Adaptability test of Bai Lian cheng gang Chang ‘an Auchan in alpine environment

◆ Why did you come here for a cold test?

◆ What does the alpine test measure?

　　The cold test includes many aspects such as the exterior, interior, driving state and working condition of the vehicle, but the most intuitive aspects for users are cold start, defrosting, defogging, interior heating and driving experience.

　　Let’s talk about cold start first. First, the vehicle should stand outdoors for more than 12 hours at the lowest temperature of -30 to -35 degrees Celsius. According to the testers, the test process is fixed, and they have to adjust their work and rest time according to the temperature change, usually starting work at 5-7 am. Because this time period is the coldest, it meets the test requirements. Now Mohe is just dawn at about 8 am.

　　In the cold start project, there are two dimensions to measure the results. The first is the start-up time (within 10 seconds, it is up to standard), and the second is whether it can be successfully started at one time. After both of them meet the standards, only one set of tests has been completed, and only three sets have to be completed continuously to be qualified. It is reported that there is no problem. In the case of -35 degrees Celsius, the startup time is about 4 seconds.

　　For users in cold areas, the speed of vehicle defrosting and defogging is also very important. There are also two aspects to measure this project, namely, the time spent on defrosting and defogging and the corresponding area. Testers will collect and record data for these two aspects one by one. In addition, a comprehensive evaluation should be made based on the subjective feelings of drivers and passengers.

　　In addition to defrosting and defogging, the effect of air conditioning will be verified, and the tester will record the temperature of the air outlet and the temperature near the headrest. They also said that, for example, the lower air outlet of the foot should have the same air outlet, and one foot should not be cold and the other foot should be hot. It is reported that in the weather like Mohe, the water temperature of the engine can rise to about 70 degrees in about 5-6 minutes when the vehicle is idling after starting, and warm air is blown out at the air outlet.

　　Whether electronic components can work normally in low temperature environment is also the focus of staff testing. Auchan comes standard with an instrument panel with LCD screen, which is rare in the same model. As shown on the screen, the current outdoor temperature is -18 degrees Celsius, and the instrument information is all normal. The staff introduced that in the case of -30 degrees Celsius, when the vehicle just started and the water temperature was low, there would be a slight smear phenomenon when the big numbers on the dashboard changed, but this situation did not exist after the water temperature rose. There is no such situation on the screen of the sound system next to it. It can be displayed normally at any time, and the system responds quickly.

　　Road verification is also an indispensable part of every day, and the staff will drive vehicles to crawl at low speed and test urban roads, national highways and highways every day. On the way, acceleration and braking tests will be carried out according to road conditions to simulate normal driving habits. The speed range covers 0-120km/h, and the temperature ranges from 0 to -35 degrees Celsius. And according to the temperature change of 5 degrees Celsius as a calibration to collect data. At the same time, it is necessary to analyze the driver’s own subjective feelings to find out the potential problems that may exist in the vehicle.

● Summary:

　　The "three highs" test is mainly aimed at verifying the reliability of products, and Auchan has withstood the test in these aspects. It is not difficult to see from the "three highs" test learned this time that vehicle engineers are engaged in the same boring work day after day because of their fixed workflow and specifications and harsh environment. And all this is to truly simulate the car use of local users and ensure that vehicles can be used normally in any state. As the saying goes, it takes a lot of tempering to become steel.

　　The process and specifications of the "Three High" test involve the business secrets of the manufacturers, especially the data information, so they naturally don’t want to disclose it to me as an outsider. Secondly, the time for participation is very tight, and the information that can be learned is limited. Therefore, this article can only be written from the perspective of personal feelings. However, Auchan is about to be officially listed, and these boring experiments may not be as attractive as the test drive. As for Auchan’s performance in power and control, we will present you with wonderful test drive articles at the end of the month. (Text/Photo/Photo by Liu Wei)

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