Light body can really save fuel.

Theoretically, the maximum power of the engine is fixed, so the lighter the body, the smaller the engine load and the lower the fuel consumption. Just like riding a bicycle, the more things you put on it, the heavier it will be, and the more effort we need to ride a bicycle.

In the process of daily car use, the fuel consumption of many small-displacement vehicles will increase correspondingly after two more people are seated, which also proves that light body can really save fuel.

Japanese cars are actually not light.

Because we often see that after a traffic accident, the damage of Japanese cars will be greater than that of different brands at the same level, and the iron sheet of Japanese cars is relatively thin, so it is easy to press the depression with your hands, so everyone concludes that Japanese cars are thin and light.

However, we have looked at the data of many models and found that Japanese cars are actually not lighter than other brands at the same level, and there are other reasons why they are more fuel efficient.

Japanese cars have higher engine thermal efficiency.

The first reason why Japanese cars save fuel is that the engines of Japanese cars pay more attention to thermal efficiency. The word thermal efficiency of engines may be less commonly used, and we can understand it as the efficiency of engine burning gasoline to do work.

The higher the thermal efficiency of the engine, the more work it can do to make the car run farther and the lower the fuel consumption. This is actually the same as our home air conditioner. The higher the cooling efficiency, the more energy-saving the air conditioner will be.

The price of fuel economy of Japanese cars

I've driven a Toyota car for 8 years, and I've learned something about Toyota cars and read a lot of information. For example, the engine of a Toyota car has the highest thermal efficiency, which can reach 43%. However, the short board of this kind of engine with high thermal efficiency is that its power is not so good, and it pays attention to low fuel consumption while sacrificing power.

Just like many sports students have poor academic performance, sports students pay attention to physical exercise and spend all their time on sports, so their academic performance is naturally poor. Therefore, Japanese cars are soft to drive in the eyes of many people, and there is no good driving experience.

The gearbox is another reason to save fuel.

The second reason why Japanese cars save fuel is that Japanese cars, whether Honda, Nissan or even Toyota, like to use CVT gearboxes. Among many types of gearboxes with automatic transmission, CVT is mainly for smooth and fuel-saving, dual clutch is the main power, and AT gearbox has good reliability. After the CVT gearbox, which focuses on fuel economy, is widely used in Japanese cars, and with its own fuel-efficient engine, the fuel consumption can be lower.

German-American cars at the same level disdained to use CVT gearboxes, and instead used dual-clutch gearboxes with main power. For example, most of LaVida's models used Volkswagen's own dual-clutch gearboxes, which focused more on power, and the engines that accelerated German cars did not pay attention to fuel economy, so their fuel consumption was naturally not as low as that of Japanese cars.

Early Japanese cars were not fuel efficient.

Early Japanese cars only saved fuel for low-end family cars, but not for B-class cars like Camry.

Early Japanese cars, such as Accord and Camry, generally used AT gearbox, and it took 1 block a kilometer to drive out, which was no less than the fuel consumption of contemporary German cars and American cars.

The main reason why I gave up Camry when I chose a used car in the previous paragraph is that the old Camry consumes too much fuel and can't afford it.

Japanese cars have narrower tires.

Narrower tire width is the third reason why Japanese cars save fuel, which many people actually didn't expect and didn't notice.

Generally, the tires of Japanese cars are narrower than those of other brands. Toyota VIOS tires are 185mm, while the low-grade Corolla tires are 195mm, but Buick Hideo at the same level has at least 205mm tires, and some of them are 2 15 tires.

The narrower the tire width, the smaller the friction with the ground during driving, and the lower the fuel consumption naturally.