CAJ | 학술논문

建立液压式气门驱动系统的动力学数学模型，利用Simulink软件建立仿真模型并对系统中的凸轮油缸和气门油缸的环形密封泄漏进行仿真计算。研究结果表明，液压式气门驱动系统的泄漏主要是相对运动引起的剪切流量，并与凸轮型线有关；气门油缸只在凸轮升程段和基圆存在泄漏，凸轮油缸只在凸轮回程段和基圆存在泄漏，且泄漏均随着发动机转速和密封间隙的增大而增大；可通过减小密封间隙和设计合理的凸轮型线来减小泄漏。
건립액압식기문구동계통적동역학수학모형，이용Simulink연건건립방진모형병대계통중적철륜유항화기문유항적배형밀봉설루진행방진계산。연구결과표명，액압식기문구동계통적설루주요시상대운동인기적전절류량，병여철륜형선유관；기문유항지재철륜승정단화기원존재설루，철륜유항지재철륜회정단화기원존재설루，차설루균수착발동궤전속화밀봉간극적증대이증대；가통과감소밀봉간극화설계합리적철륜형선래감소설루。
The dynamic mathematical model of the hydraulic valve actuation system was established.The simulation model was established by Simulink software,and the leakage of annular seal in cam cylinder and valve cylinder was calcu-lated by simulation.The results show that the main leakage of the hydraulic valve actuation system is the shear flow caused by the relative motion between the piston and cylinder,and the leakage is associated with the cam profile.The leakage of valve cylinder is only existed in the lift section and base circle of cam,and the leakage of cam cylinder is only existed in the return section and base circle of cam.Both the leakage of valve cylinder and the leakage of cam cylinder are increased with the increase of engine speed and the seal clearance.The leakage can be reduced by reducing the seal clearance and designing the reasonable cam profile.