Configuration data has the mystery of the latest standards of the top ten automotive parameters

To understand the parameters, it is equivalent to dissecting the car.

The good and bad of a car can be roughly judged from the parameters and technical points. However, not everyone is an expert. Many people's understanding and evaluation of parameters still remain in the past and they have not kept pace with the times. It is time to update the knowledge in your head, and only then can you understand the list provided by the dealer and avoid being cheated. Let's take a look at the latest evaluation criteria of the top ten automotive parameters.

1, displacement and maximum power

The engine not only depends on the maximum power and maximum torque, but also the corresponding speed.

I believe many people have heard the term "power up". Its calculation method is very simple. Divide the maximum power by the displacement, and the figure obtained is. Five years ago, an increase in power of 50 kW/L was a very impressive figure, but now it is not. Only over 60 KW/L can be considered excellent. Note that the power mentioned here is a naturally aspirated engine. Turbocharging is not included in this list. The judging index of turbocharged engine power should be further increased.

The latest standard: excellent performance of over 60 KW/L, good performance of 55 to 60 KW/L, and normal of 50 to 55 KW/L.

2, wheelbase

The wheelbase division level was initiated by German cars, and was gradually promoted to the world. According to the initial standard, the wheelbase between 2600 and 2700mm is a class B car, but currently there is not less than one mainstream class B car in the market. 2700mm, more concentrated in 2800mm; as for the C-class cars, they have exceeded 3000mm. It is obviously not appropriate to use the original standard to divide the level.

The latest standards: Class C cars 3000mm or more, Class B cars 2800 to 3000mm, Class A cars 2600 to 2800mm, A0 class cars 2400 to 2600mm.

3, the maximum power and maximum torque speed

Many car buyers pay attention to the maximum power and maximum torque, but ignore their corresponding speed values. Do not underestimate this speed value, this is a very important parameter, for a 1.8L engine, for example, its maximum power is 105KW, but the precondition is that the engine speed must reach 6300 rpm. In daily life, the chance of reaching 6300 rpm is very small and negligible. Therefore, the maximum power of 105 KW is just a display. Similarly, many engines have a speed of more than 5000 rpm when they reach the maximum torque value, meaning nothing.

The latest standard: the lower the speed, the better the maximum power and the maximum torque.

4, transmission
Transmission manual, automatic and manual three types, which are automatically divided into graded and no grade two, graded and divided into 4 gear, 5 gear, 6 gear and even 7 gear, no grade is to increase gear To an infinite number. In theory, the manual transmission shifts the driver's judgment on the road, which has a direct effect. The disadvantage is that the ease of use is reduced, the automatic transmission is the opposite, and the manual integration is a manual and automatic feature. However, the transmission is not the higher the better the gear, the more gear, means that the structure is more complex and more costly.

The latest standard: Take the automatic transmission model as an example, C-class car 6 to 8 block, B-class car 5 to 7 block, A-class car 5 to 6 block, A0 class car and the following 4 to 5 block can be.

5, suspension

The role of the suspension is to filter the impact of road undulations on the body. It has a wide variety of types. In the past, at level A and below, non-independent suspensions were used more often than most of the Class B vehicles. Since its development so far, many Class A and Part A0 vehicles have also adopted independent suspension, although it is the most common McPherson type. In addition to the MacPherson style, independent suspension can be divided into horizontal arm type, vertical arm type, multi-link type, and candle type, each with its own advantages. Hanging independently, there are air suspension and active suspension.

The latest standards: air and active suspension are the best, followed by independent suspension and non-independent suspension.

6, collision results

It is not appropriate to use a single country’s crash test performance to measure the safety of a vehicle. It is necessary to add the results of the collision between Europe, North America, and China (a country of 5 stars, a total of 15 stars). Can get the highest rating of 5 stars in all three countries, then the safety of this car is indeed better than peers, and the fact that only getting five stars in China does not mean anything.

The latest standard: There are collision results in two countries, and all models with four stars or more are worth considering; a single country's score can only be qualified.

7, tires

The wider the tire, the better the handling, but the greater the friction, the higher the oil consumption. On the contrary, the grip is weaker and the maneuverability is reduced. If it is not necessary, do not change the original tire specifications, but you can use the tire specifications to measure the performance of a car.

The latest standard: The bigger and wider the tire, the higher the grade of the vehicle and the better the handling.

8, fuel consumption

The latest fuel-efficient technologies are not only variable timing valves, but also hybrid power.

As we all know, the "theoretical fuel consumption" and "constant fuel consumption" announced by car companies are all obtained in the most ideal environment, and there is no significant reference for daily use. In contrast, the credibility of fuel consumption announced by the Ministry of Industry and Information Technology will be much higher, but it can only be used as a reference. The most reliable one should be the actual fuel consumption of the car, which can be consulted with the owner who purchased the car.

The latest standard: Consult the actual fuel consumption of the vehicle. The B-class vehicle should be at 9 to 12L/100km, and the A-class vehicle at 7 to 10L/100km. The fuel consumption of the A-class vehicle should be lower than 7L/100km.

9, wind resistance

Statistics show that for every 10% reduction in the drag coefficient of a car, at least a 7% reduction in fuel consumption can be achieved, and the 100km acceleration will likely increase by 23%. In the past, the drag coefficient of the models was between 0.3 and 0.4; now, models with drag coefficients below 0.3 should be purchased.

The latest standard: 0.25 or less is excellent, 0.25 to 0.28 is good, and 0.28 to 0.30 is acceptable.

10, fuel-saving technology

The most widely known fuel-saving technologies are variable timing valves, such as VTEC and VVTI. Five years ago, if the engine was equipped with VTEC, it would be enough to boast to friends. To date, variable timing valves have been widely adopted to entry-level A-Class vehicles. The latest fuel-saving technology should be diesel technology, hybrid power, or turbocharged. It should be a double VVTI. That is, variable timing technology is used for intake and exhaust.