In general, how much oil does it take to turn on the air conditioner in summer?
Zhang Xuyang of Tongji University and others published a paper "Experimental Study on the Influence of Air Conditioning on Fuel Consumption of Light Passenger Cars" in Automotive Technology magazine. The fuel consumption of six vehicles with displacement from 1.4L to 1.8L under NEDC, CLTC and WLTC was tested internally. What was the result? The increase of fuel consumption by air conditioning is about 15% to 26%, with an average of 20%, which is easy to remember.
As we mentioned in the previous video, the average mileage of family cars is about 1 year, 12000km, which means 1000km per month. An ordinary car with 65438+1 00000, the fuel consumption per 100 kilometers is 7L. When the air conditioner is turned on, it will probably increase by 1.4L,1month. Because the air conditioner is turned on, it burns a little more oil, which seems to be 14L. The length of summer is different in different places, so the months when air conditioning is needed are different.
I often run downtown, and my membership fee is relatively high.
Hearing this, a friend wants to say, "Hey, according to your previous calculation, the fuel consumption has only increased by 20%, that is, 1.4L, the fuel consumption of my car with air conditioning is two or three times higher. How to calculate? " It has increased by 30% to 40%. Is there something wrong with the data? There's no need to make a fuss. Different people drive, different road conditions are very different, which is also an acceptable floating range.
For example, NEDC is a test standard, which integrates various road conditions, including idle speed, uniform speed, acceleration, deceleration, urban areas, suburbs and other working conditions. If you drive in the city all the time, your engine will be less efficient, and you will really burn more oil by turning on the air conditioner. Still in the previous paper, there are also test data: under NEDC working conditions, if the air conditioner is only turned on in the urban area, the fuel consumption will increase by 465,438+0%, only in the urban area. A car with a fuel consumption of 7L per 100 km will be 9.87L when the air conditioner is turned on, which is close to 100 km 10L.
Consider the month: friends in North China turn on the air conditioner every four months in a summer, burn more 1 14.8L, and spend 975 yuan and 80 cents more on gas. Friends in South China, the air conditioner has been on for 8 months, burning 229.6L more oil, 195 1.60 yuan. If you drive more cars at ordinary times, 2000 yuan won't do, it's still a powerful figure. Don't buy a mobile phone if you drive too much, right?
If you often run high-speed, you will spend less.
Of course, on the other hand, if you often run at high speed, the air conditioner will burn less oil because of the high thermal efficiency of the engine. According to the test data of the paper, the fuel consumption of air conditioners only increased by about 5%, and the fuel consumption per 100 kilometers increased by 0.35 L.
If cars are usually used for high-speed and business trips, air conditioning only needs us to spend more 1 or 200 yuan all summer, which is lower, right? So some friends don't have to worry about whether the air conditioner is broken or the engine needs maintenance when they see that their fuel consumption is high and low. If you usually drive at high speed and rarely run in the urban areas with traffic jams, the fuel consumption gap will be two or three.
Is there any way to save oil?
Although the fuel consumption will increase when you turn on the air conditioner, you can't help turning it on in such hot weather, can you? Is it expensive to drive to the hospital for heatstroke? Is it worse to faint and crash? In fact, there are still some ways to help our air conditioner save as much oil as possible. The first thing is to use internal circulation as much as possible to avoid the escape of cold air.
For example, open the circulation for half an hour, circulate outside for a few minutes to ventilate, and then switch back to the internal circulation, so as to operate. Li Yizhen of Jilin University has a master's thesis "Load Determination and Application Analysis of Internal and External Circulation Mode of Automobile Air Conditioning", which has a test. It is found that the circulation mode has the greatest influence on the vehicle cooling load. Under standard working conditions, the external circulation will increase the cooling load by 19 1.8%.
External circulation is like a crack in a water cup, and water will slowly flow out. Put it in the car, it means that the air conditioner has run away, and naturally it will cost more money and oil. If the car is advanced and automatically air-conditioned, the way to save fuel is to raise the set temperature appropriately under the premise of comfort. Because now the automatic air conditioner of new cars generally uses variable displacement compressors.
When the temperature in the car is lower than the set temperature, the compressor will run at a low speed to achieve the minimum power consumption to meet the cooling demand. It's a bit like the inverter air conditioner at home. It's cool in the room and the air conditioner won't be completely turned off. Reach over, the air conditioner will be a little less windy, but it will still be cold, just not as cold as before.