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    • Influences of Diesel Engine Intake Port Structure Parameters on Intake Port Performances Based on Grey Relational Analysis
    DOI：10.13949/j.cnki.nrjgc.2025.03.009
    Key Words:diesel engine  helical intake port  structural parameters  greycorrelation analysis  polynomial approximation algorithm
    Author NameAffiliationE-mail
    BAO Guangyuan* Key Laboratory of Vehicle Environmental Protection and Safety in Plateau Mountain Area of Yunnan Provincial Colleges， Southwest Forestry University， Kunming 650224， China 2546296009@qq.com 
    ZHANG Wei Yunnan Key Laboratory of Internal Combustion Engine， Kunming University of Science and Technology， Kunming 650500， China sfu-2006@163.com 
    HE Chao* Key Laboratory of Vehicle Environmental Protection and Safety in Plateau Mountain Area of Yunnan Provincial Colleges， Southwest Forestry University， Kunming 650224， China chao.he@swfu.edu.cn 
    WANG Dongge Key Laboratory of Vehicle Environmental Protection and Safety in Plateau Mountain Area of Yunnan Provincial Colleges， Southwest Forestry University， Kunming 650224， China 1557374073@qq.com 
    LI Jiaqiang Key Laboratory of Vehicle Environmental Protection and Safety in Plateau Mountain Area of Yunnan Provincial Colleges， Southwest Forestry University， Kunming 650224， China lijiaqiangok@swfu.edu.cn 
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    Abstract:In order to improve the performance of diesel engine helical intake port， the influences of helical chamber height， intake port eccentricity and intake port deflection angle on airway performance was systematically studied through grey relational analysis. The results show that the airway structural parameters with the strongest influence to the weakest influence on swirl ratio and intake mass are helical chamber height， intake port eccentricity， intake port deflection angle and helical chamber height， intake port deflection angle， intake port eccentricity. When helical chamber height is 5.04 mm and intake port eccentricity is 2.82 mm， the swirl ratio reaches the maximum value of 2.102. Meanwhile， when helical chamber height is 5.04 mm and intake port deflection angle is 5.2°， the intake mass reaches the maximum value of 0.715 g. Through the polynomial approximation algorithm， the explicit expressions of the swirl ratio model and the intake mass model were established. The two models performed well in terms of prediction accuracy and fit. The root mean square errors for the swirl ratio and the intake mass are 0.04 and 0.05， respectively， and the coefficients of determination for the swirl ratio and the intake mass are 0.95 and 0.93， respectively.
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