Study on the Effects of the In-Cylinder EGR Stratification on NOx and Soot Emissions in Diesel Engines

2011 ◽  
Author(s):  
Wonah Park ◽  
Sangyul Lee ◽  
Seungmok Choi ◽  
Kyoungdoug Min ◽  
Hoimyung Choi ◽  
...  
Keyword(s):  
Diesel Engines ◽  
Soot Emissions

Insights on postinjection-associated soot emissions in direct injection diesel engines

2008 ◽  
Vol 154 (3) ◽  
pp. 448-461 ◽  
Author(s):  
Jean Arrègle ◽  
José V. Pastor ◽  
J. Javier López ◽  
Antonio García
Keyword(s):  
Diesel Engines ◽  
Direct Injection ◽  
Soot Emissions

scholarly journals Possibilities of Simultaneous In-Cylinder Reduction of Soot andNOxEmissions for Diesel Engines with Direct Injection

2008 ◽  
Vol 2008 ◽  
pp. 1-13 ◽  
Author(s):  
U. Wagner ◽  
P. Eckert ◽  
U. Spicher
Keyword(s):  
Nitrogen Oxide ◽  
Diesel Engines ◽  
Fuel Injection ◽  
Soot Formation ◽  
Soot Oxidation ◽  
The Other ◽  
Injection System ◽  
Nitrogen Oxide Emissions ◽  
Injection Strategy ◽  
Soot Emissions

Up to now, diesel engines with direct fuel injection are the propulsion systems with the highest efficiency for mobile applications. Future targets in reducingCO2-emissions with regard to global warming effects can be met with the help of these engines. A major disadvantage of diesel engines is the high soot and nitrogen oxide emissions which cannot be reduced completely with only engine measures today. The present paper describes two different possibilities for the simultaneous in-cylinder reduction of soot and nitrogen oxide emissions. One possibility is the optimization of the injection process with a new injection strategy the other one is the use of water diesel emulsions with the conventional injection system. The new injection strategy for this experimental part of the study overcomes the problem of increased soot emissions with pilot injection by separating the injections spatially and therefore on the one hand reduces the soot formation during the early stages of the combustion and on the other hand increases the soot oxidation later during the combustion. Another method to reduce the emissions is the introduction of water into the combustion chamber. Emulsions of water and fuel offer the potential to simultaneously reduceNOxand soot emissions while maintaining a high-thermal efficiency. This article presents a theoretical investigation of the use of fuel-water emulsions in DI-Diesel engines. The numerical simulations are carried out with the 3D-CFD code KIVA3V. The use of different water diesel emulsions is investigated and assessed with the numerical model.

Semi-physical NOx and soot model for CI engines: Study of its calibration procedure and portability

2020 ◽  
Vol 234 (14) ◽  
pp. 3414-3428
Author(s):  
Hassan Karaky ◽  
Pierre Marty ◽  
Xavier Tauzia ◽  
Alain Maiboom ◽  
Gilles Mauviot
Keyword(s):  
Sensitivity Analysis ◽  
Physical Model ◽  
Diesel Engines ◽  
Calibration Procedure ◽  
Original Analysis ◽  
Soot Emissions ◽  
Ci Engines ◽  
Soot Model

A series of papers has previously presented a semi-physical model for NOx and soot emissions prediction for diesel engines. In this paper, the work is continued with an original analysis of the model’s capacity to be ported to a new engine and a sensitivity analysis of the number of training points required to obtain the desired accuracy. These two aspects are rarely developed in similar studies.

scholarly journals Sensitivity of combustion noise and NOx and soot emissions to pilot injection in PCCI Diesel engines

2013 ◽  
Vol 104 ◽  
pp. 149-157 ◽  
Author(s):  
A.J. Torregrosa ◽  
A. Broatch ◽  
A. García ◽  
L.F. Mónico
Keyword(s):  
Diesel Engines ◽  
Combustion Noise ◽  
Pilot Injection ◽  
Soot Emissions
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