An Experimental Investigation of In-Cylinder Flow Motion Effect on Dual-Fuel Premixed Compression Ignition Characteristics

2020 ◽  
Author(s):  
Sanghyun Chu ◽  
Hyungjin Shin ◽  
Kihong Kim ◽  
Sunyoung Moon ◽  
Kyoungdoug Min ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Dual Fuel ◽  
Compression Ignition ◽  
Flow Motion ◽  
Motion Effect ◽  
Ignition Characteristics ◽  
Cylinder Flow

Experimental investigation of direct injection dual fuel of n-butanol and biodiesel on Intelligent Charge Compression Ignition (ICCI) Combustion mode

2020 ◽  
Vol 266 ◽  
pp. 114884 ◽  
Author(s):  
Wenbin Zhao ◽  
Zilong Li ◽  
Guan Huang ◽  
Yaoyuan Zhang ◽  
Yong Qian ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Direct Injection ◽  
Dual Fuel ◽  
Compression Ignition ◽  
Combustion Mode

Mapping the combustion modes of a dual-fuel compression ignition engine

2021 ◽  
pp. 146808742110183
Author(s):  
Jonathan Martin ◽  
André Boehman
Keyword(s):  
Direct Injection ◽  
Fuel Combustion ◽  
Dual Fuel ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Combustion Modes ◽  
Si Engines ◽  
Dual Fuel Combustion ◽  
Soot Emissions ◽  
Ci Engines

Compression-ignition (CI) engines can produce higher thermal efficiency (TE) and thus lower carbon dioxide (CO2) emissions than spark-ignition (SI) engines. Unfortunately, the overall fuel economy of CI engine vehicles is limited by their emissions of nitrogen oxides (NOx) and soot, which must be mitigated with costly, resource- and energy-intensive aftertreatment. NOx and soot could also be mitigated by adding premixed gasoline to complement the conventional, non-premixed direct injection (DI) of diesel fuel in CI engines. Several such “dual-fuel” combustion modes have been introduced in recent years, but these modes are usually studied individually at discrete conditions. This paper introduces a mapping system for dual-fuel CI modes that links together several previously studied modes across a continuous two-dimensional diagram. This system includes the conventional diesel combustion (CDC) and conventional dual-fuel (CDF) modes; the well-explored advanced combustion modes of HCCI, RCCI, PCCI, and PPCI; and a previously discovered but relatively unexplored combustion mode that is herein titled “Piston-split Dual-Fuel Combustion” or PDFC. Tests show that dual-fuel CI engines can simultaneously increase TE and lower NOx and/or soot emissions at high loads through the use of Partial HCCI (PHCCI). At low loads, PHCCI is not possible, but either PDFC or RCCI can be used to further improve NOx and/or soot emissions, albeit at slightly lower TE. These results lead to a “partial dual-fuel” multi-mode strategy of PHCCI at high loads and CDC at low loads, linked together by PDFC. Drive cycle simulations show that this strategy, when tuned to balance NOx and soot reductions, can reduce engine-out CO2 emissions by about 1% while reducing NOx and soot by about 20% each with respect to CDC. This increases emissions of unburnt hydrocarbons (UHC), still in a treatable range (2.0 g/kWh) but five times as high as CDC, requiring changes in aftertreatment strategy.

scholarly journals Ignition characteristics of dual-fuel methane-n-hexane-oxygen-diluent mixtures in a rapid compression machine and a shock tube

Fuel ◽  
2019 ◽  
Vol 249 ◽  
pp. 379-391 ◽  
Author(s):  
Yizhuo He ◽  
Yingdi Wang ◽  
Claire Grégoire ◽  
Urszula Niedzielska ◽  
Remy Mével ◽  
...  
Keyword(s):  
Shock Tube ◽  
Dual Fuel ◽  
Rapid Compression Machine ◽  
Rapid Compression ◽  
Ignition Characteristics
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