Establishing thermal balance during the cooling system improvement of an air-cooled engine

Authors

DOI:

https://doi.org/10.15587/2706-5448.2023.293642

Keywords:

diesel engine, F4L912, air cooling, piston seizure, airflow, hot climate

Abstract

The object of research is the air-cooling system, for F4L912 direct injection diesel engine (mounted on the bench), manufactured by the Motor Enterprise (EMO). It is a naturally aspirated inline 4-cylinder engine. Maximum engine power is 49 kW obtained at maximum speed rotation of 2300 rpm. Air cooling is a critical aspect of engine performance, and studying it experimentally can provide valuable insights into the engine's thermal behaviour and efficiency. One of the most problematic places is the high local temperature of the 4th cylinders sleeves. An innovative improvement of the cooling system is proposed. It is based on increasing the cooling air flow. It consists in the installation of new driving pulleys of the blowing turbine with different diameters. The use of these new pulleys allowed moderating the wall temperature of the liner and the cylinder head of the 4th cylinder and the thermal rebalancing of the engine. Significant improvements have been noted in cylinder wall temperature, exhaust gas temperature, and lubricating oil temperature. Drawing up the heat balance enabled us to quantify the useful work, the heat lost in the cooling water, the heat lost through the exhaust gases, the heat carried away by the lubricating oil and other losses (losses not accounted for). It is clear from the results that the high temperature in the engine has indeed been reduced and the cooling performance of the whole engine has been improved. The results show that the increase in airflow produced an improvement in cooling conditions as well as a reduction in exhaust gas temperatures which will have a significant impact on reducing NOx emissions. In future work, it is planned to improve the cooling system of the Emo F4L912 engine, by studying the effects of the geometry, number, and inclination of the turbine blades on the air flow supplied.

Author Biographies

Abdessalem Mekroud, Mentouri Brothers University Constantine

PhD

Institute of Applied Sciences and Techniques

Lyas Bidi, Mentouri Brothers University Constantine

PhD

Institute of Applied Sciences and Techniques

Salim Boukebbab, Mentouri Brothers University Constantine

Professor

Department of Transport Engineering

Laboratory of Transports and Environment Engineering

Mohamed Salah Boulahlib, Mentouri Brothers University Constantine

Professor

Department of Transport Engineering

Laboratory of Transports and Environment Engineering

Rachid Chaib, Mentouri Brothers University Constantine

Professor

Department of Transport Engineering

Laboratory of Transports and Environment Engineering

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Establishing thermal balance during the cooling system improvement of an air-cooled engine

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Published

2023-12-20

How to Cite

Mekroud, A., Bidi, L., Boukebbab, S., Boulahlib, M. S., & Chaib, R. (2023). Establishing thermal balance during the cooling system improvement of an air-cooled engine. Technology Audit and Production Reserves, 6(1(74), 13–20. https://doi.org/10.15587/2706-5448.2023.293642

Issue

Vol. 6 No. 1(74) (2023): Industrial and technology systems

Section

Mechanical Engineering Technology

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Copyright (c) 2023 Abdessalem Mekroud, Lyas Bidi, Salim Boukebbab, Mohamed Salah Boulahlib, Rachid Chaib

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