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Integral approach to assessing energy losses during the motion of a traction vehicle with a hydro-mechanical transmission

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Parent Category: 2026

Category: Content №2 2026

Created on 25 April 2026

Last Updated on 25 April 2026

Published on 30 November -0001

Written by I. Taran, N. Saukhanov, I. Klymenko

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Authors:

I. Taran, orcid.org/0000-0002-3679-2519, Rzeszow University of Technology, Rzeszow, Republic of Poland

N. Saukhanov, orcid.org/0009-0004-7292-4752, Aktobe Regional University named after K. Zhubanov, Aktobe,  Republic of Kazakhstan

I. Klymenko*, orcid.org/0000-0002-6263-0951, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2026, (2): 067 - 075

https://doi.org/10.33271/nvngu/2026-2/067

Abstract:

Purpose. To develop an integral approach for assessing energy losses arising during the motion of a traction vehicle equipped with a split-power hydro-mechanical transmission, with particular attention to power circulation in the planetary summation mechanism.

Methodology. A theoretical model of a split-power hydro-mechanical transmission was developed to achieve this objective. The model incorporates planetary gear kinematics, power distribution between transmission branches, and internal power circulation effects. An integral indicator is introduced to evaluate energy losses over the operating speed range of the traction vehicle.

Findings. The results show that power circulation and the associated energy losses strongly depend on transmission control parameters and operating speed. In certain regimes, circulating power reaches significant levels, leading to a noticeable reduction in overall transmission efficiency. The proposed approach makes it possible to identify parameter regions in which integral energy losses are minimized.

Originality. The originality of the study lies in the formalization of power circulation as an independent energy component of the traction vehicle motion process and in the development of an integral loss assessment approach. This allows the transition from point-based efficiency evaluation to a comprehensive analysis of transmission energy behaviour across the entire operating range.

Practical value. The obtained results can be used in the design and tuning of hydro-mechanical transmissions for traction vehicles to reduce energy losses, decrease thermal loading of planetary mechanisms, and increase transmission durability. The proposed integral approach to loss assessment provides a practical tool for selecting hydraulic machine parameters and operating regimes under real operating conditions.

Keywords: split-power transmission, power circulation, energy losses, planetary mechanism, vehicle

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