一种发动机电磁驱动配气机构应用研究

Application of Engine Electromagnetic Actuated Valvetrain

为了改善发动机的动力性、经济性和排放性能,该文以满足发动机高转速和有限安装空间为设计目标,研究了一类应用动圈式电磁直线执行器的电磁驱动配气机构。应用有限元分析的方法设计得到了电磁驱动配气机构的结构参数。通过汽油机性能仿真分析了发动机中应用电磁驱动配气机构的优越性。模拟缸盖的试验测试表明,与常规发动机相比,应用该电磁驱动配气机构的发动机具有更大的设计与控制自由度和优化空间,以及良好的电磁力特性和较小的时间常数,易于控制。在单缸发动机上的运行和性能测试表明,该机构的气门响应时间小于4 ms,落座速度小于0.3 m/s,可满足在发动机上的应用需求;且在中低转速下运行良好,实现了配气机构的柔性化调节。

In order to improve the torque output,fuel economy,and emissions of the engine,an electromagnetic actuated valvetrain using the moving coil electromagnetic linear actuator is developed according to the requirements of high speed and limited space.The configuration parameters are designed by the finite element method.The advantage of electromagnetic actuated valvetrain is analyzed by gasoline engine performance simulation.An improved electromagnetic actuated valvetrain is realized and tested on an pseudo cylinder.The results show that,compared with the common engine,the electromagnetic actuated valvetrain engine has more design and control flexibility,good force characteristic and low time constant,so it is easy for control.The valvetrain is integrated and tested on a single-cylinder gasoline engine.The test results show that it has excellent performance at low and middle engine speeds and fully variable valve actuation,and the transition time of 4 ms and seating velocity of 0.3 m/s are acceptable for engine application.