Car True Expert AC Car Fuel Consumption

To show you a diagram of the performance of the engine (in this case a large engine, the same principle as a small car), these are measured on a precision test bench, which is the so-called theoretical data.

The horizontal axis is the rotational speed, and the upper convex curve is the torque performance line; The curve diagonally to the right is the power line; The three concave curves in the lower part are the fuel consumption lines.

As can be seen from the figure, when the torque is the highest and the power is relatively large, the throttle is the most fuel-efficient when the throttle is pressed to 75% to 80%.

Therefore, 1) the first gear of 2,000 rpm is more expensive than the third gear of 2,000 rpm due to the lower power output of the engine;

2) The high-end driving distance is longer than the low-gear at the same engine speed;

3) It is definitely five gears of fuel saving, and three gears of high speed, low power, and long time are all fuel-consuming factors;

4) Straight road: high-grade speed; Ramp: Fuel saving at the right gear.

My experience: mention the fifth gear as soon as possible after the start, keep the throttle 80% after the fifth gear, the speed of 80 90 kilometers, the engine speed of about 3000 rpm is the most fuel-efficient. (Engines with different vehicle weights and different fuel types are different).

I also think that the shift speed requirements in the manual are too high, because it is good for the service life of the vehicle.

1) Different, fuel consumption not only considers the fuel consumed when the engine is doing work, but also considers the distance traveled per unit time, otherwise the fuel consumed in the first gear and the second gear in the same time must be the same.

2) The distance traveled per unit time of high-end driving is longer, of course, it is more fuel-efficient than low-grade.

3) Five gears of more than 1000 rpm fuel-efficient, the principle is the same as above.

4) For the engine, the fuel consumption is only related to the speed, and the higher the speed is on the fuel consumption curve, the more the curve is always up. However, the engine power curve is in an upward state at the beginning, and the curve does not rise significantly after the transition to the maximum power speed, and even decreases (see the engine chapter of the automobile principle). Therefore, in the starting acceleration stage, it should be considered to try to make the engine in the maximum torque stage (about 2000 4000, according to the different requirements of different models), in order to save fuel in the state of constant speed, the engine should be tried to work at low speed (1000 rpm 2000 rpm).

This can be achieved by switching between the gearbox and the high and low gears.

The second gear 30 40 mentioned in the manual is correct, but it refers to the best way to work in a fully loaded state (5 people load the weight), the actual use state is not fully loaded, these parameters can naturally be reduced.

1: Not the same.

2: Fuel saving is calculated according to the distance 100km speed is definitely fuel saving too fast 180 190 will cost fuel.

3: Five-speed fuel saving.

4: I don't know.

The gear is related to the speed, try not to drag the gear, so it saves fuel.

Car fuel consumption refers to the amount of fuel used by a car to drive 100 kilometers.

Fuel consumption includes constant velocity fuel consumption and road cycle fuel consumption

1. Constant velocity fuel consumption: refers to the fuel economy index of the car when driving at constant speed on a good road surface. Constant velocity fuel consumption of 90 km h and 120 km h is used as the main evaluation index for fuel economy.

The fuel consumption of 100 kilometers indicated on the manual of domestic cars is generally the fuel consumption at the same velocity. However, due to the fact that the car often accelerates, decelerates, brakes and idles in the actual driving and other working conditions, the constant speed fuel consumption is often low, and the actual fuel consumption is quite different.

2. Road circulating fuel consumption: It is the fuel economy index measured when the car is repeatedly cycled on the road in accordance with the specified speed and time specifications, also known as multi-condition road circulating fuel consumption. The Society of Automotive Engineers (SAE) developed the SAEJ10926 road cycle test specification, which has been widely adopted.

This specification includes four different cycles: urban, suburban, interstate (55 mile h) and interstate (70 mile h).

<> "Don't complain about the high fuel consumption of your car, keep in mind this fuel consumption calculation formula, and you will know the fuel consumption at a glance.

The finished gasoline ** is higher, coupled with the reason for the cold weather in winter, I believe that many car owners complain about the high fuel consumption of the car, and even have a feeling of not being able to drive the car in their hearts. So when judging whether the fuel consumption of a car is high, which calculation method do you prefer? Is it estimated based on the cost of refueling, or is it estimated based on the number of liters of fuel added?

I believe that in the actual process of using the car, there will always be a large number of people who are accustomed to estimating fuel consumption with refueling costs, such as filling the car with 200 yuan of fuel, and the estimated mileage reaches more than 400 kilometers, which means that the vehicle costs 5 cents per kilometer. On the contrary, if the car is filled with 200 yuan of fuel, the result is less than 400 kilometers. Even when it is less than 300 kilometers, car owners may complain about the high fuel consumption of the vehicle, which is simply a "fuel guzzler".

