What exactly is NEDC, WLTP, CLTC Which is the most accurate?

Unlike fuel vehicles, the cruising range of new energy vehicles has a variety of different statements. Some manufacturers will tell you their WLTP range, while some use NEDC and CLTC, and some give you data based on EPA... So you are two big, what is this, who said these things the most accurately, and what is the gap between them? Come on, today let's explain this head-wracking problem.

What is NEDC

The full name of NEDC is New European Driving Cycle, which translates to Chinese New European Driving Cycle, which is Europe

In the mainland, the Ministry of Industry and Information Technology uses it when testing the comprehensive mileage of pure electric vehicles

NEDC test standards.

However, this test is not flawless, and the NEDC test endurance that has been used since the 70s of the last century is actually tested in an ideal environment in many cases. In other words, in fact, Ta is placed on the test bench during the test, simulating the situation encountered in the actual driving process, but it is not the driving situation in the real situation. Who can guarantee that you will always move at a constant speed, without wind resistance and the impact of tires on the endurance of a car? Therefore, at present, many manufacturers have given up the expression of NEDC battery life, after all, the environment in which we drive cannot be so ideal.

What is WLTP

According to Baidu entries, we found that WLTP is the abbreviation of World-Light-Vehicle-Test-Procedure, which is the Global Light Vehicle Emissions Test Program. This procedure is a test standard for vehicle fuel consumption and emissions jointly developed by the United States, Europe, Japan and other countries. The final version was officially compiled in 2015 and is now frequently used in various countries.

The advantage of TA is that it can add more realistic scenarios, rather than just doing things in a specific environment. So Ta is the successor to NEDC, which used NEDC before, but now it is WLTP. There have also been special experiments in this regard, WLTP test data compared with NEDC test, power consumption is about 20% more. This should be the different power representation under scene switching in actual driving.

Moreover, WLTP uses a longer driving cycle, and also takes into account more realistic driving factors, such as whether you like to step on the accelerator vigorously during driving, whether you are willing to turn on the air conditioner all the time, whether you will connect some electronic devices, especially wireless charging, etc., which is also a key point that causes your vehicle to consume power. Another important point is that the WLTP test speed range is from 46-131km/h, so it seems that it can cover the dual scenarios of commuting in the city and driving on the highway.

However, WLTP also has some problems, that is, in extremely cold weather, the cruising range of electric vehicles will appear significantly reduced, which is unattainable by WLTP. So the final test endurance data. It is lower than the endurance estimate of WLTP, which is also an important point that many people say that WLTP is not so good.

What is CLTC

At the time of the prevalence of NEDC in the mainland, other countries were already using WLTPDe, such as Europe and Japan. But now the mainland has also begun to abandon NEDC endurance, launched a new CLTC exclusive test, according to the English literal translation of Ta is China's light vehicle test cycle, will take into account many problems such as domestic traffic roads, conditions and habits in the mainland.

CLTC and WLTP are very close, but the new CLTC includes three test phases in the middle, which are slow, medium and fast that you will have while driving, while WLTP contains four. The CLTC test time is 30 minutes, and the car travels 14.5 kilometers, which is more stops than the WLTP's test cycle. At the same time, the test speed of CLTC was first set at 114km/h, which is another point lower than WLTP, of course, this is because the mainland's high-speed upper speed limit is 120km/h, so compared to WLTP, CLTC combines more in line with the mainland's national conditions.

What is EPA

EPA cruising range is the cruising range test standard currently in use in the United States. Cruising range is generally divided into: EPA constant speed range: usually refers to the maximum cruising range that electric vehicles can achieve at a constant speed of 60km per hour, and no domestic car companies will use this standard.

Whose battery life data is more accurate

Come on, since you already know the test of each endurance standard, you must know who is closer to the real needs of mainland consumers. In fact, to talk about the real data standard, then the EPA is more professional, because Ta is a complete test from full charge to 0 cruising range, but it does not meet the national conditions of the mainland. Let's look at WLTP, which belongs to the test of European manufacturers, and the real situation is not much different, but the cold weather in the north is not applicable; Let's look at CLTC, there are obvious differences from the first two, but considering more actual situations, CLTC is now mainly used in China, including Tesla.

Ghost Fighting Car Viewpoint: Do you understand it now? In fact, it is not that it is inaccurate, but it is used differently in every country. EPA, WLTP and NEDC are all international test standards, and CLTC is more in line with the actual situation in mainland China.