2015 Fiscal Year Final Research Report
Improvements in combustion characteristics of a dual fuel diesel engine with natural gas
| Project/Area Number |
25420927
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Energy engineering
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| Research Institution | Niigata Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | ディーゼル機関 / 二元燃料 / 天然ガス / バイオディーゼル / 機械式過給 / クールドEGR / 正味熱効率 / トレードオフ改善 |
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| Outline of Final Research Achievements |
The aim of the present study is to improve combustion characteristics of a dual fuel diesel engine. In this investigation, natural gas (CNG) is supplied to an intake-pipe and the ignition fuel is injected into the combustion chamber. The experiments used coconut oil methyl ester (CME) and JIS No. 2 diesel fuel as the ignition fuel, and a technique combining cooled EGR and supercharging was employed. The results showed that the trade-off relation between the NOx and smoke emissions improved remarkably without worsening the brake thermal efficiency at a condition of 40% CNG supply, 120 kPa boost pressure, and 26% EGR (17% oxygen concentration in the intake air). The smoke reductions with CME were better than with diesel fuel.
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| Free Research Field |
工学
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