Open Access

ARTICLE

Thermo-Mechanical Analysis of the Sealing Performance of a Diesel-Engine Cylinder Gasket

Xulan Wang^1,*, Zezhong Chen¹, Changzhen Liu¹, Wei Ren², Bo Wu¹, Shude Ji¹, Xiaofei Chen¹, Shijie Wen¹, Yonggang Hao¹
1 System Engineering Institute, China North Engine Research Institute, Tianjin, 300400, China
2 Engine Department, BAIC Motor Co., Ltd., Beijing, 101106, China
* Corresponding Author: Xulan Wang. Email:
(This article belongs to this Special Issue: Recent Advances in Fluid Mechanics and Thermal Sciences)

Fluid Dynamics & Materials Processing 2021, 17(4), 821-831. https://doi.org/10.32604/fdmp.2021.014707

Received 22 October 2020; Accepted 15 March 2021; Issue published 17 May 2021

Abstract

Taking the combustor composite structure of a high-strength diesel engine as the main research object, dedicated tests have been conducted to verify the accuracy of three distinct cylinder gasket pressure simulation models. Using the measured cylinder gasket compression rebound curve, a gasket unit has been designed and manufactured. For this unit, the influence of the bolt pretension, cylinder body and cylinder head material on gasket sealing pressure has been investigated systematically in conditions of thermo-mechanical coupling. The results show that the bolt pretension force is one of the most important factors affecting the cylinder gasket sealing pressure. The change of the body material has little effect on this pressure. The cylinder gasket seal pressure decreases progressively with the reduction of the elastic module of the cylinder head material.

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Keywords

Cylinder gasket; bolt pretension force; sealing; cylinder head material

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