At present, with the rapid development of automobile industry, enterprises have developed a platform / architecture that can provide multi vehicle co production in order to reduce R & D costs. For example, MQB of Volkswagen, tnga of Toyota, CMA of Geely / Volvo, etc. As an old brand automobile enterprise in China, Great Wall Motor’s latest lemon platform has attracted much attention. At present, it is known that the brand-new Haval H6, Havel big dog and Euler good cat are all built on this platform. < p > < p > on September 23, Great Wall Motors took the opportunity of “Great Wall of science and technology” series open courses to deeply analyze the core technology of “Great Wall · lemon” for the public. < p > < p > according to the introduction, lemon platform is specially built for SUV, sedan and MPV models. It can produce A0 to D-class models with wheelbase range of 2650 mm-300 mm, vehicle length range of 4200 mm-5100 mm and model range of 1830-1975 mm. < p > < p > lemon platform can not only produce a variety of levels and positioning models, but also provide a very comprehensive range of power types, including fuel, hybrid, pure electric and hydrogen energy. < p > < p > the official also said that the thermal efficiency of the conventional and hybrid engines could reach 41% and 42% respectively in 2022, and the thermal efficiency would increase to 51.5% in 2025. The transmission has a 9-speed wet dual clutch transmission. < / P > < p > in addition, the latest DHT hybrid architecture can meet the fuel economy requirements of urban roads, and the fuel saving rate in urban areas can reach 48-50% compared with conventional vehicles. < / P > < p > in terms of vehicle architecture, the utilization rate of high-strength steel will reach 77% in the future, and it will be equipped with 10 airbags, which will meet the most stringent Collision Regulations in China, Europe and North America. < / P > < p > at present, the brand-new Haval H6 based on lemon platform has been launched at the end of August, equipped with 1.5T + 7dct power, and the price range is 115900-134900. And the huffy dog, which was also born on the platform, will be officially launched on September 25. Spontaneous combustion at a Guangzhou Motor vehicle intersection and other traffic lights in Shenzhen