FAILURE ANALYSIS OF AN EXHAUST VALVE IN A BUS ENGINE

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GHIASI H.; SOLTANLOU M.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Paper Information

Journal: THE JOURNAL OF ENGINE RESEARCH Year:2015 | Volume:11 | Issue:38 Page(s): 27-37

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Information Journal Paper

Title

FAILURE ANALYSIS OF AN EXHAUST VALVE IN A BUS ENGINE

Author(s)

GHIASI H. | SOLTANLOU M. | Issue Writer Certificate

Keywords

EXHAUST VALVEQ2

FAILUREQ2

FAILURE ANALYSISMQ2

FATIGUEQ2

HIGH TEMPERATUREQ2

Abstract

Both of the exhaust and intake valves are very important components of a diesel engine which are used to control the entrance and exhaust of gases in internal combustion engines. During opening and closing, these valves are subjected to HIGH TEMPERATURE, spring force and high pressure (up to 15 Mpa) inside the cylinder. Various factors, including mechanical FATIGUE at HIGH TEMPERATUREs, thermal FATIGUE, reduction their mechanical properties such as hardness and yield strength due to heating, wear caused by impacts, especially at the seat and the guide sections, corrosion, excessive heating and accumulation of soot on the valve can be caused to FAILURE of the valve.However, the valves are mainly FAILUREd by FATIGUE. The temperature of internal portions of intake valve and EXHAUST VALVE are 550oC and 800-900oC, respectively. Therefore, these parts are subjected to thermal loading and chemical corrosion at HIGH TEMPERATUREs. In this research, the FAILURE causes of a bus EXHAUST VALVE were studied using chemical analysis, macroscopic and microscopic investigations by optical and scanning electron microscopes and hardness test. It was found that the probable cause of FAILURE is the improper performance of the engine which results in excessive rising of temperature and finally causes to FAILURE of valve.

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APA: Copy

GHIASI, H., & SOLTANLOU, M.. (2015). FAILURE ANALYSIS OF AN EXHAUST VALVE IN A BUS ENGINE. THE JOURNAL OF ENGINE RESEARCH, 11(38), 27-37. SID. https://sid.ir/paper/135589/en

Vancouver: Copy

GHIASI H., SOLTANLOU M.. FAILURE ANALYSIS OF AN EXHAUST VALVE IN A BUS ENGINE. THE JOURNAL OF ENGINE RESEARCH[Internet]. 2015;11(38):27-37. Available from: https://sid.ir/paper/135589/en

IEEE: Copy

H. GHIASI, and M. SOLTANLOU, “FAILURE ANALYSIS OF AN EXHAUST VALVE IN A BUS ENGINE,” THE JOURNAL OF ENGINE RESEARCH, vol. 11, no. 38, pp. 27–37, 2015, [Online]. Available: https://sid.ir/paper/135589/en

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