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Unveil the mystery of domestic automobile brands and take you to Xushui science and Technology Festi

Great Wall Motors has been keeping a low profile since the disappearance of the Haval H8, which has suffered countless fans of Great Wall Motors. In September, the Great Wall Harvey Xushui factory has finally made a new move. A new Great Wall Science and Technology Festival is held again. Today's editor will take you into the Xushui science and technology festival to reveal the secrets of the famous domestic automobile brands.

In late September, Great Wall Motors held the annual Great Wall Science and technology festival in its Harvey branch of Xushui. Since 2011, at this time of every year, great wall almost always presents all its own technical reserves to meet with you, so as to show its strength in technology research and development. This year, the Great Wall Science and technology festival has gone through four years, and the scale of the exhibition is growing day by day. However, the two events with great contrast, namely, haver H6 continues to take the lead in the domestic SUV market and H8 has been "reboiled" for two times. We have some doubts about the Great Wall, which started with SUV and focuses almost entirely on SUV products: is the Great Wall "out of talent" and whether it has enough technical reserves ? is there any selling point for products after H6? I hope this technology exhibition can give us some answers or inspirations.

After its appearance as a concept car in 2014 Beijing auto show, Harvard coupe C has attracted the attention of many Harvard brand supporters. The latest news shows that this car will eventually be named Harvard H6 coupe. As a more personalized brother model of H6 currently on sale, haver has carefully designed its body structure. Among them, the use of high-strength steel makes coupe C not only ensure the structural safety, but also make it more lightweight.

As consumers pay more and more attention to the passive safety performance of vehicles, more and more attention has been paid to the body structure design of independent vehicle enterprises. However, whether the body structure design is reasonable still needs to be verified by collision test.

-Pedestrian protection structure

In terms of safety, the Great Wall shows the latest equipment in passive safety configuration and pedestrian protection. In terms of pedestrian protection, the Great Wall shows its latest body structure designed to reduce pedestrian injury in collision accidents. Such design also follows the trend of vehicle safety design.

-Roof airbags for rear passenger protection

In order to further improve the safety of the rear passengers in the accident, Great Wall shows a new type of air bag equipped with the haver H9. According to great wall, this kind of airbag can effectively improve the safety factor of the second row passengers in forward collision accidents.

Although some passive safety technologies have been demonstrated, great wall has not disclosed much about the high-tech active safety technology such as ADAS (Advanced Driver assistance system). At present, the mainstream safety rating agencies in the world are about to or have added this content into the safety evaluation. If we want to meet the higher safety standards at home and abroad in the future, Great Wall still needs to take it out A set of mature and feasible solutions.

Electric / hybrid technology

-C20rev electric vehicle

In the new exhibition area of the exhibition, there is a great wall c20r which does not look very special. However, from the perspective of the body pull, it is obviously not an ordinary c20r, but a pure electric car c20rev. A permanent magnet synchronous AC motor with maximum power of 109ps (80kW) and maximum torque of 260n & middot; m is used to drive the front axle through a single stage reducer, which can achieve a maximum speed of 160km / h and a range of 160km / h.

-Haver 4WD hybrid platform

Under the background of the current favorable policy of electric / hybrid electric vehicles, Great Wall will naturally have relevant technical reserves. The haver four-wheel drive hybrid platform, which was released in 2013, is one of them. However, this hybrid platform for huff SUV has not been mass produced since its debut, which also makes us feel some regret.

Compared with the great enthusiasm of major domestic brands for electric / hybrid technology investment at the present stage, great wall seems a bit slow in this respect, and has not launched a large number of electric / hybrid models to seize the market opportunity. However, with the launch of c20rev in the future and the mass production of SUV hybrid technology, I believe great wall will not be willing to be a spectator in the electric vehicle market.

