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Pistons and crankshaft bearing system is a key component of an internal combustion engine , and its tribology, dynamic performance directly affects the reliability and durability of the engine , its hydrodynamic lubrication and EHL research has important significance. In this paper, hydrodynamic lubrication theory, the introduction of pressure flow factor , shear flow factor, contact factor deduced piston skirt structure for film lubrication Reynolds equation mathematical model . The model considers the surface roughness of the skirt , skirt type line for film lubrication effect , combined with the analysis of dynamic equations of the piston of the second movement of the piston , the establishment and development of a numerical finite element method for solving Reynolds equation FORTRAN source code in order TBD620 diesel engine , for example, to calculate the piston skirt lubrication film pressure , film thickness , friction skirt , skirt -type noodles. This paper also crankshaft bearing lubrication characteristics were studied by ordinary Reynolds equation, considering the cavitation effect , the journal does not tilt, tilt and elastic deformation , using JFO boundary conditions , using the finite element method and discrete control equation numerical methods , such as conservation of mass algorithm, approximate factorization algorithm , wavefront method, Jill France , and the preparation of a MATLAB program and FORTRAN programs to calculate the bearing lubrication oil film pressure and thickness , load and elastic deformation. Detailed study of a number of parameters on the performance of the work process , the conclusion of an internal combustion engine pistons and crankshaft bearing system provides a reference tribological properties evaluation methods , as well as pistons and bearings are designed to provide the theoretical basis for the design of low-noise engine has a certain significance.
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