Dizel Bir Motorda Al2O3 İlaveli Cr2O3 Termal Bariyer Kaplamaların Egzoz Emisyonlarına Etkisi

The NiCr bond coated piston and valve surfaces were coated with Cr2O3, Cr2O3 + 50% Al2O3, Cr2O3 + 75% Al2O3 powders by thermal barrier coating (TBC). The influence of the coating layers on CO, CO2, HC and NOx was examined both statistically and experimentally. The statistical investigation was carried out by using Taguchi analysis. According to the experimental test results obtained at different engine speeds, the sample with the highest CO2 value was found at 2600 rpm in the Cr2O3 + 75% Al2O3 coated diesel engine and the sample with the lowest CO value was found at 2600 rpm in the Cr2O3 + 75% Al2O3 coated diesel engine. Also, the sample with the lowest NOx value was found at 1400 rpm in the standard diesel engine and the sample with the lowest HC value was found at 2600 rpm in the Cr2O3 + 75% Al2O3 coated diesel engine. Experimental results were analyzed by Taguchi optimization method according to L16 (42) orthogonal array. According to the statistical results obtained from ANOVA test, factor levels affecting the exhaust emission values best were found. In general, better emission values have been determined in diesel engines with bond coated ceramic layers.

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Taguchi method for investigation of the effect of TBC coatings on NiCr bond-coated diesel engine on exhaust gas emissions

Özel

Vural

Binici

2020

International Advanced Researches and Engineering Journal

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The investigation of effect of the ceramic coatings with bond-layer coated on piston and valve surface on engine performance of a diesel engine

Vural

Özel

2020

International Advanced Researches and Engineering Journal

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The piston and valve surfaces of diesel engine have been coated with Cr2O3, Cr2O3+50%Al2O3 and Cr2O3 + 75% Al2O3 ceramic powders with bond coat (NiCr) by atmosferic plasma spray (APS) method. The engine performance of the coated engine were compared with the standard engine values by using that the engines tests were applyed repeat for each specimen in an electrical dynamometer in full power 1400 rpm, 1700 rpm, 2000 rpm, 2300 rpm, 2600 rpm, 2900 rpm and 3200 rpm engine speeds. In the results; it has been seen that engine power increased from 7% to 29%, engine torque from 7% to 23%, and exhaust gas temperatures from 6% to 17%, thermal brake efficiencyfrom 2.8% to 12.7% while specific fuel consumption decreased of 2.8% to 11.5%.

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Dizel Bir Motorda Al2O3 İlaveli Cr2O3 Termal Bariyer Kaplamaların Egzoz Emisyonlarına Etkisi

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References 12 publications

Taguchi method for investigation of the effect of TBC coatings on NiCr bond-coated diesel engine on exhaust gas emissions

Taguchi method for investigation of the effect of TBC coatings on NiCr bond-coated diesel engine on exhaust gas emissions

The investigation of effect of the ceramic coatings with bond-layer coated on piston and valve surface on engine performance of a diesel engine

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