Is the third row of seats in the 7-seat car safe?

In the past two years, the 7-seat car suddenly fired. The seven SUV Toyota Highlander did not sell you, and the seven Wuling Hongguang and Po Chun 730 can sell tens of thousands of units a month. Passenger cars are generally five seats. To arrange seven seats, we must add a row of seats in the traditional boot position. Then, the question is: What is the safety of the last row of seats?

The 7-seat version of the SUV will generally have five versions. Some compact MPVs will also be available in both 5-seater and 7-seater versions. The seven-seater version is equivalent to installing a row of seats in the five-seat rear compartment. This row of seats is very close to the rear and looks relatively thin, and some people are worried: sitting in the last row Do you not get crushed after you hit the rear end?

â–² Toyota Highlander's third row of seats

Indeed, the biggest concern for the third row comes from the rear-end accident. If it is a side collision, this row is not very different from the first two rows. If the collision is from the front, this row is farthest from the impact point, but it can be lighted.

If no third-row seats are installed, the entire tailstock can be considered as the “crash energy-absorbing zone” at the rear-end collision. If there is a third-row seat, the distance from the third-row seat to the rear of the seat will be reduced. Most of them. The crumple zone is small. In the rear-end collision, the passenger may follow a “crash” and the chance of injury is even greater.

â–² Highlander's 7-seat and 5-seat status, the rear "crush" space is still very different

Secondly, in order to give passengers more space, and to have a leveled-up trunk after folding, this row of seats is generally thinner than the front row and there is doubt about the strength of the seat back. If in the rear-end collision, the backward deformation of the seat back is too large, the passenger's head may hit the tailgate, and even if it does not hit the head, it will be possible to flash it.

â–² The design of the seat is not reasonable or the quality is not good.

Of course, this is only an imaginary one. There are only two ways to understand exactly what the security is: one is to look at the casualties of the third row of passengers in an actual crash; the second is to conduct a crash test.

The United States is particularly leading in the analysis of accident data, but there is no figure in the third-row passenger casualties. This is mainly because the occupancy rate of the third-row seats of cars is not high, and there are very few samples involving casualties in the third row in actual accidents.

Collision testing is even more of a play. For the 7-seater, everyone is very concerned about how much damage will be done to the third-row passengers during the rear-end collision. However, in reality, whether it is the United States or Europe, whether it is China or Japan, the official collision test does not include any rear-end testing.

U.S. non-profit organization IIHS (road insurance association) has a rear-end test, but the speed is very low, the purpose is not to test the damage to the occupants, but to see the front and rear bumpers designed to be reasonable and unreasonable.

â–²IIHS's "tail-ending test" is actually testing the car bumper

Why does the car crash test "head to head"? Because the crashed parts of the accident are mostly on the side of the front and side of the vehicle, the number of rear-end collision accidents is relatively small; moreover, in the rear-end collision accident, the proportion of casualties among passengers is relatively low. According to NHTSA (United States Highway Traffic Safety Administration) statistics, rear-end accidents account for 23% to 30% of all accidents. The death toll in the rear-end accident accounted for about 6% of the total accident deaths.

Therefore, the world's major official collision safety tests will be done on the front and side of the car, and some will also test the strength of the roof to see if the car body is deformed during the rollover. The rear-end test has always been missing.

To complain here, the current car crash test is not only "no matter how many people care about", even the second row of passengers are not in the eyes. In the official collision test, the second-row seats are generally not even test dummy, the United States NHTSA collision test has been engaged in nearly 40 years (started in 1978), has always been to see only the protection of the driver and the Deputy driver It was only announced in May this year that 2019 will introduce the test dummy in the back row in the crash test.

As a result of this practice, all car companies have focused on collision protection in the first row, and the safety measures for the second row of occupants are not positive. In the simplest example, the front passenger airbags of the second row of passengers have not been seen, and they are not yet under development—not to mention that the front row airbags are not required in the second row. The degree of injury is only a difficult and costly process for designing and installing front airbags for rear seat passengers. Now, automakers are not very active.

There is no official tail-end test, but it does not stop the curiosity of private individuals. A German auto magazine AutoBild wanted to see if the car that got a five-star safety evaluation crashed, and if it had a "five-star butt", so they joined DEKRA (German Association of Motor Vehicles Supervision) and bought two cars in Europe. Get NCAP Five Star Safe Car, a Renault Grand

Scenic, a Toyota IQ.

Renault Grand Scenic is a compact MPV with three rows of seven seats, which is exactly what we are concerned about.

â–² Renault Grand Scenic is a compact 7-seat MPV

They put test dummy in every seat in Grand Scenic, and placed a travel limousine about 1 meter 2 in front of the car, probably mimicking the red lights waiting in line for parking. Then, a Mercedes-Benz ML crashed into the tail of the Grand Scenic at a speed of 40 miles per hour (about 64 kilometers) - and the consequences were rather serious.

â–² German Auto Magazine's rear-end test, Mercedes-Benz ML hits Renault Grand Scenic

The distance from the headrest to the tailgate of Grand Scenic's third-row seat is about 21 centimeters, and the Mercedes-Benz SUV hit the tail of Grand Scenic about 30 centimeters. After analyzing the third row of dummy, the passenger's head may be injured and the intracranial hemorrhage, cervical spine, and spine may be fractured, and the ribs may fracture and stab other organs.

Obviously, this is not a "five-star" car butt.

The Toyota IQ is a smaller vehicle than the Chery QQ. Considering that the vehicle is relatively weak, the "Okuma" is responsible for giving it an Opel travel sedan. The rear-end speed is also reduced to 32 miles per hour (approximately 51 kilometers). As a result, the rear occupants were even worse than the Renault Grand Scenic. In addition to head and upper body injuries, the legs could not survive.

â–²Follow-up test for Toyota car IQ

This civil version of the crash test may not be sufficient for training, but it does reveal some of the safety issues of the third-row seats. The biggest problem is that it is too close to the parking space, and there is insufficient buffer space for the rear-end collision.

Of course, we don't have to worry too much about it. After all, the number of rear-end accidents is relatively small, especially if the rear vehicle chasing after a high rate of speed is relatively rare; moreover, now equipped with a larger SUV or MPV, due to self-weight, the passive safety of the collision is relatively Better. Seven seats with smaller facets or smaller seven seats (and some with six MPVs) will have a higher chance of injury in the final row of passengers.

To mention again, when buying a 7-seater, it is better to choose the third row of passengers with adjustable headrests and models with three-point seat belts. It would be better if side curtains were available. These three kinds of equipment can better fix the position of the occupants in the collision and effectively reduce the consequences of the damage.

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