The Design And Analysis Of Electronic Control System And Test Rig For Single-cylinder Motorcycle Engine

Motorcycle industry in China has been developing rapidly, The number of production and sales for motorcycle rises year by year. The motorcycle industry is facing with huge pressure because new effluent standard of motorcycle have been put into effect. Factual proof EFI is the only effective way to satisfy the new effluent standard.A certain single-cylinder gasoline engine for motorcycle is regarded as research object to design its EMS.The main research work in this paper are as follows:1) Determine the overall plan of electronic control system. Closed-loop control and Three Way Catalysts technology have been adopted. The air measurement is used the arithmetic of n; The inlet injection and no return fuel are used in the supplying system; Ignition mode is ECU-CDI. All the sensors and actuators are made in China, The control system is simple in structure, convenient in installation and reliable. On the whole, It is very suitable for motorcycle engine.2) Design the hardware and software of ECU. According to the practical demands ECU hardware circuit and the corresponding software has been designed independently, the result shows that ECU is reliable and stable enough to be used as production.3) Improve the control strategy and calibration experiment. The paper analyze and design the control strategy on the air-fuel ratio, injection, ignition, idle speed control and safety protection. The calibration experiments which are including the basic injection and ignition MAP and all the verify form for injection have been completed through the engine test bed which is built by ourselves and the calibration software which is developed independently. Finally the full-load performance curve of the engine assembled with EMS which is developed ourselves is tested and make a comparison with the carburetor engine performance.