The Design Of Electronic Pneumatic Shift Control System For Vehicle And The Control Machine Based On Wireless Communication

At present, most city buses adopt the postposition engine and manual mechanical transmission. The distances between the public traffic depots are about 500m, furthermore, in the centre of the city, the distances are much more shorter. Within such short distance, drivers must do the manipulation of start, gearshift and stop again and again. The working intensity is very large. As for the passengers, they must suffer from the recoil and swoop. By adopting the electronic transmission, the fuel economy, power and emission control can be improved. Based on the manual gear box, adopting electronic technology and control theories, and grounding on ECU, the system implements the shift operation by the pneumatic actuators. As far as the situation of our country is concerned, to replace the manual gear box by the electronic transmission is prone to the manufacturer, facile to production, and high performance-price proportion.The thesis introduces the history, actuality and development trend of the automatic transmission .And it also expounds the components of the electronic transmission, including the shift parts and the executors. It has discussed the shift quality, by using jerk, friction-work and gear-shift time to evaluate. The research of electronic control and pneumatic transmission belongs to the field of advanced manufacture and automation technology .Moreover, the design of circuits and software of electronic control are made. It choose the microcomputer W78E58B and designs not only the electric circuits of expand but also software according to the demand of the system. Wireless communication is introduced to transmit data between the system controller and the actuator, which simplified the transmission wires, enhanced system reliability and saved installation space of wire harness and system cost at the same time. Because vehicle always works on complicated circumstance, the technique of anti-jamming and dependability is designed and analyzed. According to the introductions hereinbefore, the research of this topic has the theories and the application values.