Research Of Automatic Test Technique In Electronic-Controlled Injector Characteristics Test System

Electronic controlled injector is the most important component in the gasoline electronic fuel injection system, which has great influents on the engine economic, dynamical and emission performance. The performance of injector is an important factor which can determine the electronic control system designing and affect the accuracy of fuel electronic unit directly. To further study the technology of gasoline electronic control and develop the injector, it is necessary to research and develop the equipment for evaluating and testing the characteristics of injector.In this thesis, the application prospect and the development of the electronic control system were introduced. The superiority of the electronic fuel injection system is analyzed. The automatic test technique in electronic-controlled injector characteristics test dais is also designed and built. The hardware and software design is discussed in detail in this dissertation. The automatic test technique in electronic-controlled injector characteristics test system is designed and advanced on this basis. The test surface, electronic control unit and the weighing system are included. Data inspecting, saving, exporting data real-timely can be realized by communicating with ECU via RS-232C serial interface. Analyzing data, obtaining the best work nodes and drawing the static and dynamic state flow curves can also be realized by this system.Taking two injectors used on the ALTO cars and the motorcycle (for experiment) as an example, the test data gained in the whole flow range have been analyzed and summarized in order to educe some important flow characteristics parameters, such as the static and dynamic state flow curves.The test results show that this test system has good stability and reliability, which can test some important characteristic parameters. In the meanwhile, the automatically operating ability is great advanced by the design of the test surface and electronic control system. The exploitation and research system supply a favorable test platform for the electronic controlled injectors.