Study on Lean Burn Gas Engine Using Pilot Oil as the Ignition Source

Saitô, Hitoshi; Sakurai, Teruhiro; Sakonji, Tatsuo; Hirashima, Takayoshi; Kanno, Kazuyoshi

doi:10.4271/2001-01-0143

Cited by 29 publications

(19 citation statements)

References 1 publication

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“…On the other hand, however, other studies (Saito et al 1999(Saito et al , 2000 have shown that the increase in the compression-ignition delay is smaller at higher temperatures. The authors of the studies conducted their experiments controlling the temperature at the beginning of the injection by heating the charge aspired into the engine cylinder.…”

Section: Introductionmentioning

confidence: 91%

Effect of CNG in a Fuel Dose on the Combustion Process of a Compression-Ignition Engine

et al. 2015

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Currently, one of the major trends in the research of contemporary combustion engines involves the potential use of alternative fuels. Considerable attention has been devoted to methane, which is the main component of Natural Gas (NG) and can also be obtained by purification of biogas. In compression-ignition engines fired with methane or Compressed Natural Gas (CNG), it is necessary to apply a dual-fuel feeding system. This paper presents the effect of the proportion of CNG in a fuel dose on the process of combustion. The recorded time series of pressure in a combustion chamber was used to determine the repeatability of the combustion process and the change of fuel compression-ignition delay in the combustion chamber. It has been showed that NG does not burn completely in a dual-fuel engine. The best conditions for combustion are ensured with higher concentrations of gaseous fuel. NG ignition does not take place simultaneously with diesel oil ignition. Moreover, if a divided dose of diesel is injected, NG ignition probably takes place at two points, as diesel oil.

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Section: Introductionmentioning

confidence: 91%

Effect of CNG in a Fuel Dose on the Combustion Process of a Compression-Ignition Engine

et al. 2015

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“…Moreover, for DieseleCNG, lengthy ignition delay has been noted at all exceed air. Saito et al [42] stated that the extended ignition delay is because of the reduced partial oxygen pressure in air which impacts the usual diesel compression ignition.…”

Section: Combustion Characteristicsmentioning

confidence: 99%

A two-component CFD studies of the effects of H2, CNG, and diesel blend on combustion characteristics and emissions of a diesel engine

Alrazen

Talib

Ahmad

2016

International Journal of Hydrogen Energy

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DieselNatural gas Hydrogen a b s t r a c t Numerical simulations were conducted on a Ricardo Hydra diesel engine which is single cylinder engine and uses direct injection method. This study was performed by using a two-dimensional CFD code to examine the combustion characteristics and emissions of a diesel engine in dieseleCNG and dieseleH 2 dual-fuel operations, as well as in the diesel eCNGeH 2 tri-fuel operation at various air-fuel ratios. The results indicate that the peak incylinder pressure and peak temperature were increased with the addition of gaseous fuels at low and medium values of exceeds air. Compared with DieseleH70eN30 for tri-mode and DieseleH 2 for dual mode, it is observed that there were no effects on the peak temperature at high exceed air. At 2.4 exceed air, the peak pressure increases by means of adding the limit value of hydrogen, such as H30eN70 and H50eN50, to CNG and it begins to decrease with H70eN30 and H 2 eDiesel operations. DieseleH 2 eCNG operations decrease CO/CO 2 emissions compared with DieseleCNG operation and decrease NO emission compared with DieseleH 2 operation at every exceed air. The reduction in CO/CO 2 emissions was suggested at high hydrogen fraction in CNG (H70eN30) with all exceeds air whereas low hydrogen fraction in CNG (H30eN70) can repress uncontrolled hydrogen combustion and further limit the increment of NO emission.

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“…A dual fuel diesel engine, a kind of HCCI engine, fuelled with natural gas (NG) and ignited by a small amount of gas oil was investigated to reduce both NOx and particulate emissions simultaneously by Kusaka, et al [1] , Ishida, et al [2] , Tagai, et al [3] and Saito, et al [4] previously, and also studied by Carlucci, A. P., et al [5] and Papagiannakis, R. G., et al [6] recently. A similar dual fuel engine fuelled with methanol and assisted by a small amount of gas oil was tested by the authors [7][8][9] .…”

Section: Introductionmentioning

confidence: 99%

Remarkable improvement of NOx–PM trade-off in a diesel engine by means of bioethanol and EGR

Ishida

Yamamoto

Ueki

et al. 2010

Energy

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In order to realize a premixed compression ignition (PCI) engine, the effects of bioethanolgas oil blends and exhaust gas recirculation (EGR) on PM-NOx trade-off have been investigated focusing on ignition delay, premixed combustion, diffusion combustion, smoke, NOx and thermal efficiency. The present experiment was done by increasing the ethanol blend ratio and ethanol and by increasing the EGR ratio in a single cylinder direct injection diesel engine. It is found that a remarkable improvement in NOx-PM trade-off can be achieved by promoting the premixing based on the ethanol blend fuel having low evaporation temperature, large latent heat and low cetane number as well, in addition, based on a marked elongation of ignition delay due to the low cetane number fuel and the low oxygen intake charge. As a result, very low levels of NOx and PM, which satisfies the 2009 emission standards imposed on heavy duty diesel engines in Japan, were achieved without deterioration of brake thermal efficiency in the PCI engine fuelled with the 50% ethanol blend diesel fuel and the high EGR ratio. It is noticed that smoke can be reduced even by increasing the EGR ratio under the highly premixed condition.

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Study on Lean Burn Gas Engine Using Pilot Oil as the Ignition Source

Cited by 29 publications

References 1 publication

Effect of CNG in a Fuel Dose on the Combustion Process of a Compression-Ignition Engine

Effect of CNG in a Fuel Dose on the Combustion Process of a Compression-Ignition Engine

A two-component CFD studies of the effects of H2, CNG, and diesel blend on combustion characteristics and emissions of a diesel engine

Remarkable improvement of NOx–PM trade-off in a diesel engine by means of bioethanol and EGR

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