UDC 621.43.068
DOI 10.36461/NP.2024.72.4.012

STUDY OF HEAT AND EXHAUST GAS FLOW RATE DEPENDING ON DIESEL ENGINE OPERATION MODE
A.A. Nikulin, graduate student; A.A. Orekhovaya, сandidate of Technological Sciences, Associate Professor;
G.A. Spitsyn, doctor of technical sciences, рrofessor
Penza State Agrarian University, Penza, Russia, tel. 8 (904) 266-18-55,
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

In the article, the influence of low ambient temperatures on the thermal operation of transmission elements, namely, the drive axles of trucks, is considered. On one hand, the issues of maintaining an effective thermal mode of operation of an internal combustion engine (ICE) have been considered in sufficient detail and resolved. On the other, the problem of heating the drive axles of cars at low ambient temperatures remains relevant. During prolonged operation, the structural arrangement of these components on the vehicle contributes to cooling even in steady-state thermal conditions. A practical solution to this problem will significantly increase the efficiency of using trucks and achieve a positive economic effect due to resource conservation.
The purpose and objectives of the research were formulated. Using MathCad 2016, MS Office Excel 2010, the following characteristics were calculated: speed, flow rate and heat of the exhaust gases, depending on the operating modes of the diesel engine, using the example of KamAZ 740. These characteristics are required to determine the parameters of the heat exchanger device. It has been found that the exhaust gas velocity and flow rate increase with increasing crankshaft speed.
The amount of heat in the internal combustion engine, which is released as a result of fuel combustion, has been analyzed. It has been established that during the operation of the KamAZ 740 diesel engine, up to 28.1% of the heat released during fuel combustion is dissipated into the environment with exhaust gases, which allows for research on the development of methods for the secondary use of exhaust heat aimed at ensuring an effective temperature regime for the driving axles of vehicles.
Keywords: exhaust gases, exhaust system, car, thermal regime, ambient temperature.

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