Study On Measure System For Motorcycle Engine Valve Phase And Compression Ratio

According to the "motorcycle valve phase and compression ratio measure" project, offered by Chongqing Jialing Industrial Group, we studied and found the Measure System For Motorcycle engine valve phase and compression ratio. This paper is divided into six parts: introduction, work principle, holistic design, hardware design, software design, and error analysis.The first part points out that the generic measure method has following disadvantages: complicated operation and lower precision. The second part offers the mending method based on analyzing the changing-gas procession, valve structure and transmitting capability.The part introduces the generic concept of system project holistic design, and designs the hardware and software system based on its rules, collects and compares the displacement signals of supply valve, exhaust valve and crank by using raster displacement coder and photoelectric angle coder, finds out the relevant relation, exactly measures the parameters of valve phase, and also explains why use the liquid measure in our design.The fourth part introduces how to choose the hardware and find the hardware structure based on measure method. According to clamp design principle, designs the clamps using in the system, offers the clamps and the sketch maps of hardware fixing.The fifth part introduces the principle of OOP. According to the process of UML, founds the system model and Analyzes the important use case,the process of type events, program with visual basic and lists the operational steps of this software.The sixth part introduces the origin of various errors and the methods to reduce or eliminate them, Detailed analyze the errors potentially appearing in the system and offers the methods that can reduce or even eliminate them through the error origin.This system has run well a year and an half in Chongqing Jialing Industrial Group, simple operation, convenient fixing and upper precision. It can be very valuable for the personnel who engage in quality control of motorcycle engine.