【摘要】 以某进气歧管喷射式电控喷油器样品结构为对象,以提高动态响应特性为目标,通过增设隔磁套对其磁路总体结构进行了改进.利用Ansys软件环境建立了电控喷油器磁路的有限元模型,以电磁场仿真结果为基础对其轭铁、滑动气隙等参数进行了优化.通过试验,对改进前后电控喷油器样品的动态响应特性及流量特性进行了对比.结果表明:改进后电控喷油器的开启滞后时间比改进前缩短了0.28ms,关闭滞后时间缩短了0.14ms,单位脉宽下动态流量平均增加了1.8mg左右,并且不同喷油脉冲下的喷油量均比改进前有了较大提升.更多还原

【Abstract】 Taking the sample structure of an electronic injector used in intake manifold gasoline injection system as an object,the magnetic circuit structure was redesigned by adding a magnetic isolation sleeve to improve its dynamic response characteristics.The finite element model of the injector’s magnetic circuit was established with the help of Ansys software circumstance,and the parameters of the yoke iron and sliding air gap were improved based on the electromagnetic field simulation results.The dynamic characteristics and flow characteristics of the injector before and after improvement were compared by test.The results show that the open delay time is shortened by 0.28 ms,the close delay time is shortened by 0.14 ms,and the average dynamic flow rate is increased by about 1.8 mg.In addition,the fuel mass injected at different injection pulse is larger than that before improvement.更多还原