Analysis of time-domain characteristic for the block vibration signal of diesel engine
PAN Chi
GAI Yongtian
AN Guo
MA Xin
WANG Jinyong
JI Shaobo
Abstract：In order to study the influence of the operation state of the internal combustion engine and the clearance of the main bearing on the vibration signal of block surface,a test bench of a certain six-cylinder diesel engine is established.The peak-to-peak value,rectified average value,variance,standard deviation root mean square value of the vibration acceleration of the block surface vibration signal are taken as the time-domain characteristic values,and the influence of different engine operation speeds,output torque,oil temperatures and main bearing clearances on each time-domain characteristic value are analyzed.The experimental results show that the time-domain characteristic and the peak value of combustion pressure increases with the increase of engine speed,torque and main bearing clearance increases,the time-domain characteristic and the peak value of combustion pressure decreases with the rise of oil temperature.
Keywords：crankshaft main bearingabnormal wearblock vibrationtime-domain analysis
Publication Date：2025-03-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 38-44 )