You can choose a car and learn to see the parameters

In the purchasecarAt the time, we can’t help but look at the parameters of the vehicle. So which parameters are we most concerned about, and what do they mean? Today we will discuss the parameters of the vehicle.

1. Length * width * height (mm) The length, width and height of the vehicle are the basic dimensions of the vehicle.The length of the vehicle body refers to the distance between the two extreme points in the length direction of the vehicle, that is, the frontbumperThe distance from the protruding position to the protruding position of the rear bumper.Body width refers to the distance between the two extreme points in the width direction of the vehicle, but does not include the outside of the vehiclerearview mirror,Turn signal,fenderAnd in contact with the groundtirepart. Vehicle height refers to the distance from the ground to the highest point of the car, including the roof rack, but not the antenna. 2. Wheelbase (mm) Wheelbase refers to the distance between the center of the front axle and the center of the rear axle of the car. The wheelbase of a car basically represents the level of the car, just as a person’s income can indicate his social class. For passenger cars, since the passenger space is arranged between the front and rear axles, the wheelbase is an important factor affecting the ride space. The long wheelbase gives passengers more space in the longitudinal direction and can obtain more spacious leg and foot space. three. Preparation quality (unit: kg) The quality of complete sets of equipment for automobiles refers to the quality of complete sets of equipment for automobiles (such as spare tires, tools, various refueling, and fuel volume not less than 90%) according to the technical conditions of the factory. Generally, the higher the grade of the car, the higher the quality of the car, except for sports cars. Many people think that the heavier the car, the more stable it is. If you just look at the weight of the vehicle, this is true. But today’s cars are still developing in the direction of lightweight, which means that fuel consumption and emissions can be reduced, driving stability can be compensated by adjusting the suspension, aerodynamic optimization of the body shape, etc., and it is usually difficult to make the car lighter. , Which usually requires high manufacturing and research costs. Super sports cars are a good example. 4. Displacement (unit: ml) 　　pistonThe volume of space moving from the top dead center of the cylinder to the bottom dead center is called the cylinder displacement. Since a car engine usually has several cylinders, the engine displacement is the sum of the displacements of all cylinders. Displacement can be said to be one of the most important parameters of an engine, and it is directly related to many technical indicators of the engine. Generally speaking, in the respective categories of naturally aspirated and turbocharged engines, displacement and power are proportional, and displacement is also proportional to fuel consumption and carbon emissions, but this is not absolute. For example, the current 1.6L naturally aspirated engine can already have higher fuel economy than 1.8L or even 2.0L engines a few years ago.

5. Maximum power (kw) Maximum power refers to the maximum power output that the engine can achieve.With the engineRotating speedThe increase in engine power also increases. After reaching a certain speed, the power will no longer increase, so the maximum power label will also mark the corresponding engine speed. Simply put, the maximum power will affect the maximum speed you can reach, and the maximum torque will affect your acceleration performance, but the engine speed corresponding to the maximum power is very important. A high-quality engine can reach or close to the maximum torque at low speeds and maintain a wide range of speeds. It will feel that the starting acceleration is particularly large and the starting is more fuel-efficient; some engines can only achieve high torque output at high speeds. Feel the pleasure of accelerating when overtaking is called "high". Engine speed". 6. Maximum torque (unit: Nm) Torque refers to when the engine is runningCrankshaftThe average torque output is directly related to the engine speed. In some cases, it can truly reflect the "as it is" of the car. For example, when starting or driving in a mountainous area, the greater the torque, the better the car's driving performance. Compared with vehicles with the same type of engine, the greater the torque output, the greater the carrying capacity, the better the acceleration performance, the stronger the climbing force, the fewer shifts, and the less wear and tear on the car. Especially when the car starts at zero speed, it means that the greater the torque, the faster the lifting speed. Torque, like power, is one of the main indicators of a car engine.it