Study Sealing Performance Of JL466Q1Gasoline Engine Based On ANSYS

In order to reduce costs and the consumption of resources, automotive engine design hasdeveloped into the lightweight and precision direction now. Composite structure material light,thin is frequently used in design, but these materials are often insufficient rigidity and itsflatness is difficult to control the shape, large variability, which causes bolt with insufficientload and uneven distribution. The surface sealing pressure and pressing force unevenphenomenon caused by these problems is a frequent. But engine sealing performance is animportant performance index, which directly affects the engine working efficiency and life.In the current domestic production enterprises, the detection of the cylinder gasket surface andthe sealing testing methods commonly used is the use of pressure induction paper and softmetal material, according to the enterprises test standards of the related pressing force.Although this method is economical, but it cannot simulate the normal working environmentof the engine and cannot detect the deformation in each field of engine by force, thus itgreatly affected engine sealing performance.Using CAE technology to test the cylinder gasket sealing will become a importantmethod of the industry development. In this paper, it used the modern digital modelingtechnology and modern digital analytic technology, and been integrated with the CADtechnology and the finite element analysis method which is widely applied in the field ofengineering. It analysised the cylinder gasket with Bolt Pretension and gas of hightemperature and high pressure in the gasoline engine working condition, achieved thetemperature field, stress field and deformation field. Through the results were analyzed,compared and modified, realizing the complete production process from design, evaluation toredesign.This paper firstly reviewed the development status and trend of gasoline engine cylindergasket, introduced the application of CAE technology in engine design, the main analysis ofthe modal analysis, and thermal structure coupling analysis and static structure analysismethod applied in engine design. According to the entity mapping and research, it used theentity modeling of SolidWorks software to model the engine and the cylinder gasket, input theFEA software ANSYS Workbench by the interface technology between modeling softwareand analysis software, and make a overall analysis of the engine assembly. Through the wholeengine assembly modal analysis of the frequencies and mode shapes, can effectively preventthe occurrence of resonance and provide the basis for the future dynamic analysis; Making asimulation of thermal structure with the practical boundary conditions of workingenvironment achieved the temperature field of engine gasket, making it as the temperatureload, and considering the bolt preload and gas explosive force finally get the final cylindergasket stress distribution and deformation. Adjusting the bolt preload by the changes innephogram can effectively optimize repousse stress. It makes sure the cylinder gasket stress as much as possible to achieve uniform, the best sealing effect, can even change theunreasonable part of the original to optimization of cylinder gasket shape.This paper derives from Jinzhou guanghe seals Enterprise Co. Ltd. It made a test tocompared the analysis result above with the practical, optimized the local large deformation,modified the bolt pretightening load, and detected the contact press between the sealingsurfaces finding that its accord with the actual working conditions. It provided a theoreticalguidance for the Gasoline engine structure optimization design in the future.