China's most popular autonomous automatic transmis

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China's autonomous automatic transmission industry needs to be driven by interests

China's autonomous automatic transmission industry needs to be driven by interests

information on China's construction machinery

Guide: on July 20, domestic and foreign elites from the automatic transmission industry, a key weak link in China's automotive industry chain and the field with the most development potential, gathered in Chongqing, and participated in the conference sponsored by Beijing beichi Co., Ltd. and Chongqing Landai Power Transmission Machinery Co., Ltd, Co organized by Chongqing University and Chongqing University of Technology

on July 20, the key weak link in China's automobile industry chain and the most potential field - the domestic and foreign elites of the automatic transmission industry gathered in Chongqing to participate in the conference sponsored by Beijing beichi Co., Ltd. and Chongqing Landai Power Transmission Machinery Co., Ltd., CO organized by Chongqing University and Chongqing University of technology, Beijing University of technology, Beijing University of Aeronautics and Astronautics "2012 China International Symposium on automotive automatic transmission industrialization" with technical support from China Automotive Engineering Research Institute

as a highly professional national conference of China gear industry alliance, this seminar was held under the background that China's automobile industry is in a high position and the independent brand automobile automatic transmission is in the primary stage of industrialization development. The participants offered suggestions for the Chinese people's own automatic transmission industrialization from different angles, and conducted exchanges and discussions for the future development of China's automatic transmission industry

clear direction of industrialization

in view of the importance of automobile assembly, in recent years, 8.2 lime sand bricks with a new generation of engine as the medium in China should be stored for 3 days before leaving the factory, and the products should be stored and stacked in an untidy place, graded and graded, neat and stable R & D and production have been in full swing for many years. Due to the requirements of the policy and the market for fuel economy, as well as the consumers' requirements for automobile comfort With the continuous improvement of handling safety requirements, automatic transmission technology has developed from the industrialization incubation period characterized by R & D and trial production for many years to the moment when it is about to be fully put into flower

different from the engine, which is the "heart" of the automobile, the engine is continuously improved and upgraded on the basis of the existing industry, but the automatic transmission has almost no industrialization foundation in China. Except for some mechanical components of AMT and DCT, which are closely related to the manual transmission, many other core technologies and key components are basically blank. On the basis of decades of industrialization of others, especially in the market environment where most of the vehicles on which they are equipped have been used for different purposes, it is conceivable that it is difficult for independent brand automatic transmissions to squeeze into a market space

it can be seen from the relevant industrial policies of the state in recent years that automatic transmission is an industrial project to be developed by the state at present and for a long time in the future. For example, the notice on how to avoid and solve the existing problems in the implementation plan for the revitalization of the mechanical basic parts industry issued by the Ministry of industry and information technology in October 2010 pointed out that the key task of the implementation plan for the revitalization of the industry is the automobile energy-saving automatic transmission and its key parts supporting high-end cars and heavy-duty trucks; In the outline of the 12th Five Year Plan for the development of China's gear industry and the investment direction for the technological progress and technological transformation of the automotive industry (2010), it is also clearly pointed out that the automatic transmission assembly and its key parts that meet the requirements of energy conservation, environmental protection and new energy vehicles, as well as the electric drive transmission system, the special power coupling and transmission device for hybrid electric vehicles, are the focus of the future development and investment of the automotive and gear industries. In the development plan for energy saving and new energy automobile industry (2012-2020), which was reviewed and approved by the State Council in April this year, the application of new products and technologies, including automotive automatic transmissions, was also included in the plan

during the seminar, Li Shengqi, Secretary General of China gear Association, learned that although independent automatic transmission manufacturers are facing various difficulties in their development, the direction of industrial development is clear and consistent with the requirements of relevant national industrial policies. In the future, the construction of common technology platform and the mutually beneficial development between upstream and downstream enterprises of independent brand industrial chain are the key to the industrialization of China's automatic transmission

there are still opportunities for independent technology.

in 1908, the planetary gear type 2-speed semi-automatic transmission developed by Ford Motor Company was born in the world. In 1960, Chrysler completed the true hydraulic torque converter type 3-speed full-automatic transmission. In the broad picture of the development of automatic transmission technology, after more than a hundred years of development history, with the continuous improvement of people's requirements for vehicle comfort, energy saving and safety, the four major technical schools formed by at, CVT, DCT and am Zhaoxia T, deputy director of the Hejin industrial and mining coordination office in Yuncheng City, are also constantly undergoing new technological evolution driven by continuous innovation. Professor xuxiangyang, deputy dean of School of transportation science and engineering, Beijing University of Aeronautics and Astronautics, introduced at the seminar that ZF 9at products representing the latest at level, jatco cvt8 products representing the latest CVT level, and FEV's newly developed 10 gear DCT products with dual clutch interconnection are all moving towards the direction of increasing the number of gears, increasing the speed ratio range of the transmission and continuously optimizing the functions

