Analysis of the sensitivity of factors affecting the peak pressure of a diesel engine based on orthogonal experiment design method
ZHAO Qiang
SUN Nannan
WANG Xiaoyan
JIA Demin
SHI Lei
WANG Guohua
Abstract：In order to improve the reliability and calibration efficiency of diesel engines,a certain diesel engine is taken as the experimental object,based on the orthogonal test design method,the effects of injection pressure,injection timing,and exhaust gas recirculation(EGR)valve opening on engine peak pressure under the lowest fuel consumption condition are studied,and the sensitivity of the influencing factors is calculated by range and variance analysis.The results showes that as the injection pressure increases from 120 MPa to 140 MPa,the peak pressure increases by 1.04 MPa.The advance angle increases from 8° to 10° before the top dead center,and the explosion pressure increases by 1.68 MPa.The opening of the EGR valve decreases from 50％to 30％,and the peak pressure increases by 0.55 MPa.The sensitivity order of the three factors affecting peak pressure is:injection timing,injection pressure,EGR valve opening.
Keywords：orthogonal test design methodinjection pressureinjection timeEGR valve openingpeak pressurefactor sensitivity
Publication Date：2024-10-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 39-43 )