Analysis of the Internal Combustion Engine Crankshaft Rotation Dynamics and of the Torques Acting on the Crankshaft

Abstract

The article provides a comparative analysis of the dynamics of the internal combustion engine crankshaft rotation and the torque acting on it. In practice, it is a significant difficulty to determine both the angular velocity of the crankshaft and the determination of the torques acting on it. The features of determining the angular velocity of rotation of an engine crankshaft based on the signal of a standard sensor for the position of this shaft are considered. A method for determining the moment of friction forces and the moment of the payload is presented, as well as an experimental method for determining the moment of inertia of rotating parts. This technique involves determining the effective torque in each cylinder based on the response --- a change in the speed of rotation of the crankshaft. When solving this problem, it is advisable to consider two forms of relationship between the dynamics of engine crankshaft rotation and the torques acting on it. The first of them is differential, which is the relationship between crankshaft acceleration and torque. The second is the integral relationship between the change in kinetic energy of the moving parts of the engine and the operation of the gas forces. The results of this analysis can be used in the development of a technique for indirectly indicating processes occurring in engine cylinders

Please cite this article in English as:

Aleksandrov A.V., Morozkin T.V. Analysis of the internal combustion engine crank-shaft rotation dynamics and of the torques acting on the crankshaft. Herald of the Bauman Moscow State Technical University, Series Mechanical Engineering, 2026, no. 2 (157), pp. 102--120 (in Russ.). EDN: QEWVQJ

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