Numerical Study on the Effects of Pilot Diesel Quantity Coupling EGR in a High Pressure Direct Injected Natural Gas Engine

Yu, Sheng; Wei, Lijiang; Zhou, Siyuan; Lu, Xiuwei; Huang, Wenqing

doi:10.1080/00102202.2022.2060040

Cited by 5 publications

(1 citation statement)

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“…Finding clean and abundant energy as a substitute for traditional fossil fuels will help reduce pollutant emissions and alleviate the energy crisis. Many alternative fuels, such as biodiesel (Tian et al, 2021), natural gas Yu et al, 2024) , ethanol (Ge et al, 2022), and methanol (Gong et al, 2021;Liu et al, 2023;Tian et al, 2022) have been extensively studied in internal combustion engines and achieved some results.…”

Section: Introductionmentioning

confidence: 99%

Effects of pilot injector specifications on combustion and emissions of diesel-methanol dual-fuel direct injection engine

LV,

WEI,

SONG

et al. 2024

JTST

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Diesel-ignited methanol direct injection engine can achieve high methanol substitution rate and low emissions. The effects of pilot diesel injector specifications, including hole number and installation location, on the combustion and emissions of a diesel-methanol dual-fuel direct injection engine were investigated in this study. The results show that increasing the number of diesel injection holes reduces the proportion of methanol premixed combustion, which is beneficial to reducing ringing intensity (RI) and reducing pollutant emissions. Different pilot injector types and installation positions have a significant impact on the combustion mode of methanol, but have little impact on fuel economy. The equivalent indicated specific fuel consumption (EISFC) is below 165g/kWh in all cases. When the diesel ignition area deviates from the center of the cylinder, methanol mainly undergoes premixed combustion, and NO X , HC, and CO emissions increase significantly. When the diesel combustion area is located in the center of the cylinder, methanol mainly undergoes diffusion combustion, with lower RI and less pollutant emissions.

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