CAJ | 학술논문

　　为了掌握排气阀运动特性，应用AMESim软件建立了船用低速智能柴油机排气阀驱动系统计算模型，在与试验数据对比验证的基础上进行了排气阀驱动过程仿真分析。分析了排气阀液压控制单元的进油口倒角、回油口倒角、排气阀节流孔等主要参数对排气阀的开启和关闭过程的影响规律，得出以下结论：随着排气阀液压控制单元进油口倒角的增大，排气阀开启时刻提前，关闭时刻延后且伺服油压力越小，影响越明显；排气阀关闭过程的关闭时间长度随排气阀液压控制单元回油口倒角增加而逐渐减小；排气阀开启时间随排气阀节流孔径增大而逐渐增加，而节流孔径增大，排气阀关闭时刻提前。
　　위료장악배기벌운동특성，응용AMESim연건건립료선용저속지능시유궤배기벌구동계통계산모형，재여시험수거대비험증적기출상진행료배기벌구동과정방진분석。분석료배기벌액압공제단원적진유구도각、회유구도각、배기벌절류공등주요삼수대배기벌적개계화관폐과정적영향규률，득출이하결론：수착배기벌액압공제단원진유구도각적증대，배기벌개계시각제전，관폐시각연후차사복유압력월소，영향월명현；배기벌관폐과정적관폐시간장도수배기벌액압공제단원회유구도각증가이축점감소；배기벌개계시간수배기벌절류공경증대이축점증가，이절류공경증대，배기벌관폐시각제전。
For the purpose of predicting the exhaust opening and closing processes, the researchers built a calcula?tion model of an exhaust valve driving mechanism for intelligent low?speed marine diesel engine utilizing the AMES?im software, to accurately simulate exhaust valve driving process and also validate functionality of the models by comparing test data. The function of the oil inlet chamfer, oil return chamfer and the orifice to the open and close progress of the hydraulic exhaust valve were analyzed and the corresponding conclusions were drawn. As the oil inlet chamfer of the hydraulic control unit of exhaust valve increases, the opening of the hydraulic exhaust valve takes place earlier and the closing of the hydraulic exhaust valve takes place later. The smaller the servo oil pressure, the more obvious phenomenon. The length of the close time of the hydraulic exhaust valve is smaller with the increase of the oil outlet chamfer. With the throttle diameter being bigger, it allows the open time of the hydraulic exhaust valve to be longer. Thus, the bigger the throttle diameter, the earlier the close time of the hydraulic exhaust valve.