at this seminar, two new power transmission schemes representing Chinese power, the new hybrid power transmission device of Tianjin Sino German transmission and the mechanical continuously variable transmission (em-cvt) of Shenyang yueshida, attracted widespread attention of the participants. Although the latest foreign technologies have almost achieved the acme of multi speed, energy saving and comfort, the Chinese have found the key point of technological breakthrough in the gap between several technical schools. One of them applies five corresponding driving modes to adapt to various operating conditions of hybrid electric buses, and the other uses the mechanical form that the Chinese are good at to replace the traditional CVT Hydraulic mode, Therefore, the application of automatic transmission in the field of energy-saving and new energy vehicles has been realized concretely

in addition to the above two new transmission system schemes and technologies, it was found that the manufacturing process and equipment of automatic transmission planetary row, the manufacturing of automatic transmission hydraulic actuator, the precision forming process of automatic transmission parts, and the research on transmission oil technology, as well as some manufacturing and application technologies involving key parts and components, were discussed in this seminar. In addition, the rack type continuously variable transmission technology and the movable tooth continuously variable transmission technology, which have been well known in the industry, included in the anthology of this seminar, can be said to represent the embodiment of independent technology in the field of automatic transmission. If we take time and find appropriate financial support, the gradually mature autonomous automatic transmission technology should also make a difference on the road of industrialization

Chinese people should dare to do calibration by themselves

in this seminar, it was found that since there are not many practices of new technologies of autonomous transmission, there are not many test technologies discussed in previous seminars. This time, it was not only mentioned many times, but also placed in a very important position

the collection and research of load spectrum with Chinese road characteristics and the establishment of simulated load spectrum are the basis of key common technologies that many people in the industry have been calling for. Professor shixiaohui, President of Chongqing University of technology, has done a lot of work for domestic independent brand manufacturers in many test and detection fields, such as automatic transmission road simulation test, control mechanism test, clutch test, NVH test, through their efforts in the field of automatic transmission test and detection technology in recent years. The multi-function test bench of automobile transmission system, automobile hybrid power matching test bench, DCT comprehensive performance test bench, AMT special test bench, NVH test bench, clutch performance test bench, etc. developed by them have also played a role in the research and application of Chery Automobile, Chang'an Automobile, Chongqing Qingshan transmission, Hubei Jiangshan transmission and other domestic manufacturers and several universities

lixuelong, vice president of the Automobile Research Institute of Lifan Group, even more from his practice of matching and calibrating domestic CVT with Lifan automobile, issued the call that "if you can't be independent in calibration, you still have to be controlled in the development of automatic transmission"

this practical engineer, who claimed to be "a little educated auto repairman and auto driver", participated in the development, calibration and matching of Lifan CVT models throughout the process. The "critical speed calibration method" summarized by lixuelong through personal practice is to calibrate the corresponding overall dynamic performance and economic operation mode of the vehicle within the area composed of the maximum transmission ratio and the minimum transmission ratio by using the critical speed point corresponding to each working condition of the whole vehicle system, engine and transmission. His calibration method is similar in theory to the principle of brake dissipation power used by Professor Songjian of Tsinghua University for AMT calibration

although the calibration theory is not necessarily rigorous and the calibration method does not necessarily consider all working conditions, as a simple and fast practical calibration method, the same powertrain platform can be applied to another completely different vehicle within a few minutes. Compared with the asking price of large foreign companies that "it takes 5 vehicles, 1million euros and 18 months to calibrate a vehicle", It can be said that the two most important problems of Chinese people's confidence in automatic transmission calibration and cost have been solved first

industrialization requires the pursuit and coordination of the interests of all parties.

automatic transmission has always been a must for strategists in the automobile industry. Many experts present at the meeting said that it is expected that the situation of self owned brand automatic transmission will be greatly improved in the next five years, and the domestic automatic transmission industry will form a considerable scale by 2015. Lu Chao, vice president of China gear industry alliance, said that in the next five years, China's auto automatic transmission will enter a golden period of rapid growth with an average annual growth rate of 38%. By 2015, the annual demand will reach 12million units, and the proportion of automatic transmission will increase from the current 38% to more than 46%. The remarkable characteristics of China's automobile market entering the rational adjustment period are large base, small growth, mature market and reasonable structure. These characteristics determine that the competition in China's automobile market in the future will inevitably be the localization and international competition of brand and core technology, and the automatic transmission will be one of the most intense focuses in this round of competition

in the face of the fact that China's auto transmission imports still account for a considerable number, Volkswagen, general motors and other vehicle enterprises, as well as transmission enterprises such as Aisin, gattek and bunch, control the real process of the domestic industry and are still expanding continuously, how a small number of independent brand auto transmission manufacturers can survive and grow in the most critical market introduction period of industrialization does not just depend on the construction of key common technology platforms The alliance of manufacturers, or even some administrative instructions, can be solved immediately. The success of industrialization requires the investment of real money and real user relations. This is extremely important not only for the independent brand automatic transmission manufacturers themselves, but also for their OEMs users and major suppliers

in fact, whether it is to develop new transmission with unique structure in another way, or to industrialize according to the existing technology or the imported technology, what China's gear and transmission industry needs is stepping

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