Optimization design of the electronically controlled injector

Mathematical models of the electronically controlled injector are given based on the characteristics of the system. The models have included solenoid, valve and injector. Then simulation program was built with matlab simulink. The influences of structure parameters on the system performance are studied with simulation program. The approximation model of injector was established based on the regression function, which had considered responsibility and economy. The parameters of the system configuration are optimized with mutiobject program. The whole injector was designed based on the optimized results. The dynamic response characteristic of optimized injector was tested on testing equipment. Testing results were the same with simulation results. The optimized injector, who´s open and close response time are both 0.2 ms, has a very good injection wave shape which is similar to that of the control signal.