摘要
利用配气机构模拟计算软件AVL/TYCON,在国内某具有液压挺柱的四缸汽油机的基础上,采用多项动力加速度函数、分段加速度函数和多项动力一分段加速度函数三种函数方法拟合非对称凸轮型线。将配有液压挺柱的配气机构当量成单质量运动模型,并结合其他参数,应用AVL软件模块建立AVL运动学模型,通过该模型计算出凸轮型线的位移和速度,并分析对比不同凸轮型线的丰满系数、跃度以及凸轮和液压挺住的最大接触应力。最后,建立动力学模型,分析气门和气门座的耐久性。
Three profiles of unsymmetrical cam in the forms of polydyne,individual section acceleration and Poly-ISAC curves were used in the valve cam designing for the four-cylinder gasoline engine with a hydraulic lash adjuster tappet through the valve-train simulation software,AVL / TYCON.The OHC with a hydraulic lash adjuster tappet is equivalent to the single mass kinetic models.Then in combination with other parameters,using the AVL software modules establishes the AVL kinetic model.And displacement and speed curves of these profiles were calculated.And analyzing their fullness coefficient,jerk and contact between cam and tappet,the final optimized profile was determined.At the last,based on the multi-freedom dynamic model,the durability of the valve and valve seat was analyzed.
出处
《机械设计与制造》
北大核心
2012年第11期77-79,共3页
Machinery Design & Manufacture
基金
山西省科技厅国际合作项目资助(2008081017)
