Wear resistance and lubricity of the spiral oil distribution profile of the valve guide sleeves of an internal combustion engine
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Дата
2024
Автори
Назва журналу
Номер ISSN
Назва тому
Видавець
Хмельницький національний університет
Анотація
Valve guides are crucial for maintaining the correct alignment, positioning, and clearance of the valve stem
as it moves in the cylinder head. When the guides are heavily worn, the engine begins to consume oil and the valve
mechanism becomes noisy. Reliable lubrication of the inner surface of the guide bushing ensures the wear
resistance of the valve-guide pair. This work proposes a special tool and technology for obtaining an oil-retaining
profile on the inner surface of the valve guide, which increases the oil capacity of the surface, and therefore
improves the lubrication conditions in the valve-guide friction pair. A gas labyrinth seal is created in the
connection, which prevents oil from entering the combustion chamber. The surface of the bushing bore is
strengthened due to the sealing of the surface. The results of wear tests of guide bushings with spiral oil-retaining
grooves confirmed their effectiveness in terms of wear resistance. The wear rate of the bushings with grooves for
the entire time range of the tests is on average 20% less than the wear rate of the bushings without grooves.
Опис
Ключові слова
internal combustion engine, valve guide, lubricity, oil-retaining spiral profile, tests
Бібліографічний опис
Dykha O. V. Wear resistance and lubricity of the spiral oil distribution profile of the valve guide sleeves of an internal combustion engine / O. V. Dykha, A. A. Vychavka, M. O. Dykha // Problems of Tribology. – 2024. – Vol. 29, No 4/114. – Р. 32-39.