Soot And No Subscript X Emissions And Combustion Characteristics Of Direct Injection Diesel Engine
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Soot And No Subscript X Emissions And Combustion Characteristics Of Direct Injection Diesel Engine
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Author : Messiha Todary Saad
language : en
Publisher:
Release Date : 1993
Soot And No Subscript X Emissions And Combustion Characteristics Of Direct Injection Diesel Engine written by Messiha Todary Saad and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
Soot And No X Emissions And Combustion Characteristics Of Low Heat Rejection Direct Injection Diesel Engines
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Author :
language : en
Publisher:
Release Date : 1994
Soot And No X Emissions And Combustion Characteristics Of Low Heat Rejection Direct Injection Diesel Engines written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Performance and emissions data were gathered on a normally aspirated single cylinder DI engine with various combinations of ceramic coatings installed. Thin ceramic thermal barrier coatings were applied to the piston crown and bowl, the head and valves, and the cylinder liner. The coated piston and head were run singly and in combination with the cylinder liner to investigate the effects of these different coated surfaces on emissions and performance. Coating the piston crown alone results in generally lower cylinder pressure, lower brake specific fuel consumption and lower NO(x) emission compared to the baseline engine. Soot emission is typically increased below 2000 RPM and decreased above 2000 RPM. Coating the head alone reduces cylinder pressure, but generally increases specific fuel consumption and NO(x) and soot emission. The KIVA-II code was used to model the Hydra engine with the thermal coatings. The computer modeling has led to an understanding of the effect of coating the piston on NO production. The hotter piston crown warms the intake air, shortening ignition delay and decreasing the ratio of premixed to diffusion combustion, ultimately resulting III lower peak cylinder temperature and reduced NO. The KIVA-II results agree reasonably well with the experimental data for cylinder pressure and NO and soot emission. Diesel combustion, Low heat rejection engines, NO(x) Emission, Soot emission, Thermal barrier coatings.
Performance Combustion Characteristics And Exhaust Emission Of A Direct Injection Diesel Engine Using Water Oil Emulsions As Fuel
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Author : E. M. Afify
language : en
Publisher:
Release Date : 1985
Performance Combustion Characteristics And Exhaust Emission Of A Direct Injection Diesel Engine Using Water Oil Emulsions As Fuel written by E. M. Afify and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with categories.
A CLR single cylinder diesel engine is used to determine the effect of air content in the emulsified fuel on the performance, exhaust emissions and ignition delay of diesel engines. The experiments were conducted using diesel fuel no. 2 and JP-4 as baseline fuels and emulsions containing 15%, 30% and 45% water by volume. The air charge temperature was varied from 88 F to 302 F. The effects associated with use of the emulsions on performance, ignition delay and exhaust emissions were determined by making detailed measurements of fuel consumption, engine operating parameters and exhaust emissions. The results showed that slight improvement in Brake Specific Fuel Consumption (BSFC) was observed when emulsions with low water content were used at high speeds. For high water content emulsions, the BSFC increased. Heating the intake air increased the BSFC at high engine loads and slightly improved it at low engine loads. While the ignition delay was found to increase with the increase of the water percentage in the emulsion, preheating the air charge was effective in reducing it. Although, NO sub x and soot formation were reduced effectively with the increase of water content in the emulsion, preheating the air charge adversely affected NO sub x and soot emissions. While CO and VHC emissions increased with the increase of the water content in the emulsion, increasing the intake air temperature slightly reduced carbon monoxide and unburned hydrocarbons at low loads. Keywords: Combustion; Exhaust emissions; Water/Oil emulsions.
An In Cylinder Study Of Soot And No In A Di Diesel Engine Final Report
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Author :
language : en
Publisher:
Release Date : 1995
An In Cylinder Study Of Soot And No In A Di Diesel Engine Final Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Clearly the reduction of NOx and particulate emissions remains a major challenge to Diesel engine manufacturers due to increasingly stringent emission standards in the US and other countries. The well documented NOx/particulate trade-off observed in Diesel engines makes the simultaneous reduction of both emissions particularly difficult for manufacturers to achieve. In an effort to provide an improved understanding of the fundamental processes which result in this trade-off, a program was carried out at Penn State to develop the appropriate engine facilities and laser diagnostics to permit in-cylinder studies of Diesel combustion and emissions production with the support of the Department of Energy Advanced Industrial Technology Division . This work has also been supported by the Cummins Engine Company, Lubrizol Corporation and the National Science Foundation. An optically accessible, direct injection, Diesel engine was constructed for these studies. The major objective of the, design of the engine was to maximize optical access under conditions representative of Diesel engine combustion in small bore, commercial engines. Intake air is preheated and boosted in pressure to make the in-cylinder conditions of heat release and pressure as realistic as possible. Another important objective of the design was flexibility in combustion chamber geometry to permit a variety of head and bowl geometries to be studied. In all the results reported in this report a square bowl was used to simplify the introduction of laser light sheets into the engine.
