Study of the Dynamic Characteristics of a Two-cylinder Internal Combustion Engine Using Vector Models

Abstract

It is known that there is the influence of mass and geometric parameters such as the ratio of the lengths of crankshaft and connecting rod of the main mechanism of ICE on the dynamic characteristics of the engine. At the same time the effect of the mutual disposition of crankshafts in multi-cylinder engines on the dynamic characteristics that depend on the location of the cylinders themselves (in-line, v-shaped, horizontally-opposed engine) is not analyzed. The goal of the research is to evaluate the impact of changes in the angle between the crankshafts depending on the position of the cylinders, on improvement of the dynamic characteristics of ICE. For the solution of the matter in question was used the software package KDAM developed on the basis of the method of vector space model, which is capable of modeling different linkages, as well as the indicator diagrams of ICE. The results of numerical experiment show that parameters under consideration do not significantly effect on the amount of torque, but at the same time, their optimization reduces the load on the crankshaft and the vibration of the motor housing. It is important to understand that the obtained results are optimal only for the selected weight dimension characteristics of units and their locations. At the same time, it can be concluded that for the different types of ICE, due to their structural optimization can be obtained less dynamically loaded constructions.