Establishment of theory system of automatic transmission control for automobile and the key technologies of product development
Source: This web site Publish date: 2015-10-28 10:25:00
The automatic transmission equipped in domestic automobile relies mostly on import or the Chinese-foreign joint ventures, correspondingly these core technologies for the transmission are mastered in Germany, America, Japan and other developed countries. It is necessary for the development of our country automobile industry to independently develop the automatic transmission that can meet the domestic automobile usage requirements.
Based on present situation, this achievement proposes the automatic transmission control system for the automobile and the key technologies of product development in order to promote our country automobile industry development. This method in the achievement can flexibly design the automatic transmission according to the structure of the existing manual transmission, which promotes the upgrade of manual transmission to automatic transmission and protects the production equipment investment of existing manual transmission. It is observed that this method has the good production inheritance and is suitable for our national situation.
Currently, shift control strategy can be summarized as four types, which are based on the empirical, based on the constraint conditions, intelligent modify and collective intelligence. This achievement presents and improves the design method of shift control strategy that based on the constraint conditions, which promotes the accuracy of transmission model and makes the automobile achieve the optimal fuel economy during a specific working cycle. At the same time, this achievement qualitatively and quantitatively analyzes the effect of feedback control, the basic composition principle of automatic control system, the main factors that affecting the accuracy of system and the basic thinking of building high-precision control system are illuminated. On the basis of establishing complete control system for the automatic transmission, this achievement also formulates the whole development process, test criteria and technical manual of the automatic transmission for the automobile. Besides, the new gear transmission system is developed, which is high strength and efficiency.
At present, the institute has equipped with the multifunctional test-bed for automatic transmission through combining the shift control strategy with the development technology of TCU soft-hardware system. Furthermore, the dynamic shifting process for the automatic transmission is simulated and analyzed by building simulation platform, meanwhile the optimization results are also verified. The success of research on this system and key technologies breaks through the limitation of the control technology for the domestic automatic transmission and the monopoly of similar foreign products, reduces the cost of the product manufacturing, enhances the self-development ability for domestic brand enterprises, and promotes the market competitiveness of enterprises and products.
In addition, through the product development and the technical research of key parts, this achievement not only enhances the manufacturing capability of domestic automatic transmission and improves the related system for automatic transmission parts, but also cultivates a large number of scientific research talent, which lays a solid foundation for the development and technology improvement of similar products in the future.