Modeling Combustion And Soot Emissions In A Small Bore Direct Injection Diesel Engine
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Author : Carl-Anders Hergart
language : en
Publisher:
Release Date : 2001
Modeling Combustion And Soot Emissions In A Small Bore Direct Injection Diesel Engine written by Carl-Anders Hergart and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Diesel motor categories.
Combustion And Emissions Of A Diesel Engine Fueled With Diesel Biodiesel Ethanol Blends And Supplemented With Intake Co2 Charge Dilution
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Author : Ho Tse
language : en
Publisher:
Release Date : 2016
Combustion And Emissions Of A Diesel Engine Fueled With Diesel Biodiesel Ethanol Blends And Supplemented With Intake Co2 Charge Dilution written by Ho Tse and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Technology categories.
This study investigated the influence of a four-cylinder naturally aspirated direct-injection diesel engine fueled with diesel-biodiesel-ethanol blended (DBE) fuels tested at a steady state speed of 1800 rev/min under different engine loads, ethanol volume and intake carbon dioxide (CO2) dilution ratios on engine performance, combustion characteristics, regulated gaseous emissions, and soot agglomerates. Overall, the experimental results indicate that DBE blends can in general improve brake thermal efficiency (BTE) and reduce nitrogen oxides (NOx), carbon monoxide (CO), CO2, volatile organic fractions, particulate mass (PM), and particulate number (PN) concentrations, while brake-specific fuel consumption (BSFC) and hydrocarbon (HC) might increase slightly. Compared with ultra-low-sulfur diesel, DBE blends can maintain a good tradeoff relationship among PM-PN-NOx. Compared with biodiesel, the blended fuels perform better in suppressing brake-specific particle number emissions (BSPN), leading to a reduction of ultrafine and nanoparticle numbers. The combined effect of DBE blends with intake CO2 dilution has marginal effects on BSFC and BTE, significantly reducing NOx emission while slightly increasing particulate emissions. On particulate characteristics, DBE blends produce soots with curved, tortuous, and disorganized nanostructures with low soot burnout temperature and strong oxidation rate favoring PM-PN reduction.
Investigations Of Advanced Injection And Combustion Strategies On Di Diesel Engine Performance And Emissions
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Author : Raouf Mobasheri
language : en
Publisher:
Release Date : 2012
Investigations Of Advanced Injection And Combustion Strategies On Di Diesel Engine Performance And Emissions written by Raouf Mobasheri and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
The main driving force behind this research was the need for cleaner and more efficient engines to meet the ever-increasing demands on the modern automobile's emissions. In recent years different studies have been carried out to analyze the combined effects of high-pressure injection, boost pressure, multiple injections, included spray angle and combustion chamber geometry. Though considerable research has shown these technologies can meet the low emission regulations, the careful optimization of the engine operating conditions is still required in order to get the full benefit of the different strategies. With these issues as motivation, the first important objective of this study was to gain a detailed understanding of the mechanisms through which fuel injection interacts with other engine parameters and influences diesel combustion and emissions, and hence to attempt to generalize the adoption of multiple injection strategies with regards to improving diesel engine performance. For this purpose, a modified parameter called "Homogeneity Factor of in-cylinder charge" (HF) was introduced and proposed as a new measure in combustion theory to analyze the combustion characteristics and air-fuel mixing process of diesel engines in more detail. The second part of this research builds upon a detail investigation on the included spray cone angle concept and explores further their use in conjunction with multiple-injection strategies in diesel engines. In addition, an investigation was performed in third phase of this research to analyze the effects of piston geometry on combustion, performance and exhaust emission characteristics. The results showed that employing a post-injection combined with a pilot injection results in reduced soot formation from diffusion combustion and enhances the soot oxidation process during the expansion stroke, resulting in decreased soot emissions, while the NOx concentration is maintained in low levels. It was also found that spray targeting is very effective for controlling the in-cylinder mixture distributions especially when it accompanied with advanced injection strategies. Moreover, the results confirmed that a narrower width of piston bowl has a higher unburned fuel air mixture region and hence results in higher soot emissions but with slightly larger piston surface area the optimum operating point could be obtained.
Modeling The Effects Of Fuel Injection Characteristics On Diesel Engine Soot And Nox Emissions
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Author : M. A. Patterson
language : en
Publisher:
Release Date : 1994
Modeling The Effects Of Fuel Injection Characteristics On Diesel Engine Soot And Nox Emissions written by M. A. Patterson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Automobiles categories.
Intake Flow Effects On Combustion And Emissions In A Diesel Engine
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Author : Tina R. Fuchs
language : en
Publisher:
Release Date : 1997
Intake Flow Effects On Combustion And Emissions In A Diesel Engine written by Tina R. Fuchs and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Diesel Combustion And Emissions
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Author : Society of Automotive Engineers
language : en
Publisher:
Release Date : 1981
Diesel Combustion And Emissions written by Society of Automotive Engineers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Air categories.
