How is the comprehensive fuel consumption of a car calculated?
2 Answers
The calculation method of comprehensive fuel consumption for a car: Calculate fuel consumption through the relationship between distance and speed. 1. Record the mileage: Fill the car with fuel until the pump automatically stops, and record the current mileage. 2. Record the amount of fuel added: The next time you refuel, fill it until the pump automatically stops again, and record the amount of fuel added. 3. Calculate using the formula: Calculate the distance traveled since the last refueling, and then determine the fuel consumption based on the relationship between distance and speed. Below is an introduction to a more scientific method for calculating fuel consumption: Personal driving habits, road conditions, vehicle load, tire pressure, and weather can all affect fuel consumption, making it vary. A more scientific approach to calculating fuel consumption involves determining the average value. By recording data from multiple refueling sessions over a distance of 10,000 kilometers, and then taking the average of the highest and lowest fuel consumption values, the resulting data is relatively more scientific.
As a seasoned professional in automotive testing, I'm quite familiar with fuel consumption calculations. The combined fuel consumption is an average value obtained through official standardized tests, such as measurements conducted in laboratories simulating urban and highway driving conditions. The tests include phases like starting, accelerating, constant-speed cruising, and stopping, replicating various scenarios of daily driving. The calculation divides the total fuel consumption by the total distance traveled, typically expressed in liters per 100 kilometers. Under standards like NEDC or WLTP, urban driving accounts for about 35% and highway driving for 65%, with a weighted average producing the advertised figure. However, actual driving often results in higher fuel consumption because the tests overlook factors like traffic congestion, air conditioning use, or sudden braking. I advise car owners not to rely solely on official data but to conduct their own tests: fill up the tank, drive a fixed distance, then refill to calculate their personal fuel consumption. This method provides a more accurate reflection of real-world usage. Additionally, paying attention to driving habits—smooth acceleration and maintaining a steady speed—can save a significant amount of fuel. While the tests are rigorous, the margin of error is not insignificant, so it's more important to consider your actual driving needs and conditions when purchasing a car.