Traditional power system technology

-1.0T three cylinder engine

In the power system exhibition area, great wall exhibits some overall and technical models of engines and gearboxes. Among them, the 3.0T in-line six cylinder turbocharged engine (click to view) and diesel engines, which have been published for many years and will be installed on H8 and H9 models. The 1.0T three cylinder gasoline engine is our most concerned. Although this is not the first time that this "little guy" has appeared, it has been in the state of "half covered" before. Under the current motor vehicle tax policy, this "public upgraded" three cylinder small displacement turbine engine has become a new hot spot in the research and development of major automobile enterprises.

-2.0T four cylinder engine + 6dct double clutch transmission

We are no stranger to the Great Wall's 2.0T direct injection engine. The improved Haval H8, which was briefly unveiled and 'recycled', is equipped with this engine. We also see this four cylinder turbocharged engine on the trial assembly of the soon to be launched Haval H9. At this science and technology festival, Great Wall demonstrated its combination with 6-speed wet dual clutch transmission, which was also proved to be one of the power options for the future H6 coupe (the mass production version of Coupe C concept car).

-Integrated engine exhaust manifold

The integrated exhaust manifold can be regarded as a popular engine structure at present. Because the manifold structure is integrated in the cylinder head, it puts forward higher requirements for casting technology and material application level. The integrated exhaust manifold design can improve the exhaust back pressure, so that the engine can get better low torque response. At the same time, for the turbocharged engine, the distance between the turbocharger and the cylinder is closer, and the shorter gas path also helps to improve the reaction sensitivity of the turbine. In addition, the exhaust manifold integrated in the cylinder head has the advantage of increasing the engine speed in winter. At present, the common engines using this technology are Volkswagen ea211 1.4TSI engine and 1.4t/1.5l Sidi ECOTEC engine adopted by Chevrolet New Cruz.

-Engineering plastic camshaft gear

In order to improve the NVH level of DOHC (double overhead camshaft) structure engine during operation, and further lightweight design of the engine, Great Wall exhibited a camshaft gear made of Peek (polyetheretherketone) engineering plastic material. Compared with the traditional metal gear, the gear can reduce the meshing noise by about 1.5-3db, and weigh 70% less than the metal gear. In terms of durability, it can meet the working conditions from - 40 ℃ to 150 ℃.

It can be said that great wall did not adopt the "great leap forward" strategy in terms of power system technology, and it is also good at using mature products of international advanced spare parts enterprises for matching and integration. However, in terms of the launch and application of new products, it is a bit slow compared with other independent automobile enterprises. When are some technologies such as integrated exhaust manifold and lightweight camshaft gear It can enter the practical application stage, which is still unknown.

Editor's summary:

Compared with other independent auto companies that prefer to make news, great wall seems a little reticent. However, as the "number one" in the domestic SUV market, the Great Wall will still become the focus of attention when the H8 "comeback" event occurs. Although the Great Wall has made an official explanation, there are still a lot of speculation and reverie over time.

The automobile production system is actually a very complex ecosystem with clear division of labor. It is impossible for vehicle enterprises to complete the R & D and production of all parts. Therefore, it is very common and normal to rely on upstream suppliers and even the world's parts giants. We can see that great wall relies on many well-known parts manufacturers at home and abroad to carry out technology development and parts supply, which undoubtedly provides a strong technical guarantee for great wall. However, in this science and technology festival, we did not see the continental air suspension which had been exhibited before. I wonder if the huff H8 will continue to provide this option when it is re installed in the future.

By sorting out the exhibition contents of the Great Wall Science and technology festival, we can see that the Great Wall still has some technical reserves that can be quickly transformed into products. Among them, the small displacement three cylinder turbocharged engine, mature body structure, pedestrian protection and lightweight technology which will be applied to small SUV models all show that great wall haver still has a solid foundation in the field of SUV technology; In the field of electric vehicles, where independent brands are trying to land on the beach and take advantage of the opportunity to overtake on the curve, great wall has also come up with relatively mature solutions. It is believed that these technical reserves will help great wall haver continue to 'lead' in the SUV market in the future, but the pace of catching up with other independent brands will be closer and closer.