基于数据采集卡的开关阀性能测试系统设计

Design of VVL on-off valve performance test system based on NI data acquisition card

摘要:

为实现汽车发动机用零配件可变行程技术(VVL)开关阀性能测试的自动化，设计了一种基于NI6221数据采集卡的VVL开关阀性能测试系统，该系统能够提供油路压力为250 kPa和1 MPa、机油温度为35 ℃±2 ℃的测试环境，对开关阀的流量特性、耐压特性、工作电压以及响应时间等参数进行检测，并判定零件合格与否。通过实际应用表明，该系统只需一次手工装夹即可实现开关阀50 s/件的自动检测效率，具有稳定性和可靠性。

Abstract:

To achieve the automation of a kind of Variable Valve Lift(VVL) on-off valve used for the automobile engine，a performance test system based on NI6221 data acquisition card is designed. The system is able to provide the test environment of fuel supply pressure of 250 kPa and 1 MPa and the temperature of 35 ℃±2 ℃. The valves can be judged qualified or not by testing the parameters of flow characteristic，voltage endurance, working voltage and response time. The test items，indexes，hardware and the software are described in this paper. The practical application indicates that the system can execute the test of on-off valves automatically at the efficiency of 50 s/unit with manual clamping for only one time，and it can keep steady and reliable performance as well.