Simultaneous reduction in the exhaust emissions by a high exhaust gas recirculation ratio in a dimethyl-ether-fuelled diesel engine at a low-load operating condition

2012 ◽  
Vol 226 (8) ◽  
pp. 1130-1142 ◽  
Author(s):  
Su Han Park ◽  
Junepyo Cha ◽  
Sungwook Park ◽  
Chang Sik Lee
Keyword(s):  
Diesel Engine ◽  
Dimethyl Ether ◽  
Exhaust Gas Recirculation ◽  
Exhaust Emissions ◽  
Exhaust Gas ◽  
Simultaneous Reduction ◽  
Operating Condition ◽  
Low Load ◽  
Gas Recirculation

scholarly journals Combustion and Emission Enhancement of a Spark Ignition Two-Stroke Cycle Engine Utilizing Internal and External Exhaust Gas Recirculation Approach at Low-Load Operation

Energies ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 609 ◽  
Author(s):  
Amin Mahmoudzadeh Andwari ◽  
Apostolos Pesyridis ◽  
Vahid Esfahanian ◽  
Mohd Said
Keyword(s):  
Weight Ratio ◽  
Exhaust Gas Recirculation ◽  
Exhaust Emissions ◽  
Combustion Stability ◽  
Average Charge ◽  
Exhaust Gas ◽  
Low Load ◽  
Gas Recirculation ◽  
Charge Temperature ◽  
Stroke Cycle

Two-stroke cycle engines have always been prominent due to their distinctive advantage incorporating high power-to-weight ratio, however the drawbacks are poor combustion efficiency, fuel short-circuiting and excessive emission of uHC and CO. These problems are apparent at low-load and speed regions and are the major obstacle to their global acceptance. The deficiencies can be addressed by increasing the in-cylinder average charge temperature employing Exhaust Gas Recirculation (EGR). An experimental study is conducted to investigate the influence of utilizing EGR techniques, including Internal and External EGR, on combustion misfiring occurrence, combustion stability and exhaust emissions using a single cylinder two-stroke SI engine at idling, low and mid-load conditions. From the results, it is observed since the average in-cylinder charge temperature is increased, due to utilizing EGRs, engine’s low and mid-load irregular combustions (misfire) and exhaust emissions are remarkably supressed and almost all of misfire cycles eliminated depending on the percentage of EGRs. In terms of combustion stability, it is agreed in general the application of EGRs improves the cyclic variation of IMEP, Pmax and CA10 compared to conventional operation. However, applying Ex-EGR compared to In-EGR will deteriorate cyclic variability of IMEP and CA10.

scholarly journals Effect of Exhaust Gas Recirculation and Injection Pressure on Exhaust Emissions from a Diesel Engine.

2000 ◽  
Vol 66 (646) ◽  
pp. 1578-1585
Author(s):  
Takuji ISHIYAMA ◽  
Makoto IKEGAMI ◽  
Koichiro NAKATANI ◽  
Tomohiro OHTANI ◽  
Shunsaku NAKAI
Keyword(s):  
Diesel Engine ◽  
Injection Pressure ◽  
Exhaust Gas Recirculation ◽  
Exhaust Emissions ◽  
Exhaust Gas ◽  
Gas Recirculation
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