Under normal circumstances, the cost of refueling and the number of kilometers traveled to estimate fuel consumption can be roughly estimated vehicle fuel consumption, but in fact, vehicle fuel consumption is affected by many factors, and this way of estimating fuel consumption is still not very scientific.

So how can we use scientific methods to measure the fuel consumption of vehicles? In fact, there is a formula for estimating vehicle fuel consumption in the automobile industry, as long as the owners keep in mind this fuel consumption calculation formula and use it to measure the fuel consumption of the vehicle, you can basically calculate the approximate fuel consumption of the vehicle.

For example, the fuel consumption of a self-priming engine vehicle with a large amount of luggage is the fuel consumption of the vehicle itself, which means that the standard fuel consumption of the car is about 100 kilometers. The same displacement of automatic transmission models, its fuel consumption of 100 kilometers is. Since the standard fuel consumption per 100 kilometers has been calculated with the fuel consumption calculation formula, which value should be used to compare it with it?

At this point, we need to use the actual fuel consumption of the vehicle, and the specific operation method is also very simple. Here's how:

When the remaining fuel volume of the vehicle fuel tank is about 1 4, drive to the gas station to fill the fuel, and record the current kilometers of the vehicle at the same time; When the vehicle fuel tank is left again 1 4 fuel volume to refuel, again record the number of liters on the vehicle fuel and the number of kilometers traveled on the instrument. For example, the difference between the two kilometers is 500 kilometers, and the second refueling is 35L, at this time, the fuel consumption of the vehicle can be easily calculated: 35L 500 100% = 7L.

Finally, we use the actual fuel consumption of the vehicle to compare with the standard fuel consumption, for example, the use of a manual transmission model, the actual fuel consumption of the vehicle per 100 kilometers 7L is slightly lower than the standard 100 kilometers, which means that the fuel consumption of this car which vertical key performance is acceptable, it is not a vehicle with high fuel consumption, so don't complain about the high fuel consumption of your car.

1.According to the trip computer on the car. Generally, better cars have a trip computer with real-time fuel consumption and average fuel consumption.

When you want to calculate fuel consumption, empty the data inside, and the average fuel consumption read is more accurate. Some cars do not support the driving computer or the computer does not support clearing data, so the second method can only be used.

Some people also say that the data calculated by the driving computer is inaccurate. But the amount of fuel is controlled by the car, and the car can also know the number of kilometers, so why is the data inaccurate? So I think the data calculated by the driving computer should still be reliable.

2.Each of the following steps is required to be strictly implemented, otherwise the calculated fuel consumption may not be accurate. When refueling first, add until you jump the gun, don't refuel at this time, and record the kilometers at this time.

Why is this method more accurate to calculate fuel consumption, because the size of the fuel tank of the car is fixed, and the fuel gun is also standard, so when it is added to the jump gun, basically the amount of fuel in the fuel tank is fixed, so we can use this method to ensure the accuracy of fuel consumption calculation to the greatest extent.

Of course, now gas stations always find excuses to refuel more for business purposes, such as to make a whole amount of money (strongly bs here either), so it is difficult to implement this method.

According to the description of the landlord, if the average speed is the same, the use of air conditioning is about the same, the fuel consumption is relatively large, if it is not a problem with the oil, it is suspected that the ignition timing (is automatic adjustment), it is recommended to go to the 4S shop to check it.

Car fuel consumption is calculated according to the fuel consumed by driving 100 kilometers, if you want to calculate how much a kilometer costs, it is fuel consumption x oil price divided by 100 kilometers, you get how much money is a kilometer.

If there is a traffic jam, the second line (point C to point E) takes a long time and the fuel consumption is relatively large.

Does this still count? It must be a short distance, a long time, and higher fuel consumption, and the traffic jam consumes the most fuel, so you can refer to it.

Car fuel consumption is calculated according to the fuel consumed by driving 100 kilometers, if you want to calculate how much a kilometer costs, it is fuel consumption x oil price divided by 100 kilometers, you get how much money is a kilometer.

Oil price liter fuel cost oil price = total how much gasoline is used (500 liters) total fuel consumption 10 = fuel consumption of the car per 100 kilometers (fuel consumption per 100 kilometers) then fuel consumption per kilometer yuan kilometer data 100 kilometers fuel consumption points 1 kilometer fuel consumption 1 kilometer oil price yuan.