
	Journal of Applied Sciences
	Year: 2010 \| Volume: 10 \| Issue: 6 \| Page No.: 462-470 DOI: 10.3923/jas.2010.462.470

Friction Reduction in Compressed Natural Gas Direct Injection Engine using Piston Rings with Diffusion Chromium Coating

S. Abdullah, E. Adril, A. Muchtar and A.K. Ariffin

Abstract: In order to combat dry lubrication occurred in the combustion chamber of a compressed natural gas direct injection engine, the piston or piston rings have to be equipped with measures to address this boundary lubrication issue. Hence, the aim of the study is to address the issue which can minimize sliding friction in the combustion chamber between the piston ring and the cylinder liner. To solve this problem, the wear resistance level toward friction for piston ring during its interaction with the cylinder liner was enhanced using diffusion coating technique. The piston ring is made of ASSAB DF-3 steel and several substances such as 0.9% carbon (C), 0.85% chromium (Cr), 96.6% ferric (Fe), 1.2% manganese (Mn) and 0.55% titanium. The chemical substance which is used for the diffusion process are the mixture of three substances i.e., chromium, ammonium chloride (NH₄Cl) and aluminum oxide (Al₂O₃). The piston ring together with the chromium mixtures were heated at different periods of time. In order to improve friction and wear, the piston ring which is coated with 99.5% chromium dust using a diffusion coating technique yields higher hardness compared to the original piston ring due to its resistance toward wear. The hardness depends on the time maintained during heating. Furthermore, it was also shown that the modified piston ring led to better reduction in coefficient of friction as well as less weight loss due to wear. These characteristics can result in better endurance during engine operation and prevent damage due to lubrication failure.

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How to cite this article:

S. Abdullah, E. Adril, A. Muchtar and A.K. Ariffin, 2010. Friction Reduction in Compressed Natural Gas Direct Injection Engine using Piston Rings with Diffusion Chromium Coating. Journal of Applied Sciences, 10: 462-470.

DOI: 10.3923/jas.2010.462.470

URL: https://scialert.net/abstract/?doi=jas.2010.462.470

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