In order to calculate the cooperating characteristic of engine and hydrodynamic torque converter stably and accurately, obtain the best matching of hydrodynamic machine, based on the best matching principles of dynamic and economy, a kind of numerical computational method was put forward. Accuracy of intersection point calculation could be controlled by set step size of torque and rotational speed. The problem of multiple roots and instability of intersection point calculation could be avoided. Based on the graphical user interface (GUI) of MATLAB, the program was completed for matching and the graphs were plotted automatically. By this method, any hydrodynamic torque converter and engine with given performance, input and output cooperating characteristic could be derived accurately, rapidly and stably.

The detection method of automotive controller area network bus is studied in this paper. The composition of detection system is introduced. By analyzing and processing the data of CAN bus and sensors, work condition of automotive is achieved. Multi-pattern data fusion model and algorithm for failure diagnosis is researched. The detection system designed in this paper can be applied to automotive fault analysis, troubleshooting and maintenance.

In order to meet the design requirements, the wet shifting clutch was designed based on secondary development of Pro/E. The basic principle of parametric design and the system composition of Pro/Toolkit application program were introduced. The three-dimensional template of wet shifting clutch was established. The VC++6.0 programming platform was utilized. The application program interface was set up by using the synchronous mode of Pro/Toolkit. The regeneration of wet shifting clutch was completed. The parametric design about the key sizes in the key parts and assembly relationship of the wet shifting clutch were realized. The convenient design of wet shifting clutch was achieved. The effective method could be provided for the parametric design of other complex parts.

Vehicle dynamic safety warning system based on data fusion is researched and designed in this paper. Dynamic information of vehicle, road and environment can be collected in real time. By analyzing and processing these data, active safety warning information is achieved for individual vehicle on different work condition. Safety parameters of vehicle and road condition are detected. Warning information is transferred by wireless network in real time. Research work in this paper is applied to road traffic control area. This vehicle warning system is of value to removing incipient fault of running vehicle, improving reliability, rational maintaining and proper inspection.