2012 Fiscal Year Final Research Report
Combustion characteristics of a dual fuel diesel engine with biodiesel as ignition fuels
| Project/Area Number |
22560839
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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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) |
2010 – 2012
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| Keywords | 二元燃料ディーゼル機関 / 天然ガス吸入 / バイオディーゼル / セタン価 / DME 混合 / 吸気希釈 / 機関性能 / 排ガス特性 |
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| Research Abstract |
This study investigated the influence of operating variables on engine performance, combustion characteristics, and emissions with a dual fuel diesel engine powered by natural gas (CNG) supplied from the intake-pipe as the main fuel and an ignition fuel sprayed into the combustion chamber. The results showed that: (1) at high loads the dual operation requires ignition fuels with cetane numbers higher than 45; (2) when DME (di-methyl ether) a compound with a high reaction rate is premixed with the CNG, the pattern of the combustion is very different for different CNG supply ratios; and (3) remarkable improvements in the trade-off relation between the NOx and smoke emissions are possible when N2 or CO2 gas dilution of the intake air was employed with dual fuel diesel combustion.
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