基于硬件在环的柴油机排放测试系统研究

Research on Diesel Engine Emission Testing System Based on Hardware-in-the-Loop

为减少柴油机开发验证的周期和成本,建立了柴油机CruiseM仿真模型和闭环Simulink I/O子模型,通过将软硬件进行集成,完成了对基于硬件在环(HIL)的测试系统搭建。分别在稳态工况和瞬态工况下对搭建的测试系统进行试验验证,结果表明,基于硬件在环的柴油机排放测试结果在稳态工况下燃油消耗率平均相对误差为1.7%,NO原排平均相对误差为6.1%,瞬态工况下全工况区域的平均燃油消耗量相对误差为4.6%,NO原排累积量相对误差为0.58%,与实际台架结果相比具有较高精度,可支撑柴油机开发过程中的性能验证。

In an attemp to reduce the cycle and cost of diesel engine development and verification,a diesel engine CruiseM simulation model and a closed-loop Simulink I/O sub-model were established,and a hardware-in-the-loop(HIL)-based test system was built by integrating software and hardware.The built test system is tested and verified under steady state and transient conditions,respectively.The results show that the average relative error of fuel consumption rate based on hardware-in-the-loop diesel engine emission test results under steady state conditions is 1.7%,NOThe average relative error of the original exhaust is 6.1%,the relative error of the average fuel consumption in the entire working area under transient conditions is 4.6%,and the relative error of the cumulative amount of NOoriginal exhaust is 0.58%,which has sufficient accuracy compared with the actual bench results.It can support performance verification during the development of diesel engines.