Yesterday, Hangzhou Gear Group officially announced that the research and development of the dual clutch mechanical automatic transmission, which was included in the “Eleventh Five-Year†National High Technology Research and Development Program (863 Program), officially began. It is expected that the prototype will be available before the end of 2008.
In the project approval, the Ministry of Science and Technology pointed out that through the development of advanced automotive technology research, the automobile development technology innovation system was initially established to meet the growing demand of the domestic market and the ability to export in large quantities, to promote the leap-forward development of China's automobile industry and enhance China's autonomy. Development capabilities and international competitiveness.
Only a few countries have mastered DCT technology
The dual clutch mechanical automatic transmission, abbreviated as DCT in English, is a hot spot in the field of international automatic transmission technology. In 2003, Volkswagen AG and BorgWarner jointly developed the world's first DCT prototype. In 2006, the Ford Motor Company of the United States and the German company Geithrag developed a successful dual-clutch automatic transmission. According to the latest information, Ford will introduce another fully automatic dual clutch automatic transmission later this year.
According to the data of the Ministry of Science and Technology, by May last year, there were more than 130 patents related to DCT in foreign countries. In addition to Germany and the United States, Japan and South Korea also have patents on DCT, but they do not have fully autonomous machine technology. Hangzhou Dental Intervention Research and Development Leads in China
In China, Jilin University first carried out DCT research work. In 2002, Jilin University cooperated with Hangweike Company, a subsidiary of Hangzhou Gear Group, to develop the car DCT. Feng Jianrong, general manager of Hangweike, said that the development of DCT is our dream.
The dream finally got a certain harvest in a few years. Significant progress has been made in the design of the transmission structure and the dual clutch assembly, and important research results have been achieved in the development of DCT transmission system simulation and electronic control systems.
DCT technology is still in its infancy
Feng Jianrong, head of the DCT project, said that most of the DCT technology patents were applied after 2000. From this, we can not make such a conclusion. This shows that the research of DCT technology is an emerging research direction in the advanced transmission technology of automobiles. As far as the current research and development in various countries is concerned, a relatively complete automatic control theory of DCT has not yet been formed, especially in terms of control objectives and control strategies, and a perfect theoretical system has not been formed.
According to a document from the Ministry of Science and Technology, by 2011, the proportion of DCT products in the world in various transmission products is 20% in Europe, 3% in North America, and 4% in Japan.
R&D content multi-tasking
The DCT research and development tasks issued by the "863 Program" include many researches on DCT automatic shift theory, modeling and simulation technology, prototype prototype development, control system development, control system software development, experimental research, and DCT productization technology.
Feng Jianrong said that in fact, these contents are interlocking. Without theoretical research, the prototype prototype has become a passive water. With the "take" method to create a prototype, it loses its own innovation and loses its autonomy. Intellectual property. In fact, in these R&D content, the development of control systems and their software is very important. The quality of the control system determines the quality of the automatic transmission. Feng Jianrong briefly explained the importance of the control system. He said that DCT combines two manual transmissions with one, three, five and two, four and six gears into one transmission. The two transmissions are respectively connected to the engine to transmit the power transmitted from the engine to the car wheel. When changing from first gear to second gear, the other transmission has accepted the work command and automatically starts working before one of the transmissions has stopped working. This is not like manual operation, relying on the driver to step on the clutch shift. The difficulty of DCT is to achieve power without interruption.
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