Abstract
A comparative analysis of the stress-strain state of the connecting rods with a traditional I-beam and H-beam rod profiles was performed in order to compare various designs of the connecting rods and identify the factors that affect the main parameters of the internal combustion engine. Using the finite element simulation, it was found that the H-beam conrod has a much greater transverse bending rigidity, but is inferior to the I-beam profile conrod in terms of its mass. The calculations also determined that the frequency of natural oscillations of the H-beam profile conrod is significantly higher as well, what was confirmed by the testing on high-speed engines. The obtained data on piston operation with the H-beam conrod concluded that a more rigid connecting rod makes it possible to exclude transverse oscillations, reduce mechanical losses and improve the characteristics of the engine.
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