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In the consumer's inherent impression that the bigger the car, the heavier the weight, the more dominant it will be in the collision process. Is that the case or not? Recently, the auto media "change car Lab" conducted a crash test, using the Dongfeng popular T5L as a cart and Mercedes-Benz smart Fortow as a car. As for why they chose these two cars, the media explained that the Dongfeng popular T5L scored only two stars in the C-NCAP, while Mercedes-Benz smart Fortow got a five-star rating in E-NCAP, if the Smart could not even hit the popular T5L, let alone other five-star safe models.

In the course of the experiment, the two cars will collide 50% of the Mercedes-Benz Smart body at the speed of 64km/h, and then evaluate the car body deformation and dummy injury data.

After the completion of the collision test, the two cars deviated to varying degrees, and the lighter Mercedes-Benz Smart was knocked out of a longer distance. From the slow-release point of view, the two cars do not have side airbags, but the front airbags burst in time and received the head of the dummy. From the overall appearance, the collapse degree of the popular T5L is smaller, the cockpit is more complete, and only a slight depression occurs above the B column. On the other hand, the Smart looks long, the A-pillar is severely bent and the cockpit is invaded seriously.

In the subsequent dummy data analysis, Mercedes-Benz Smart head injury value reached 160, twice the lower limit of the national standard, neck injury value is also several times the lower limit of the national standard, large and small legs were fatally injured, which means that the probability of survival of the dummy is extremely low. In terms of the popularity of the T5L, the injuries to the legs, waist, chest and neck of the dummy are all within the scope of the national standard, which means that the probability of injury of the dummy is low, but the head value of the dummy exceeds the lower limit of the national standard. it means that the dummy also faces fatal injuries to the head.

(Mercedes Benz smart Fortow)

(Dongfeng popular T5L)

Staff analysis said that the Dongfeng T5L airbag bomb is early, because the effective time of the airbag is only 70 milliseconds, which means that there is a problem with the driver restraint system of the popular T5L.

In view of the probability situation, the media decided to do a collision experiment, which was adjusted to 50% of the front collision of the popular T5L body.

After the crash experiment, the Mercedes-Benz Smart was hit further, the body deformation was similar to that of the last test, and the dummy had a very low probability of survival. As for the popular T5L, due to the larger area of the collision with Mercedes-Benz Smart, the vehicle deformation has also changed, the A-column bends slightly, and the B-column also appears depression, but the overall appearance does not change much from the last time.

In the dummy data analysis, the head injury value of the popular T5L dummy is 71.04, which does not exceed the lower limit of the national standard, but one person is in the range of serious injury. In addition, the risk of injury to the right calf is increased, and the degree of chest injury is lower. It can be seen that there are still some problems in the popular T5L security constraint system.

Generally speaking, when the two vehicles collide with a large difference in mass, the heavier vehicles occupy more advantages in the collision, and the height of the anti-collision beam will also have an adverse impact on the construction of cars with lower mass. Secondly, from the two popular T5L collisions, even if the cockpit remains intact, the occupants may be fatally injured if there is something wrong with the vehicle's restraint system. Therefore, the vehicle mass and the occupant safety restraint system are of great significance to the vehicle safety performance.

Finally, Smart got a five-star rating in E-NCAP, making it a safer car. However, in both collisions, the body deformation of Smart was so serious that the dummy died twice. It can be seen that the performance of Mercedes-Benz smart Fortow in domestic security protection is not as good as that of overseas versions.

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