Acceleration of the Electro-hydraulic Variable Valve Actuator for a Cam-less Engine by using a 3-port switching valve
Acceleration of the Electro-hydraulic Variable Valve Actuator for a Cam-less Engine by using a 3-port switching valve
复制标题
使用三通切换阀加速无凸轮发动机电液可变气门执行器
DOI：
10.5739/jfps.37.50
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Hirohisa Tanaka
中科院分区：
文献类型：
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作者：
Nozomi Toyoda;Hirohisa Tanaka
近年来，用于无凸轮发动机的可变气门执行器有电磁式和电液式两种。这些执行器的问题是如何在没有任何电子位置传感器的情况下实现对阀门着陆速度减速的可靠控制。考虑到这一点，前一种类型的执行器对气体压力变化的抵抗力不那么强，而后者存在功率浪费和快速运动控制速度受限的问题。2002年，作者开发了一种无传感器电液阀门执行器(EHVA)，该执行器具有液压机械位置反馈机构，使用了一个二端口开关阀。它在24ms内运行，行程定位为12 mm。本文介绍了在EHVA上应用三通开关阀，使发动机转速达到2100rpm，气门总开启时间为19ms的加速技术。利用键合图仿真程序对EHVA的参数进行了优化，成功地在19ms内完成了气门升程的全行程运动。
In recent years, two types of variable valve actuators, electromagnetic and electro-hydraulic, have been developed for cam-less engines. The issue of these actuators is how to attain reliable control of the valve landing-velocity deceleration without any electronic position sensor. With this in mind, the former type of actuator is not so resistant to gas-pressure change, while the latter has issues of power waste and limited speed for quick motion control. The authors developed a sensor-less electro-hydraulic valve actuator (EHVA), with a hydro-mechanical position feedback mechanism in 2002 by using a 2-port switching valve. It operated in 24ms for positioning 12mm in stroke. This paper presents acceleration technology for working at an engine speed of 2100rpm and total valve opening time of 19ms, by applying a 3-port switching valve to the EHVA. The parameters of the EHVA were optimized using the bond graphs simulation program, and it succeeded in completing the valve lift motion within 19ms in a full stroke.