In the mouth of some old drivers who "understand cars", they often say that the chassis of this car is good, and the chassis of that car is poor, but how to distinguish the quality of the car chassis? Car chassis belongs to some extent to the category of "metaphysics". Discerning the quality of a car chassis is like a chef discerning whether a meal is delicious or not, there are too many subjective factors, and different people will come to diametrically opposed conclusions.
In a broad sense, the car chassis includes a series of components such as the transmission system, driving system, suspension system, steering system, braking system, etc. It can be said that all components in the car except the engine and body belong to the chassis system. However, for the cars we use every day, the chassis mainly refers to the suspension system, which is a narrow concept of the chassis. I'm talking about this narrow chassis here.
So, how do we tell the quality of a car chassis? Structurally, independence is better than non-independence, arms are better than McPherson, multi-link is better than torsion beams, and the more connecting rods the better, aluminum alloys are better than iron, and so on. In fact, this is a very narrow subjective perception, just like using ingredients to judge whether a chef's cooking is delicious. The same is McPherson, and the specific structure is also very different. Many high-end sports cars also use Macpherson suspensions. Are you saying it will be worse than the double-cross-arm suspension used on hundreds of thousands of cars? The difference is even greater in multi-link independent suspension. The Sarri rear wheels also use independent suspension. Are you saying it's better than Citroën's torsion beam?
Therefore, the car chassis should not use materials and structures to discuss heroes, but look at "adjustment". This "tuning" is really a metaphysical thing, there is too much knowledge involved, a lot of things are subjective feelings that cannot be measured by data. Of course, we ordinary consumers cannot delve into these things, but can only subjectively feel the results of this adjustment. Therefore, the most basic way to judge the quality of the chassis of the car is to take a test drive. During the test ride, it is enough to feel whether the car is "stable" or not.
Stationary stable: the car is parked on a flat ground. From a distance, please check whether the body is stable, whether the body ratio is coordinated, especially the ratio of wheels to the body, and whether it feels "big head and small foot". Some cars have large bodies with noodle tires underneath. Such a car chassis is not very good. Start to stabilize: when the car starts to accelerate, it feels that the body and the chassis work synchronously, the body is stable without bumps, no front and back bumps, bumps, heads-ups and other phenomena, the driving wheels have a good grip, no slippage, the starting acceleration process is smooth, and the high speed should be reached quickly
Stable high-speed driving: When the car is driving at high speed, the wheels are well attached to the ground, the anti-interference ability is strong, the body has no suspension feeling, and it has a strong self-propelled ability. Even with a large crosswind, the car will continue to go straight without the feeling of grasping the "steering wheel". At the same time, it quickly absorbs the shock and vibration of the road surface, and does not change the direction of travel due to the undulation of the road surface.