today, tea brother talks about this topic with everyone.
What is the wheelbase?
The wheelbase is the distance from the center of the front axle of the car to the center of the rear axle. The distance between the two vertical centers of the vehicle is the distance between the two vertical centers of the car and the two vertical lines perpendicular to the longitudinal symmetry plane of the car.
From a design point of view, wheelbase is a very important parameter, and it is closely related to the performance of the car. The wheelbase determines the position of the center of gravity of the car. Therefore, once the wheelbase of the car changes, the overall layout design must be re-established, especially the drivetrain and The dimensions of the body part, readjust 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 and load distribution of the front axle and the rear axle, which must be considered. Factors affect the braking, handling and ride comfort of the car.
From a practical point of view, after the captain is identified, the wheelbase is the most important factor influencing the seating space, because the occupant seats of the two-passenger and three-chamber passenger cars that make up the vast majority are arranged between the front and rear axles. The long wheelbase increases the longitudinal space of the occupant, which will greatly increase the foot space affecting the ride comfort of the vehicle.
Is the longer the wheelbase the more comfortable?
The comfort of the vehicle is not only determined by the interior space, but also by the comfort of the seat, the sound insulation effect, the degree of softness and hardness of the chassis suspension, etc. Now many manufacturers understand that consumers pay attention to the rear legroom. So the seat cushion is short, the front seat back is thin and it can be replaced with 'luxury' legroom, and even the Erlang leg can be tilted, so that the interior space of the two wheelbases of the same wheelbase is different. But the cushions do After thin and short, it will definitely affect the ride comfort and thigh support. It is not suitable for long time ride. On the contrary, some models do not look eye-catching, but it feels like sitting on a sofa.
And the wheelbase is not the only factor to determine the space inside the car. The wheelbase can only represent the length of the car body. The interior space is also determined by the width of the car body and the space design of the car. For example, the middle platform of the second row is too high to sit. The passengers in the middle are very aggrieved, which is not related to the length of the wheelbase and is related to the design.
The longer the wheelbase is, the worse the steering is?
In general, the long-wheelbase vehicle has better anti-pitch and yaw performance, but the long wheelbase improves straight-line cruise stability, while the steering flexibility is reduced, the turning radius is increased, and the mobility of the vehicle is also poor. It also falls. Therefore, a trade-off must be made between stability and flexibility to find the right balance point. Of course, in the high-end long-wheelbase sedan, such shortcomings have been made up by other high-tech devices, such as Porsche's Wheel steering technology.
There are many car companies that are now looking to take care of Chinese people’s preference for large space, and the wheelbase of foreign models has been extended, such as the BMW 3 Series. However, many people say that such practices affect the handling performance of vehicles. Tea Brothers believes that the wheelbase is longer. In theory, it affects a certain control, but as an ordinary person, it is difficult to feel the distance of 10cm wheelbase in daily driving.
How to divide car level by wheelbase?
When the first German Volkswagen began to promote its platform strategy, they divided the vehicle platform into A00, A0, A, B, C, and D grades according to their size and positioning. The time is mainly to look at the wheelbase and displacement of the vehicle. However, as the car is gradually reduced in size, the basis for the displacement is getting weakened. Now the basis for dividing the car level is mainly the position of the wheelbase and the vehicle.
A00 mini car
The wheelbase of A00 passenger car should be between 2m and 2.3m, such as Alto, Smart, etc.
A0 small car
The wheelbase of A0 passenger cars ranges from 2.3 meters to 2.5 meters, such as Volkswagen POLO, Honda Fit, etc.
A-class compact
The A-Class has a wheelbase ranging from 2.5 meters to 2.7 meters, such as the Volkswagen LaVida, Ford Focus, and Toyota Corolla. The A-Class is the most widely used family car in China.
Class B medium car
The class B mid-range passenger car has a wheelbase of approximately 2.7 to 2.9 meters, such as the BMW 3 Series, Volkswagen Magotan, Honda Accord, and Toyota Camry.
C-level administrative large and medium-sized car
The wheelbase of Grade C luxury passenger cars ranges from 2.8 meters to 3.0 meters, such as Audi A6L, BMW 5 Series, Mercedes-Benz E-class and other models
D-class luxury car
Most of the D-class luxury passenger cars are of a stylish, spacious interior, and the engine power is also very strong. The wheelbase is generally more than 2.8 meters, and the displacement is basically more than 3.0 liters. The common D-class cars are the Mercedes-Benz S-series. BMW 7 Series, Audi A8 and Rolls-Royce, Bentley and other brand models.
