Speaking of Euro NCAP, it is currently the most influential safety assessment institution in the international automotive industry, and one of the most authoritative evaluations recognized by the majority of automobile manufacturers and consumers, especially its independent operation mode and open and fair grading standards. Known for its rigorous and scientific testing methods, it is notoriously "strict". According to Zhao Fuquan, vice president of Geely Group, the test contents of Euro NCAP include frontal collision, side collision, side collision of column and rear impact collision. The evaluation indicators are divided into four categories: adult protection, child protection, pedestrian protection and safety assistance. , a total of more than 30 small items, involving nearly 1,000 test data. In order to obtain a certain star rating in the evaluation, in addition to the requirements of each category must meet the requirements, the total weighted scores must also meet the requirements of the corresponding star rating, that is to say each item must be good, can not be "partial." This will test the hard power of each car manufacturer. If you want to get a high star rating, every link can not be ignored. If you use a word to express it, it is "difficult"!
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The Geely R&D team relies on solid hard work. According to Zhao Fuquan, Geely engineers have done a lot of detailed development work in order to make EC7 meet European design standards. The car not only has good active and passive safety performance, but also meets a series of very difficult European environmental requirements such as Euro V emission standards and material recycling regulations. In terms of safety development, Geely has invested a lot of manpower and material resources in design and development, CAE simulation and test verification. More than 200 R&D personnel have participated in the safety development of EC7, and have carried out more than 100 vehicle crash tests, 180 The remaining slide test, hundreds of parts verification tests and a large number of simulation analysis are the result of the hard work of the Geely R&D team after more than three years of hard work. The following is a summary of the various test results and technical connotations of Emgrand EC7 as follows:
1. Adult protection
In terms of adult protection, the EC7 takes into account the close relationship between the occupant space and the surrounding contact components. Through the multi-round optimization of the overall arrangement, the comfort and collision safety layout requirements of the occupant space ergonomic layout are comprehensively considered, and the factors affecting the occupant protection of the passenger compartment layout space and interior design are reasonably controlled and managed. Compared with the B-class models of the same class, the Geely Emgrand EC7 has more sufficient front occupant layout space. The distance from the chest of the passenger to the center of the steering wheel is about 330mm, and the distance from the knee to the instrument panel is about 175mm. It plays an extremely important role in the protection of occupants in frontal offset collisions.
The side of the Emgrand EC7 model also has ample occupant layout space. Through design optimization, it ensures that during the door intrusion process, the occupant's abdomen, hip and other non-injury parts fully absorb the collision energy, thus effectively protecting the occupant's easy loss points. (such as the occupant ribs), improved the overall score of the occupants in the side impact and side column collision test. The design of the emperor EC7 door trim panel is relatively flat for the abdomen and hip position of the occupant. There is no excessive protrusion or depression, there is enough hip contact area, and the hip push block is arranged at the corresponding position of the occupant's hip. During the process, the door trim has a good pushing effect on the occupant's hip, which is beneficial to the side impact occupant protection. The door trim handrail does not interfere with the dummy ribs, which is beneficial to the protection of the dummy ribs. The shoulder of the dummy corresponds to the position of the waistline of the interior of the door. During the collision, the shoulder of the dummy first contacts the interior of the door to absorb part of the collision energy, and at the same time buffers the impact of the door intrusion on the rib portion of the dummy.
At the same time, the Emgrand EC7 model fully applies the pre-tightening force-limiting seat belt technology, through the continuous optimization of the belt preload and the limit force value, and the perfect match with the airbag, effectively reducing the damage of the occupant's chest during the collision. value. Considering that the Euro-NCAP evaluation procedure adopts the 64km/h frontal offset collision test condition, the collision test speed is higher and the collision energy is larger. Therefore, the Emgrand EC7 adopts a high-restriction-rated safety belt, which fully avoids the possible secondary contact between the occupant and the steering system components such as the steering wheel and the instrument panel during the collision process, and effectively protects the occupant through matching optimization with the airbag.
It is particularly worth mentioning that the whisky of the Geely Emgrand EC7 model (after touching the neck whiplash) scored 3.7 points, with a score of 0.3 points, which is the highest score in the history of Euro NCAP. According to Zhao Fuquan, vice president of Geely Group, when Geely learned that Euro NCAP had added the Whipalsh test in 2009, he immediately organized a bottoming test, but the score of the bottom test was zero. Because this technology belongs to the emerging passive safety technology in China, China's own brand auto manufacturers do not have any technical reserves and test experience.
