The Control of Diesel Combustion by Means of Exhaust Gas Recirculation

1985 ◽  
Author(s):  
Seiichi Shiga ◽  
Hideharu Ehara ◽  
Takao Karasawa ◽  
Toshio Kurabayashi
Keyword(s):  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Diesel Combustion ◽  
Gas Recirculation

In-cylinder stratification of external exhaust gas recirculation for controlling diesel combustion

2009 ◽  
Vol 11 (1) ◽  
pp. 1-15 ◽  
Author(s):  
T Fuyuto ◽  
M Nagata ◽  
Y Hotta ◽  
K Inagaki ◽  
K Nakakita ◽  
...  
Keyword(s):  
Exhaust Gas Recirculation ◽  
Exhaust Gas ◽  
Diesel Combustion ◽  
Gas Recirculation

In-cylinder studies of the effects of CO2 in exhaust gas recirculation on diesel combustion and emissions

2000 ◽  
Vol 214 (4) ◽  
pp. 405-419 ◽  
Author(s):  
H Zhao ◽  
J Hu ◽  
N Ladommatos
Keyword(s):  
High Speed ◽  
Measurement Techniques ◽  
Dilution Effect ◽  
Exhaust Gas Recirculation ◽  
Exhaust Emission ◽  
Exhaust Gas ◽  
Diesel Combustion ◽  
Combustion Chambers ◽  
Emission Analysis ◽  
Gas Recirculation

This paper reports the results of the effects of CO2 in exhaust gas recirculation (EGR) on diesel combustion and emissions. The experiments were carried out on a specially designed single-cylinder diesel engine. In-cylinder measurements were obtained from the optically accessible swirl chamber using high-speed shadowgraphy, the two-colour method and laser extinction. Furthermore, in-cylinder pressure measurements from the combustion chambers were used to derive the heat release rates during combustion. Two experiments were carried out on the effects of CO2 on diesel combustion and pollutant formation. In the first series of experiments, CO2 was used to replace some of the oxygen in the intake mixture, which simulated the dilution effect of conventional EGR. This so-called replacement EGR method was characterized by the typical NOx and smoke trade-off, where NOx reduction was accomplished at the expense of exhaust smoke. In the second series of tests, CO2 was added to the intake charge so that the oxygen concentration in the combustion chamber was not affected. In this additional EGR method, CO2 was found to suppress both NOx and smoke emissions. The mechanisms of these two different EGR modes on diesel combustion and emissions were examined using the above in-cylinder measurement techniques and exhaust emission analysis.

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