A Computational and Experimental Study of Combustion Chamber Deposit Effects on NOx Emissions

Studzinski, William; Liiva, P. M.; Choate, Peter J.; Acker, William P.; Litzinger, Thomas A.; Bower, Stanley L.; Smooke, Mitchell D.; Brezinsky, Kenneth

doi:10.4271/932815

Cited by 21 publications

(3 citation statements)

References 5 publications

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“…The reason could be that more deposits were formed with engine operation, which leads to combustion deterioration, and then lower combustion temperature leads to less NO x emission. It was found that deposits in the engine led to the increase of NO x emissions; however, the main objective of the paper was to investigate the influence of lubricating oil on deposits formation under high power density. The results cannot prove the influence of deposits on NO x emissions.…”

Section: Results Analysismentioning

confidence: 99%

The influence of lubricating oil on deposits formation in a diesel engine under the operation condition of high power density

Dong

Liang

Shu

2013

Lubrication Science

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The requirements of higher power density and stricter regulations on emissions of internal combustion engines lead to lubricating oil's role shifting from simply lubricating to adapting higher power density and to achieving lower emissions. An important factor influencing an engine's power and emissions is the deposits in the engine. Lubricating oil is a chief contributor to deposits formation. The objective of this paper is to investigate the influence of lubricating oil on deposits formation when the engine is operated under high power density. Metal elements content in lubricating oil and changes to power and emissions were measured to verify deposits changes. Different power densities can be achieved by adjusting the fuel supply system in the engine. Three kinds of synthesised lubricating oils were used in the investigation. The temperature of the oil pan and cooling water was strictly controlled. The experimental results demonstrated well the influence of the quality of different kinds of oil on deposits formation.

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Section: Results Analysismentioning

confidence: 99%

The influence of lubricating oil on deposits formation in a diesel engine under the operation condition of high power density

Dong

Liang

Shu

2013

Lubrication Science

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“…The one of exhaust gas from fuel combustion which is affects to combustion chamber deposits are the nitric oxides (NO x ). The formation of NO x during the engine cycle has been shown to have a strong dependence on mean gas temperature in the cylinder, increasing by over 44% with an increase in burn gas temperature from 2000 K to 2050 K [10]. Thus, the increasing temperatures due to the insulating and heat-storage effects of the deposits can be expected to increase engine-out NO x emissions.…”

Section: Combustion Chamber Depositmentioning

confidence: 97%

Thermal analysis of cylinder head carbon deposits from single cylinder diesel engine fueled by palm oil–diesel fuel emulsions

et al. 2009

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“…With regards to NOx emissions, the deposits tend to lead to increased emissions. 1–3 Statistically, a significant increase is observed in NOx emissions with an increase in deposit thickness. 4 The low thermal conductivity of deposits, especially non-volatile deposits such as ash, produces higher in-cylinder temperatures, thus leading to higher NOx emissions.…”

Section: Introductionmentioning

confidence: 97%

A review of experimental studies on deposits in the combustion chambers of internal combustion engines

Shu

Dong

Liang

2012

International Journal of Engine Research

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This article reviews experimental studies on deposits in engine combustion chambers, with emphasis on deposit composition, damage to engines, formation mechanisms and study methods. The existence of combustion chamber deposits will definitely influence performance and emissions of engines, and is inevitable with the use of petroleum fuel and lubricating oil. These all make it necessary to study the formation, composition, structure and influential factors of deposits, which will provide the basis for reducing deposits in engines. Influential factors and methods of reducing deposit formation are also included. First, the deposit damage to engines is briefly introduced, with a focus mainly on the decline in engine performance and the deterioration of emissions, and the reasons for these phenomena are explained. Next, conclusions on deposit research approaches to their chemical composition and physical structure are drawn. Finally, with regards to deposit formation in gasoline and diesel engines, deposit composition and factors influencing deposit formation, such as engine type, fuel type, oil type, additives, exhaust gas recirculation, etc., are enumerated through experimental studies on engines. Studies on deposit formation with some newly developed types of fuel are also included. The mechanism of deposit formation under these different conditions is explained, and the methods for reducing deposit formation are summarized.

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A Computational and Experimental Study of Combustion Chamber Deposit Effects on NOx Emissions

Cited by 21 publications

References 5 publications

The influence of lubricating oil on deposits formation in a diesel engine under the operation condition of high power density

The influence of lubricating oil on deposits formation in a diesel engine under the operation condition of high power density

Thermal analysis of cylinder head carbon deposits from single cylinder diesel engine fueled by palm oil–diesel fuel emulsions

A review of experimental studies on deposits in the combustion chambers of internal combustion engines

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