How much is the most fuel -efficient speed?Old driver: Remember these three rules, it's enough for you to use it everyday

How fast does the car drive the most fuel -efficient? This is a topic that has been discussed for a long time. However, many riders still do not have an accurate concept. In fact, this is normal. Because the relationship between the speed and fuel consumption is very complicated, and the characteristics of different car engines are different, and the characteristics of the car are different. The answer to the vehicle.

Just like you ask: "People can eat a few steamed buns for a meal." People with a large amount of meals may have 5 people, and people with small meals may be enough. Eat a few more when working, and you can eat a few less if you don't work. There are no exact numbers to summarize everything.

The speed and fuel consumption are the same. When the speed is low, the resistance is small, and the power is small, but the engine thermal efficiency is low. After the speed is lifted, the power is large, and the resistance has increased, but the thermal efficiency of the engine has improved. In addition, it is necessary to consider the impact of road conditions, vehicle tires, wind resistance coefficients, gearboxes, engines and other factors. This is more complicated than higher mathematics, so we can't say how fast it is to save fuel.

However, some objective laws will not change. Based on these rules, we can make it easier to judge how to keep the speed to save fuel.

Law 1: At the same speed, the higher the gear level, the more fuel saving

In the case of a certain speed, the higher the gear, the lower the fuel consumption. For example, keep the speed of 60 km/h, the engine speed is 1500 rpm/cents when driving at 5 gears, and the engine speed is 2000 rpm for the engine when driving with 4 gears.

Therefore, in daily driving, if the road conditions permit, you can increase the speed appropriately to ensure that the gearbox can be hung at the highest gear. This fuel consumption dare not say the lowest, at least it is much lower than you hang the lower gear.

Law 2: Under the same gear, the lower the engine speed, the more fuel -saving

If you have raised the speed during driving, and the gearbox is also hung into the highest gear, then the engine speed is controlled at the lowest level without a proclaimed. At this time, the fuel consumption is the lowest.

For example, your car is a 5 -speed manual gearbox. You are driving on a flat road. After the 5th gear is hung, the engine speed is kept enough at 1200 rpm. The speed is the most fuel -efficient speed.

Law three: driving at a constant speed is more fuel -efficient than acceleration

During driving, the engine needs to continue to output power. When driving at a constant speed, the motor of the engine only needs to overcome the driving resistance of the car. In addition to overcoming driving resistance during the acceleration, the speed of the car must continue to increase the speed of the car. Therefore, the more motivation to be needed, and the more gasoline consumed.

Therefore, if you want to get lower fuel consumption in daily driving, try to keep driving at a uniform speed when the road conditions permit. If the road conditions are complicated, try to make the speed fluctuations smaller, so that you can get lower fuel consumption.

It is estimated that some people will ask here: Doesn't anyone say that the engine is the highest thermal efficiency and the lowest fuel consumption at medium speed? Why does the article say that the fuel consumption is low at low speed? This is because although the heat efficiency is low at low speed, the power required at this time is less. Even if the efficiency is lower, the total amount of gasoline consumes is very small. The engine output power corresponding to the high thermal efficiency interval is high. Although more gasoline energy can be converted into power, there are many gasoline.

For example, the mineral water of the supermarket, one dollar of retail for one dollar, buy a box of 24 bottles for 12 yuan. But you are thirsty now. You only need a bottle of water. Obviously, although buying a bottle is not so cost -effective, you spend the least money. Although it is more cost -effective to buy it, it costs a lot. The heat efficiency of the engine is the principle. Although the heat efficiency at low speed is low, the power I need is very small, and the efficiency can not hold less demand. The output power of the high thermal efficiency interval of the engine is high. At this time, it can only be said that the utilization rate of gasoline has increased, but the amount of usage is not low.

However, the most fuel -efficient method is basically corresponding to the most Buddha -based driving style. Although there are less gasoline consumed in this, the driving time is longer and the power reserves are weaker. It is not particularly cost -effective. So we know how to save fuel, there is no need to pursue the lowest fuel consumption, because the lowest fuel consumption is not driving.

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