Abstract
The task of the investigation is to make the model, the algorithm, the program and the results of the calculations of optimization of the parameters of the bearing sliding of piston pin of the internal-combustion engine. An approximate mathematical model of dynamically loaded bearings of a piston pin of the internal-combustion engine was built up with the account of calculation methods of the statically loaded sliding bearings. The approximate mathematical model describes the relationship of output parameters of bearings of piston pin the operational and structural factors. The model is based on the method of M.V..Korovchinskiy of hydrodynamic calculation of statically loaded sliding bearings. The solution of optimization task was performed with the help of the author’s program in MATLAB environment. The optimization was produced by using the gradient release method. At each iteration a step was calculated in the condition of minimum of the function of the independent variable. The program of the calculation is a finished product and it can be used at the designing of the bearings of sliding engines.
Highlights
The task of the investigation is to make the model, the algorithm, the program and the results of the calculations of optimization of the parameters of the bearing sliding of piston pin of the internalcombustion engine
The development and improvement of internal combustion engines requires the study of hydrodynamic processes of bearings, including bearings of the piston pin
This paper presents an algorithm, a program, and the results of calculations made on the basis of an approximate mathematical model of V
Summary
The development and improvement of internal combustion engines requires the study of hydrodynamic processes of bearings, including bearings of the piston pin. Quadrupeds evaluation of dynamic loads of the bearing under conditions of semi-fluid, and boundary friction; increment the temperature of the lubricating layer; the eccentricity; the relationship of the length of the piston head to the diameter of the piston. The required parameters: l – is the length of the piston head; ∆ - diametrical bearing clearance; μ - dynamic viscosity of the oil. The solution of the optimization problem depends on the main requirements for the optimization object For sliding bearings, such requirements may be: work with a minimum lubrication flow and simultaneously with a minimum temperature increment of the lubricant layer; work with a minimum lubrication flow and a minimum coefficient of friction; work with a minimum relative eccentricity and a minimum coefficient of friction, etc.
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