Study And Development On Self-Study Of Electronic Pneumatics Shift System Of Bus

With the development of modern society and the improvement of living standards, the automobile industry has been developed fleetly, and people demand more about the functions and capabilities of vehicles. In this case, EPS system has been developed. The system takes the ECU as the control kernel and utilizes the method of the Electronic Pneumatic Shift to complete the prospective shift operation. With the EPS system is widely applied to different bus transmission, as different synchronizers of transmission have different models and parameters causing synchronization time is too long or have synchronized shocks, and the result of these phenomenon is the increase of sliding friction time or shift shock, thus affecting the performance of shift. Using the research experience for reference in home and abroad, and according to our national actual situation, we developed the Self Control Electronic Pneumatic Shift System which has a good cost performance ratio.Based on the original EPS system, the system is redesigned and is replaced by the Self-Study electronic transmission. The new system is based on the original control and executing agencies, new hardware is added to the hardware control system, in this article C51 corresponding software is developed for the self-study control system based on the Phase approximation, and made the control system achieved self-study.This thesis introduces the history, current situation and developing trend of the auto industry, then the blue print of whole system with the structural design of the control and work principle expounded then shift processes are discussed in details. Aiming at the adaptability of the EPS system and based on the study of several traditional control methods, an on-line, real-time self-study control system was put forward, then the blue print of whole system with the structural design of the control was expounded and also its hardware circuit design and the frame of the communication protocol was expound. Finally the hardware and software are tested to make sure the whole system can work smoothly.