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    • 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
    Key Words:valvetrain  cam profile  orthogonal design  parametric sweeping  multiobjective optimization
    Author NameAffiliationE-mail
    WU Jiande* College of Mechanical Engineering， North University of China， Taiyuan 030051， China wujiande12@126.com 
    XIE Rong Equipment Thermal Engineering Group， Shanxi Datang International Shentou Power Co.， Ltd.， Shuozhou 036011， China  
    ZHANG Zhongwei China North Engine Research Institute， Tianjin 300400， China  
    YANG Zhihao State Key Laboratory of Internal Combustion Engine Reliability， Weichai Power Co.， Ltd.， Weifang 261061， China  
    ZHAO Junsheng* College of Mechanical Engineering， North University of China， Taiyuan 030051， China zjs@nuc.edu.cn 
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    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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