Performance and Emission Characteristics of a Direct-Injection Spark-Ignition Hydrogen Enriched Natural Gas Engine Diluted with EGR

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Performance and Emission Characteristics of a Direct-Injection Spark-Ignition Hydrogen Enriched Natural Gas Engine Diluted with EGR

更新时间：2025-07-09

- Performance and Emission Characteristics of a Direct-Injection Spark-Ignition Hydrogen Enriched Natural Gas Engine Diluted with EGR
- Vol. 45, Issue 7, Pages: 5-8+69(2011)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK431.2
- Online First：10 July 2011，
  
  Published：2011
- 稿件说明：
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Performance and Emission Characteristics of a Direct-Injection Spark-Ignition Hydrogen Enriched Natural Gas Engine Diluted with EGR[J]. 2011, 45(7): 5-8+69.
DOI：

Performance and Emission Characteristics of a Direct-Injection Spark-Ignition Hydrogen Enriched Natural Gas Engine Diluted with EGR[J]. 2011, 45(7): 5-8+69. DOI：

摘要

在一台天然气/氢气混合燃料的缸内直喷火花点火发动机上通过引入废气再循环(EGR)实验研究了EGR率、掺氢比及喷射时刻对发动机性能和排放的影响.结果表明:掺入氢气

在小EGR率时可以减小平均有效压力(BMEP)和有效热效率

在大EGR率时可以增加BMEP和有效热效率; BMEP随EGR率的增大而减小

有效热效率随EGR率的增大先减后增.NO

排放随EGR率的增大而下降

随掺氢比的增大而上升; HC排放随EGR的增大而上升

随掺氢比的增大而下降; CO排放与EGR率变化基本无关

随掺氢比的增大而上升.平均指示压力变动系数C

imep

随EGR率的增加而增大

相比于早喷射

晚喷射时C

imep

的增大趋势更为明显

此时掺氢可以有效降低C

imep

Abstract

An experimental study was conducted on a direct-injection spark-ignition(DISI)engine fuelled with hydrogen-natural gas blends with the introduction of EGR(exhaust gas recirculation). The effects of the EGR rate

the hydrogen fraction and the injection timing on the engine performance and emission characteristics were investigated. The results show that the hydrogen addition reduced the brake mean effective pressure(BMEP)and the brake thermal efficiency at the lower EGR rate but increased the BMEP and the brake thermal efficiency at the higher EGR rate. The BMEP decreased with an increase in the EGR rate

and the brake thermal efficiency increased at first and then decreased with an increase in the EGR rate. The NO

concentration decreased with an incre

ase in the EGR rate and increased with the hydrogen fraction. The HC emission increased with the EGR rate and decreased with an increase in the hydrogen fraction. The CO emission changed slightly with the EGR rate and decreased with an increase in the hydrogen fraction. In addition

the variation coefficient of indicated mean effective pressure C

imep

increased with the EGR rate

and the hydrogen addition could reduce the C

imep

more effectively for late injection..

关键词

Keywords

references

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LIU Liangxin, HUANG Zuohua, JIANG Deming, et al. Combustion and emission characteristics of a direct-injection engine fuelled with natural gas/hydrogen blends under various ignition timing [J]. Transaction of CSICE, 2005, 23(5): 469-474.

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ALGER T, GINGRICH J, MANGOLD B. The effect of hydrogen enrichment on EGR tolerance in spark ignited engine, SAE 2007-01-0475[R].Warrendale, PA, USA: SAE, 2007.

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