Effect of dimethoxy-methane and exhaust gas recirculation on combustion and emission characteristics of a direct injection diesel engine

Ruijun Zhu, Xibin Wang, Haiyan Miao, Xiaofeng Yang, Zuohua Huang

Research output: Contribution to journalArticle

Abstract

The effect of fuel constituents and exhaust gas recirculation (EGR) on combustion characteristics, fuel efficiency and emissions of a direct injection diesel engine fueled with diesel-dimethoxymethane (DMM) blends was investigated experimentally. Three diesel-DMM blended fuels containing 20%, 30% and 50% by volume fraction of DMM, corresponding to 8.5%, 12.7% and 21.1% by mass of oxygen in the blends, were used. By the use of DMM, it is observed that CO and smoke emissions as well as the total number and mass concentration of particulate reduce significantly, while HC emissions and particulate number with lower geometric mean diameters (Di < 0.039 μm) increase slightly. For each fuel, there is an increase of ignition delay whereas a decrease of cylinder pressure and heat release rate in the premixed combustion phase when the diesel engine was operated with EGR system. The brake thermal efficiency fluctuates at small EGR ratio, while decreases with the further increase of EGR ratio. With an increase of EGR ratio, NOx emission is reduced at the cost of increased smoke, HC and CO emissions as well as the total number and mass of particulates for each fuel.

Original languageEnglish
Pages (from-to)1731-1737
Number of pages7
JournalFuel
Volume90
Issue number5
DOIs
Publication statusPublished - May 2011
Externally publishedYes

Fingerprint Dive into the research topics of 'Effect of dimethoxy-methane and exhaust gas recirculation on combustion and emission characteristics of a direct injection diesel engine'. Together they form a unique fingerprint.

  • Cite this