Soot Formation, Oxidation and Its Mechanism in Different Combustion Systems and Smoke Emission Pattern in DI Diesel Engines

1991 ◽  
Author(s):  
Mei Ning ◽  
Zhu Vuan-Xian ◽  
Song Zhen-Huan ◽  
Hu Guo-dong
Keyword(s):  
Diesel Engines ◽  
Soot Formation ◽  
Smoke Emission ◽  
Emission Pattern ◽  
Combustion Systems

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.

Soot Formation and Oxidation in Diesel Engines

1980 ◽  
Author(s):  
H. Hiroyasu ◽  
M. Arai ◽  
K. Nakanishi
Keyword(s):  
Diesel Engines ◽  
Soot Formation

scholarly journals Improvement in Performance and Emission Using Coconut Oil as a Diesel Substitute

1970 ◽  
Vol 5 ◽  
pp. 62-65
Author(s):  
Rajesh Kumar Pandey ◽  
A Rehman ◽  
R M Sarviya ◽  
Savita Dixit
Keyword(s):  
Methyl Ester ◽  
Tropical Forests ◽  
Vegetable Oils ◽  
Diesel Engines ◽  
Chemical Process ◽  
Coconut Oil ◽  
Smoke Emission ◽  
Large Measure ◽  
Fuel Injectors ◽  
Performance And Emission

Diesel engines, unlike their petrol counterparts, are omnivorous in fuel consumption habits and can easily run on vegetable oils without any major changes in the engine. Using raw oils in diesel engines led to such problems as the sticking of fuel injectors and piston rings due to choking, and the thickening of lubricating oils, resulting in clogging of filters, but these were overcome in a large measure by pre-conditioning of the fuel by a chemical process using methanol or ethanol called ‘Transesterification'. Coconut oil can be adapted as additive fuel for the existing bio diesel engines without major modifications. If diesel engines turn vegetarian in our country, which has a great potential for producing vegetable oils from the evergreen tropical forests and plantations, it will be a big achievement in terms of reducing the sky-rocketing petroleum bills! Edible coconut oil is subjected to Transesterification process to reduce its viscosity and resulting coconut methyl ester known as biodiesel used in 5 H.P. Single cylinder diesel engines. Result shows that heated B-100 blend gave better performance and produced lower smoke emission than other fuel blends.Key words: C.I. engine; Diesel; Biodiesel; Coconut oil; Engine emissionsDOI: 10.3126/hn.v5i0.2494Hydro Nepal Vol. 5, July 2009 Page:62-65

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