武建德,谢荣,张忠伟,等.基于参变量扫值和正交设计的柴油机配气机构凸轮型线优化设计[J].内燃机工程,2023,44(4):39-47.
基于参变量扫值和正交设计的柴油机配气机构凸轮型线优化设计
Optimising the Cam Profile of Camshaft for A Diesel Engine Based on Parametric Sweeping and Orthogonal Design
DOI：10.13949/j.cnki.nrjgc.2023.04.006
关键词:配气机构  凸轮型线  正交设计  参变量扫值  多目标优化
Key Words:valvetrain  cam profile  orthogonal design  parametric sweeping  multiobjective optimization
基金项目:内燃机可靠性国家重点实验室开放基金项目（SKLER-201903）
作者单位E-mail
武建德* 中北大学 机械工程学院，太原 030051 wujiande12@126.com 
谢荣 山西大唐国际神头发电有限责任公司 设备部热工组，朔州 036011  
张忠伟 中国北方发动机研究所，天津 300400  
杨志浩 潍柴动力股份有限公司 内燃机可靠性国家重点实验室，潍坊 261061  
赵俊生* 中北大学 机械工程学院，太原 030051 zjs@nuc.edu.cn 
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摘要:建立了12V150高功率密度柴油机凸轮轴全阀系动力学模型，以跃度（配气机构运动学指标）、接触应力（动力学指标）、润滑系数（流体动力润滑特性指标）作为优化目标，选取第二分段宽度、第六分段幅值和第二分段幅值作为对称式六分段凸轮加速度型线的关键设计参数，通过参变量扫值和正交试验设计进行了极差分析和方差分析，完成了对称式六分段凸轮加速度型线设计中关键参数的多目标优化。结果表明，第二分段宽度对凸轮接触应力最大值及润滑系数最大值影响高度显著，第二分段宽度和第二分段幅值对跃度最大值影响高度显著。接触应力最大值与润滑系数最大值可作为主要权衡目标进行优化，而跃度最大值可由第二分段幅值进行有效调节。
Abstract:A dynamic model of a valvetrain system of the multi-cylinder 12V150 diesel engine was established. Cam jerk， cam contact stress and lubrication coefficient were taken as optimization objectives. Several key design parameters of the symmetric six-segment cam acceleration profile including the second segment width， the sixth segment amplitude and the second segment amplitude were selected. Numerical simulations were carried out by using parametric sweeping and orthogonal design. A multi-objective optimization of the key parameters of the symmetric six-segment cam acceleration profile was conducted. The results show that the width of the second segment has a significant influence on the maximum contact stress and the lubrication coefficient of the cam. And the width of the second segment and the amplitude of the second segment have highly significant influence on the maximum jump. The maximum value of contact stress and the maximum value of lubrication coefficient can be optimized as the main trade-off objectives， while the maximum value of jump can be effectively adjusted by the amplitude of the second segment.
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