作者: Long Wang , Zhanming Chen , Tiancong Zhang , Ke Zeng
DOI: 10.1016/J.FUEL.2019.115799
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摘要: Abstract To investigate the effect of excess air/fuel ratio (λ) and methanol addition on combustion characteristics, performance, emissions, a heavy-duty, turbo-charged, six-cylinder natural gas engine was modified into gas/methanol dual-fuel with port-fuel injection system. The speed maintained at constant value 1600 r/min, load kept low brake mean effective pressure 0.387 MPa, spark timing near optimized thermal efficiency (ηet). results indicated that decreased flame development period (CA0–10) propagation (CA10–90), leading to an increased ηet equivalent specific fuel consumption (BSFC), along reduced total hydrocarbon emissions. Additionally, increase in λ, burning rate owing energy density temperature pressure. However, BSFC lean-burn condition. emissions while nitrogen oxide λ. condition can be by adding methanol, particularly when λ = 1.5 1.6. capability improved methanol.