Design method of engine cylinder gasket

Abstract

The invention relates to a design method of an engine cylinder gasket. The design method comprises the steps that geometric models of a cylinder cover, a cylinder body, the cylinder gasket and bolts are established; dividing grids; boundary condition processing: applying bolt pre-tightening force, applying assembly interference magnitude between a valve retainer and a cylinder cover of a cylinder body, applying assembly interference magnitude between a valve guide pipe and the cylinder cover of the cylinder body, and performing CFD temperature field result mapping corresponding to three reliability bench tests of the engine respectively; applying gas explosion pressure in the combustion chamber of the cylinder body, and enabling the applied gas explosion pressure and the temperature field to form sequential thermal force coupling; performing finite element analysis calculation; obtaining respective sealing pressure and dynamic disengagement gap of the cylinder gasket under a gas explosion pressure working condition and a temperature field working condition; judging whether each sealing pressure is within a preset standard sealing pressure range and each dynamic separation gap is within a preset standard dynamic separation gap range or not; and if yes, determining that the cylinder gasket meets design requirements.

Description

technical field [0001] The invention relates to the technical field of computer-aided engineering (CAE), in particular to a design method of an engine cylinder gasket. Background technique [0002] In today's automotive engineering field, CAE (Computer Aided Engineering) has been widely used in product design, and has become an effective tool for discovering problems, solving problems, and supporting product development in the process of automotive development. Among them, the finite element method can achieve high precision in analyzing structural stress, strain, deformation, vibration, temperature and fatigue, and can solve various problems in the process of engineering development. This method uses finite element analysis tools to predict the weak sealing area of ​​the cylinder head gasket under the actual working conditions of the bench, and provides a design method for the cylinder head gasket of the automobile engine. [0003] When using the finite element method, it ...

AI Technical Summary

Problems solved by technology

At present, the temperature field used in the finite element analysis of the cylinder head gasket is based on the CFD simulation data of the engine full-speed and full-load bench test, which cannot cover the three major reliability bench tests of the engine, especially the engine thermal shock bench test and engine Alternating load bench test for these conditions with sharp temperature changes, and these are also test items that focus on the sealing performance of cylinder head gaskets

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