EPA续航标准是怎么测试的

How is the EPA续航标准 tested?

The EPA续航 standard is tested using a method called "Oil and Electric Separation". First, the纯电续航 is tested by fully charging the vehicle and then testing the true hybrid state when the battery is out of power. The test includes two types of city driving cycles and two types of补充 driving cycles. The final result is calculated by combining the results of these three driving cycles with different ratios, which makes the data more representative of actual use. The EPA续航 standard is longer than other testing standards in terms of time, distance, speed, and变速. It also takes into account the influence of environmental temperature on energy consumption, making it more accurate. For pure electric vehicles, the EPA uses the MPGe method to convert the energy consumption of electric vehicles into miles per gallon, with 33.7 kWh equal to 1 gallon of gasoline. Since 1 gallon is equivalent to about 3.8 liters, this method makes the EPA testing results more similar to actual driving conditions. In addition to the EPA, the NEDC, or the new European driving cycle, is currently used more in China. However, this testing method places the vehicle on a test bench and uses a rolling resistance simulation to test the driving resistance. During the test, features such as air conditioning, headlamps, and heated seats are turned off, which makes the overall testing result significantly different from actual driving conditions.

Compared to the EPA, the NEDC test is simpler and less accurate. Therefore, the EPA续航 standard is more representative of actual driving conditions and is widely used in the United States. In addition, the EPA also has a stricter testing process and higher standards for emissions. The EPA testing process also requires the use of a special testing device called a "drive-by-wire" system, which allows the vehicle to be driven without a driver. This testing method is more efficient and accurate, as it can eliminate the influence of human driving behavior on the results. In summary, the EPA续航 standard is a more realistic and accurate way to test the续航 of electric vehicles.