Abstract:

According to the fact that the scavenging effect of heavy-duty gas engine is insufficient,and problem of low control precision of the air-fuel ratio and slow response,an injection device using the moving-coil electromagnetic linear actuator and mushrooms type valve structure was proposed herein.The electronically controlled injection device can achieve multiple-point sequential and intermittent fuel injection.The design and the principles of the main design parameters determination were discussed.The design of injection device was completed and a prototype was developed.The digital controller of the injection device was also developed for characteristic tests.The results show that the technical solution can meet the
 engine's requirements of high flow rate and response.

Key words: gas engine, multiple-point sequential and intermittent injection, electronically controlled injection device, electromagnetic linear actuator

摘要：

针对大功率气体燃料发动机扫气不充分、空燃比控制精度低和响应慢等问题,提出了一种应用动圈式电磁直线执行器和菌型阀结构的气体燃料电控喷射装置,实现气体燃料的多点顺序间歇喷射以改善发动机的性能。讨论了设计方案和主要设计参数的确定原则,完成了设计并研制了样件。开发了电控喷射装置控制器,并对样件进行了性能测试。试验表明,电控喷射装置的技术方案可以满足发动机的大流量、高响应等要求。

关键词: 气体燃料发动机, 多点顺序间歇喷射, 燃料电控喷射装置, 电磁直线执行器