Flow characteristics and dynamic response measuring system for electronic controlled injectors
                                     TANG Chao1, ZHANG Zhen dong1, DING Li2, YING Cong bo1
（1.School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;2.Shanghai Volkswagen Automotive Company, Shanghai 201805, China）

Abstract: Aiming at measuring the flow characteristics and dynamic response for electronic controlled injectors with high accuracy and efficiency, a new kind of measuring system was designed based on the working principle of high resistance electronic controlled injectors. A microchip was used to control the operation of injector and get signal. LabVIEW was used as the upper computer to display curves. Combined with the Matlab script, the data was fileted and calculated to help testers obtain accurate results. The results indicate that the measurement error of the flow characteristics is less than 0.02 mg and measurement error of dynamic response is less than 7.1 us. The system can test the flow characteristic and dynamic response of the injector automatically with high accuracy.

Key words: electronic controlled injectors; flow characteristics; dynamic response; test system; LabVIEW; single chip microcomputer