Test For Leakage And Venting Of The Automobile's Fuel System

With the awareness of environmental standard enhanced, people gradually recognize the importance of the exhaust emission, and the government raised the standard of the exhaust emission. To comply with the standard of the emission of pollutant (70/220/eec), it's necessary to do the online test for leakage and venting of the fuel system during the inspection of conformity of production. In the domestic, The equipments for testing leakage and venting of the fuel system are different, manufactories design and make the expert equipments for testing their own automobile. The hardware and the method of measuring, the standard of the enterprise of the equipments are different, They have excellences ,but have disadvantages too.Due to the concrete conditions of the automobile's fuel system, a measure and control system based on industrial PC and programmable controller is proposed is this thesis, and use high accuracy and short scope sensor to measure pressure. Applying Industrial configuration software technology to the software design of measure and control system, the host software of measure and control system is developed based on the kingview 6.5, domestic configuration software platform. The application of the configuration software reduces the developing period, improves the flexibility and reliability of the software.