主办：陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊：1976年
汽车实用技术

汽车实用技术 ›› 2023, Vol. 48 ›› Issue (19): 92-97.DOI: 10.16638/j.cnki.1671-7988.2023.019.018

• 设计研究 • 上一篇    

米勒循环混动专用发动机凸轮型线优化设计

韦善景，阙爱华，李露露，梅 夏   

  1. 上汽通用五菱汽车股份有限公司
  • 出版日期:2023-10-15 发布日期:2023-10-15
  • 通讯作者: 韦善景
  • 作者简介:韦善景（1989－），男，研究方向为混动系统动力学及 NVH 仿真，E-mail:shanjing.wei@sgmw.com.cn。

Optimization Design of Cam Profile for Miller Cycle Hybrid Special Engine

WEI Shanjing, QUE Aihua, LI Lulu, MEI Xia   

  1. SAIC GM Wuling Automobile Company Limited
  • Online:2023-10-15 Published:2023-10-15
  • Contact: WEI Shanjing

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摘要： 为了改善发动机噪声、振动与声振粗糙度（NVH）性能和配气机构耐久性能，应用 GT-POWER 软件对米勒循环混动专用发动机的凸轮型线进行选型仿真，并利用 Ricardo VALDYN 软件对配气机构单阀系的运动学和动力学进行分析，研究凸轮型线各项参数对配气 机构运动过程的影响，并对凸轮型线进行优化。优化凸轮型线后仿真结果如：弹簧中心点振 动位移为 1.28 mm、凸桃与挺柱间接触应力为 695 MPa、凸桃与挺柱接触线偏心量为 12.5 mm。 研究结果表明，增加凸轮型线正加速度跨度（θ1+θ2+θ3），弹簧中心点振动位移减小；减小 θ1 跨度，凸桃与挺柱间接触应力减小；增大凸轮型线等速区域跨度 θ4，凸桃与挺柱接触线偏心 量减小。

关键词: 混动专用发动机；凸轮型线；NVH 性能；配气机构

Abstract: In order to improve engine noise, vibration, harshness (NVH) performance and valve train durability, GT-POWER software is used to make the simulation analysis of the cam profile selection of miller cycle hybrid engine. After that the Ricardo VALDYN software is used to analyze the kinematics and dynamics of valve train to study that how the parameters of cam profile influences the movement of valve train, at last optimization the cam profile. After optimization, the vibration displacement of middle point of spring is 1.28 mm; the contact stress between cam and tapper is 695 MPa, the eccentricity of contact line between cam and tapper decreases to 12.5 mm. It shows that the span of positive acceleration (θ1+θ2+θ3) increases, the vibration displacement of middle point of spring decreases.when the θ1 decreases, the contact stress between cam and tapper decreases. The eccentricity of contact line between cam and tapper decreases when the span of the cam profile in constant velocity region (θ4)increases.

Key words: Hybrid special engine; Cam profile; NVH performance; Valve train