Journal ArticleDOI
The operation of a turbulence chamber diesel engine with LPG fumigation for exhaust emissions control
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In this article, an experimental study was conducted to evaluate the use of liquefied petroleum gas (LPG) as a secondary fuel for a Ricardo E-6, naturally aspirated, four-stroke diesel engine having a turbulence combustion chamber (indirect injection).Abstract:
An experimental study is conducted to evaluate the use of liquefied petroleum gas (LPG) as a secondary fuel for a Ricardo E-6, naturally aspirated, four-stroke diesel engine having a turbulence combustion chamber (indirect injection). The gaseous LPG is introduced together with the aspirated air (fumigation) at various proportions with respect to the diesel fuel which constitutes the main part. The influence of fuel feed ratios (LPG/diesel), in a vast range of loads, on fuel consumption, pressure diagrams, exhaust smokiness and exhaust gas emissions (nitrogen oxides, hydrocarbons and carbon monoxide) is investigated, the baseline being the single diesel fuel operation. The study for this type of engine, which has not being reported in the literature, shows a promise of the present method and reveals that above 60 per cent of maximum load the whole effect is beneficial concerning specific fuel consumption and smoke reduction. The examination of gaseous pollutant levels shows an involved relation with respect to load and fuel proportions. The best results (coupled to acceptable cylinder pressure levels) is obtained at a diesel fuel substitution value of 75% of maximum load, with an LPG mass fraction in the range 10 to 15%.read more
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Journal ArticleDOI
Comparative performance and emissions study of a direct injection Diesel engine using blends of Diesel fuel with vegetable oils or bio-diesels of various origins
Constantine D. Rakopoulos,Kimon A. Antonopoulos,Dimitrios C. Rakopoulos,Dimitrios T. Hountalas,Evangelos G. Giakoumis +4 more
TL;DR: In this article, an extended experimental study is conducted to evaluate and compare the use of various Diesel fuel supplements at blend ratios of 10/90 and 20/80, in a standard, fully instrumented, four stroke, direct injection (DI), Ricardo/Cussons ‘Hydra’ Diesel engine located at the authors' laboratory.
Journal ArticleDOI
Effects of ethanol-diesel fuel blends on the performance and exhaust emissions of heavy duty DI diesel engine
TL;DR: In this article, an experimental investigation is conducted to evaluate the effects of using blends of ethanol with conventional diesel fuel, with 5% and 10% (by vol.) ethanol, on the performance and exhaust emissions of a fully instrumented, six-cylinder, turbocharged and after-cooled, heavy duty, direct injection (DI), Mercedes-Benz engine, installed at the authors’ laboratory, which is used to power the mini-bus diesel engines of the Athens Urban Transport Organization sub-fleet with a view to using bio-ethanol produced from Greek feedstock.
Journal ArticleDOI
Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol-diesel fuel blends
TL;DR: In this article, an experimental study was conducted to evaluate the effects of using blends of ethanol with conventional diesel fuel, with 5%, 10% and 15% (by vol.) ethanol, on the combustion and emissions of a standard, fully instrumented, four-stroke, high-speed, direct injection (HSDI), "Hydra" diesel engine located at the authors' laboratory.
Journal ArticleDOI
Performance and emissions of bus engine using blends of diesel fuel with bio-diesel of sunflower or cottonseed oils derived from Greek feedstock
Constantine D. Rakopoulos,Dimitrios C. Rakopoulos,Dimitrios T. Hountalas,Evangelos G. Giakoumis,E.C. Andritsakis +4 more
TL;DR: In this paper, an experimental investigation is conducted to evaluate the use of sunflower and cottonseed oil methyl esters (bio-diesels) of Greek origin as supplements in the diesel fuel at blend ratios of 10/90 and 20/80, in a fully instrumented, six-cylinder, turbocharged and after-cooled, direct injection (DI), Mercedes-Benz, mini-bus diesel engine installed at the authors' laboratory.
Journal ArticleDOI
Multi-zone modeling of combustion and emissions formation in DI diesel engine operating on ethanol–diesel fuel blends
Constantine D. Rakopoulos,Kimon A. Antonopoulos,Dimitrios C. Rakopoulos,Dimitrios T. Hountalas +3 more
TL;DR: In this article, a multi-zone model for calculation of the closed cycle of a direct injection (DI) diesel engine is applied for the interesting case of its operation with ethanol-diesel fuel blends, the ethanol (bio-fuel) being considered recently as a promising extender to petroleum distillates.
References
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Book
Emissions from Combustion Engines and Their Control
TL;DR: In this article, a standard text for the automotive industry explains in detail the fundamentals of emission formation and control for gasoline and diesel engines, which can be applied to other combustion systems, such as gas turbines and stationary power plants.
Proceedings ArticleDOI
Propane Fumigation in a Direct Injection Type Diesel Engine
TL;DR: In this paper, an experimental study was conducted to evaluate the use of propane and natural gas as fuels for diesel engines, and experiments were conducted by injecting different quantities of pilot diesel fuel at a fixed injection timing.
Journal ArticleDOI
The Effect of Auxiliary Fuels on the Smoke-limited Power Output of Diesel Engines
TL;DR: The effect of octane number of the auxiliary fuel is important, maximum smoke-limited powers being obtained with the higher octane-number fuels, while with fuels of low octane numbers, power increase may be limited by the occurrence of knocking when the air-fuel ratio is too low as discussed by the authors.