Exploitation And Research On Gasoline Engine Electronic-controlled Injector 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.This paper analyzes the injection's dynamic process of injector and researches theoretically in the injector working elements. Electric current characteristics in driving circuit and core-pipe assemble motion characteristics are also analyzed. It offers some academic bases to the exploitation of flow characteristics test of gasoline injector.It also designed and built flow and atomization characteristics test dais and electronic control unit which can detect the system test state. In addition, a convenient software is exploitated for this test system, which provide a simple operation environment to the handler.Taking a high resistance injector 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. Besides, different voltages and fuel pressures working on flow characteristics are compared and compensating measures have been provided. It also gets some modificatory curves. During test, the atomization characteristics is also tested and analyzed. The spray angle and distribution have been analyzed and obtained by experimentation in this system. The spray angle is figured out through the design principle.The test results show that this test system has good stability and reliability, which can test some important characteristic parameters. In the meanwhile, theautomatically operating ability is great advanced by the design of electronic control system. The exploitation and research of this test system supply a favorable test platform for the gasoline injectors.