| EFFECTS OF COOLED EXTERNAL EXHAUST GAS RECIRCULATION ON DIESEL HOMOGENEOUS CHARGE COMPRESSION IGNITION ENGINE |
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| 作者姓名： | SHI Lei CUI Yi DENG Kangyao Key Laboratory for Power Machinery and Engineering of Ministry of Education Shanghai Jiaotong University Shanghai China |
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| 作者单位： | SHI Lei CUI Yi DENG Kangyao Key Laboratory for Power Machinery and Engineering of Ministry of Education，Shanghai Jiaotong University，Shanghai 200030，China |
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| 基金项目： | 国家重点基础研究发展计划(973计划)
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国家自然科学基金 |
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| 摘 要： | The effects of cooled external exhaust gas recirculation (EGR) on the combustion and emission performance of diesel fuel homogeneous charge compression ignition (HCCI) are studied. Homogeneous mixture is formed by injecting fuel in-cylinder in the negative valve overlap (NVO) period. So, the HCCI combustion which has low NOx and smoke emission is achieved. Cooled external EGR can delay the start of combustion effectively, which is very useful for high cetane fuel (diesel) HCCI, because these fuels can easily self-ignition, which makes the start of combustion more early. External EGR can avoid the knock combustion of HCCI at high load which means that the EGR can expand the high load limit. HCCI maintains low smoke emission at various EGR rate and various load compared with conventional diesel engine because there is no fuel-rich area in cylinder..
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| 关 键 词： | 柴油机 载荷极限 燃料 自燃现象 汽车 |
EFFECTS OF COOLED EXTERNAL EXHAUST GAS RECIRCULATION ON DIESEL HOMOGENEOUS CHARGE COMPRESSION IGNITION ENGINE |
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| SHI Lei CUI Yi DENG Kangyao Key Laboratory for Power Machinery and Engineering of Ministry of Education,Shanghai Jiaotong University,Shanghai ,China.EFFECTS OF COOLED EXTERNAL EXHAUST GAS RECIRCULATION ON DIESEL HOMOGENEOUS CHARGE COMPRESSION IGNITION ENGINE[J].Chinese Journal of Mechanical Engineering,2007,20(1):21-24. |
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| Authors: | SHI Lei CUI Yi DENG Kangyao |
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| Affiliation: | Key Laboratory for Power Machinery and Engineering of Ministry of Education,Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | The effects of cooled external exhaust gas recirculation (EGR) on the combustion and emission performance of diesel fuel homogeneous charge compression ignition (HCCI) are studied. Homogeneous mixture is formed by injecting fuel in-cylinder in the negative valve overlap (NVO) period. So, the HCCI combustion which has low NOx and smoke emission is achieved. Cooled external EGR can delay the start of combustion effectively, which is very useful for high cetane fuel (diesel) HCCI, because these fuels can easily self-ignition, which makes the start of combustion more early. External EGR can avoid the knock combustion of HCCI at high load which means that the EGR can expand the high load limit. HCCI maintains low smoke emission at various EGR rate and various load compared with conventional diesel engine because there is no fuel-rich area in cylinder. |
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| Keywords: | Homogeneous charge compression ignition(HCCI) Combustion Cooled exhaust gas recirculation(EGR) Emission ENGINE IGNITION COMPRESSION CHARGE HOMOGENEOUS DIESEL EXHAUST GAS RECIRCULATION EXTERNAL rate high load conventional diesel engine area cylinder avoid means early delay start smoke |
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