The Volkswagen CC was broken and the paint on the telephone pole was just peeled off. It really has nothing to do with Volkswagen.
"The Volkswagen CC was broken in a crash!" In recent days, the Volkswagen car circle has been almost flooded with this news. At about 0:50 on December 13, a serious bicycle accident occurred at the intersection of Tongxiang Road and Yaodu Avenue in Qiaocheng District, Bozhou City, Anhui Province. While a Volkswagen CC sedan carrying 5 people was traveling at high speed, the vehicle lost control and drifted. It hit a telephone pole on the roadside, killing two people on the spot.
The video footage went viral on major websites. While we felt sorry for the deceased, countless people also started a "new round" of discussions about "whether German cars are safe." Because the Volkswagen CC involved was cut into two sections by a telephone pole, but the telephone pole did not move at all (maybe it just lost a layer of paint).
At such a speed, such an impact
No matter what car you change, the result may be the same
This makes everyone sigh at the high quality of domestic telephone poles. , began to question the "conscience" of the public. But if we look at this matter objectively, we cannot deny that the most vulnerable part of a car has always been the side! We can clearly see from the video that the point of instant impact is located on the rear door of the CC near the B-pillar.
What’s in the car door? A thin outer panel + a thin inner panel + a W-shaped so-called "beam". This itself is not designed to withstand high-speed impacts! Even if it is a "car body side impact test", the impact object is not a steel pipe. In fact, some experiments involving high-speed side impact on steel pipes have been conducted abroad, and the result was that they were "cut into two pieces." (You have to know how abnormal the thickness of the steel pipe of the telephone pole is!)
There are many reasons for the accident
Speed, road surface, and... tires!
Therefore, if the same instantaneous impact is replaced by another brand or model of car, it is estimated that the final result will be the same with a high probability. Therefore, I think that instead of discussing the materials and design issues of the car itself, it is more practical to discuss "how the accident happened."
The first accident occurred near the intersection of Yaowang Road in Bozhou, Anhui. According to the local speed limit in Bozhou, the speed limit on this road should be 60km/h, and the vehicle involved in the video was much higher than the limit. Speed (what kind of speed is 60km/h in the picture? We can see it clearly by watching other videos!)
In addition to speeding, some "analysts" also looked at the ups and downs of the road surface. Some analyzes have been carried out from professional perspectives such as "rescuing the car" after losing control of the direction. But I think that in addition to these factors, the vehicle's tires may also be one of the culprits in the accident! Because if this car was wearing winter tires, it might be able to escape the disaster!
Below 7 degrees, summer tire performance begins to weaken
Below 5 degrees, tire testing must be stopped
7 degrees is a "watershed". When the temperature is above 7 degrees, the grip performance of ordinary summer tires will be within the "normal range". Once the temperature is below 7 degrees, the friction coefficient between the summer tires and the ground will continue to decrease, and the grip will be reduced. Performance begins to show a weakening trend.
As the temperature further decreases, when the temperature drops below 5 degrees, the grip performance of summer tires has significantly deviated from the designed theoretical value. Therefore, if we look up the EU tire testing standard R117 specification, it is not difficult to find that it is mentioned in it: the temperature condition for dry road performance testing is an environment where the "temperature must not be lower than 5 degrees", otherwise the measurement will be inaccurate.
The temperature on the night of the incident was -4 degrees
Original summer tires + speeding = slippage
(According to the very strict standards of the tire industry, the temperature was below 7 degrees Just consider changing to winter tires) As for the tires of ordinary civilian cars, summer tires are usually used at lower temperatures due to practical economic issues. But usually when the temperature is below 0 degrees, if you continue to use summer tires, you must be very, very, very careful! ! !
Especially the thin ice that may be encountered on the road when the temperature is below 0 degrees, which is almost a "summer tire killer". It will cause the vehicle to lose control and skid instantly. When the temperature is below minus 5 degrees Celsius, or even below minus 7 degrees Celsius, the grip of summer tires will basically be "very bad". If you force yourself to use summer tires at this time, you are irresponsible for your own safety.
My colleague "Tai Ge" paid special attention to and investigated the weather forecast for the night of the incident in Bozhou, Anhui, and found that the temperature in Bozhou that night was minus 4 degrees! The incident occurred just before 1 a.m., which is almost the coldest time of the day. And we know that the original tires matched to the car when it leaves the factory are summer tires (without exception, including the original tires of Volkswagen CC).
The temperature is too low, it is recommended to change to winter tires
Also don’t forget: turn the direction lightly and brake slowly!
Previously, a car owner from Taiyuan Xiaodian District said that he wanted to replace his car with a set of summer tires in the near future, but I "stopped" him. What is the current temperature in Taiyuan? I never thought it would be better to ride it for a long time. It is a tire of Goodyear that focuses on long mileage and quiet performance. The main emphasis is on the high strength and good durability of the carcass structure.
– But it’s a summer tire! Not winter tires!
This accident in Bozhou comes to mind: a speeding Volkswagen CC encountered a driver who was not skilled enough. How could the poor summer tires not slip? Of course, nine out of ten accidents happen quickly, even if we Just because I have the right tires doesn't mean I can drive carelessly! The 12-word advice of "lightly steer, apply brakes slowly, and predict in advance" is effective at any time!
This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.