Research on Equivalent Air Leakage Area Detection Model of Heavy Vehicle Diesel Engine

doi:10.3969/j.issn.1000-1093.2018.10.002

Abstract

Abstract: A double-ring geometric simplified model of the leakage process of diesel engine cylinder-piston ring is established for quantitatively detecting the leakage condition of diesel engine in the non-dismantling state. The mathematical expression of leakage area of piston ring is deduced by analyzing the flow and pressure changes of the cylinder air during compression stroke. The influence of thermal defor- mation of piston ring on the leakage is analyzed, and an equivalent air leakage area detection model of cylinder- piston ring is established. The results show that the equivalent air leakage area is consistent with the wear condition of diesel engine cylinder liner, the correlation with the working condition of diesel engine is low, and the proposed model can reflect the current leak condition of diesel engine. Key

Key words: heavyvehicle, dieselengine, leakdetection, cylinderliner-pistonring, benchtest

CLC Number:

TK427

YANG Shao-qing, ZHAI Zhen-dong, WANG Xian-cheng, WANG Xue. Research on Equivalent Air Leakage Area Detection Model of Heavy Vehicle Diesel Engine[J]. Acta Armamentarii, 2018, 39(10): 1883-1891.

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第39卷
第10期2018 年10月兵工学报ACTA
ARMAMENTARIIVol.39No.10Oct.2018

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