In order to meet the safety requirements, Geely engineers also proposed cooperation intentions to foreign active headrest suppliers, but the other products are far higher than the price positioning of EC7. At that time, there was no supplier in China that could develop this technology. Even the international big-name enterprise Johnson Controls did not have this technology in China, and even 3 points did not dare to promise. In the absence of the door to the project, Geely engineers decided to conduct their own research. After many simulation analysis, original test data analysis and component test analysis, finally find out the most important factors affecting the protection of whiplash. Based on this, the partial design of the seat and the structure of the seat back were optimized, and the details of each detailed size and structural strength were input to the supplier, and then after repeated tests, the history of Euro NCAP was finally created. best result.
2, child protection
In terms of child protection, it is necessary to consider not only how to protect children in accidents, but also the strict assessment of Euro NCAP such as the convenience of child seat installation and vehicle description information. It can be said that this is not only a technology, but also a fine work. Especially in the dynamic development process, not only the strength of the child seat should be taken into consideration, but also the passive injury of the child that cannot be caused by the child's excessive restraint, which requires a lot of simulation and test verification.
Moreover, because the current requirements for child protection in domestic regulations are not strict, the adaptation to the development of the European standard is greater and the workload is higher. A large number of technical details in development must be fully considered, and these details are even subtle, including the readability of the logo - each label must have the language of the corresponding country, and so on. Therefore, child protection can be described as "the dummy is small, but the technical difficulty is not small." In the end, EC7 got 80% of the evaluation results in this item, and it performed well.
3. Pedestrian protection
The requirements of Euro NCAP for pedestrian protection are equally comprehensive and rigorous, not only considering the safety of adult pedestrians after being hit, but also paying attention to the situation where children with low self-control ability are hit. And this, the Emgrand EC7 is equally unambiguous. A detailed analysis of the children's head collision results of the Emgrand EC7, you can find that in the middle of the hood, the protection of the child's head is very good, each area has received a perfect score, the entire child's head collision scored 8 points . This is because Geely's engineers have fully optimized the space layout of the EC7 engine compartment, taking into account the key hard points (batteries, air filters, various liquid storage tanks, etc.) that may affect the head collision. These efforts ensure these hard points. An effective energy absorbing space is formed between the hood and the outer panel of the hood. As a result, the children's head collision performance of the Emgrand EC7 has even surpassed the Japanese models that have been leading the field in the field of pedestrian protection technology, such as Honda Civic and JAZZ.
In the calf crash test, the Emgrand EC7 scored 5.8 points, achieving the best protection for the pedestrian's calf with a score close to the full score (out of 6). The Euro NCAP pedestrian protection calf collision was evaluated by three indicators: tibia acceleration, knee shear displacement, and knee bending angle. Each value of the above indicators needs to meet the Euro NCAP standard in order to obtain the corresponding score, so the development difficulty can be imagined.
Geely's engineers realized the protection of pedestrians' calves by adopting the special support structure for pedestrian protection and the front beam energy absorbing plate structure. The application of the lower support ensures that the knee bending angle of the pedestrian's lower leg is reduced to a minimum, and the front beam energy absorbing plate can effectively absorb the impact energy during the collision of the lower leg, reduce the acceleration of the tibia and the knee shear displacement, and finally realize the pedestrian. Effective protection of the calf.
4, security assistance
In terms of safety assistance, from the results of previous releases, the Geely Emgrand EC7 even reached the safety level of luxury cars. In the Euro NCAP, the EC7's score in the safety aid is only one point lower than the full score, and has reached the European 5-star standard. This indicates that Geely has continuously made new breakthroughs in passive safety while developing active safety technology. The same has also created a new benchmark for independent brands. The EC7 is equipped with an auxiliary safety system such as ESC (Electronic Stability Control), ASLD (Vehicle Safe Travel Speed ​​Limit Control), and SBR (Vehicle Seat Belt Use Reminder). In the 14 models of Euro NCAP's current results, as shown in the blue box in Figure 2, the Emgrand EC7 has the highest score of 86% with several cars such as Mercedes-Benz and Volkswagen, compared to the Jaguar Jaguar XF. Jeep Grand Cherokee, MG6 and so on scored 71%, while Fiat Panda only got 43%. It is important to know that Euro NCAP's evaluation of safety aids is also very strict, not only requires that there must be a corresponding configuration, but this configuration must be tested to prove that it meets European standards and is effective.
5. Subjective evaluation
In addition to the quantifiable evaluations mentioned above, Euro NCAP has a very harsh subjective assessment. These subjective evaluations often require very experienced engineers to grasp, and it is a great challenge for a young team like Geely, and a challenge that has never been experienced before. Whether the part of the floor is torn, whether the brightness of the indicator light reaches a visually acceptable range, whether the sound of the alarm is large enough, etc., must be tested under the subjective evaluation of the "microscope"! However, this is exactly Euro. The authoritative nature of NCAP, for this reason, is more fully proof of the authenticity of the Emgrand EC74 star results.
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