Examination of the Oil Combustion in a S.I. Hydrogen Engine

Li, Hailin; Karim, G. A.; Sohrabi, A.

doi:10.4271/2004-01-2916

Cited by 15 publications

(11 citation statements)

References 13 publications

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“…Figure 5-13 shows that boost is inversely related to combustion duration, and as a result increased boost results in increased absolute oil consumption. Li et al [4] found a good correlation between phi and combustion duration, but this was not the case in this study. However, they had a wider range for phi at a lower compression ratio and had only a single level of boost.…”

Section: Residual By Predicted Plotcontrasting

confidence: 77%

“…Li et al [4] have observed that knock in an engine can cause significantly higher oil consumption than encountered during normal combustion. The smaller quenching distance of hydrogen, which varies with air/fuel ratio, implies that flames may enter crevices, more closely approach cylinder walls, and contribute to the observed oil consumption [4].…”

Section: Lubricant Oil Consumption Measurement Using Trace Metals Anamentioning

confidence: 99%

“…Combustion duration is inversely related to flame speed or flame propagation rate in the case of spark ignition engines [4]. As a result, shorter combustion duration (higher flame propagation) results in a higher consumption of oil from the combustion chamber walls.…”

Section: Residual By Predicted Plotmentioning

confidence: 99%

“…Studies [4][5][6][7] conducted in the past on hydrogen fueled engines have reported negligible amounts of carbonaceous emissions and high levels of NOx emissions. Hydrogen fueled engines can suffer from many of the same drawbacks that are typical of natural gas engines.…”

Section: Introductionmentioning

confidence: 99%

“…The lubricant oil consumption can be determined from the measurement of carbon (measured as CO 2 , CO, and THC) bearing exhaust emissions from a hydrogen-fueled engine as these would be produced solely due to the oxidation of lubrication oil. This method of lubricant oil consumption measurement has been found to yield accurate results compared to other conventional methods, such as tracer techniques [4][5][6][7]. [8,22] have promoted the use of natural gas among other alternative fuels.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of lubricant oil consumption and its contribution to particulate matter emissions

George¹

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The global objective of this study was to determine lubricant oil consumption as a function of engine operating conditions, and determine its contribution to particulate matter (PM) emissions in a hydrogen-fueled engine. Hydrogen offers a promising alternative for internal combustion engines owing to its clean burning properties. The success of gaseousfueled engines lies in the development and use of specially formulated and well researched lubricating oils as these oils are the only source of carbon emissions in hydrogen-fueled engines. The lubricant oil consumption can be determined in a hydrogen-fueled engine by measuring the carbonaceous emissions. This study determined lubricant oil consumption as a function of engine speed, equivalence ratio, and boost for hydrogen-fueled engine operation. The oil consumption data was fitted using multiple linear regression analysis. Elemental Carbon/Organic Carbon analysis, trace metals analysis, ions analysis, and particle size distributions at various steady state operating conditions were also performed to have an understanding of lubricant contribution to particulate emissions. The lubricant oil consumption was also measured using trace metal markers such as Ca and Zn. Oil consumption models would help in calculating ash accumulation in exhaust after-treatment devices like diesel particulate filters (DPF). The oil consumption was found to be well correlated to engine operating conditions. The particulate matter was found to be almost completely organic carbon, and the synthetic oil derived organic fraction was found to be lower in spite of its higher volatility for the conditions tested. It was found that the trace metal marker method for oil consumption determination was not a suitable method as a result of the different rates of consumption of base stocks versus additives. The particle size distributions in the case of hydrogen-fueled operation were found to be in the same order of magnitude as a diesel engine. The particle size distributions and number concentrations were found to be more influenced by the engine operating conditions and amount of oil consumed, and was not influenced by the difference in the oil volatility or the nature of the base stock (synthetic versus mineral) for the conditions tested in this study.

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Section: Residual By Predicted Plotcontrasting

confidence: 77%

Section: Lubricant Oil Consumption Measurement Using Trace Metals Anamentioning

confidence: 99%

Section: Residual By Predicted Plotmentioning

confidence: 99%