نتایج جستجو برای: egr exhaust gas recirculation

تعداد نتایج: 257798  

2014
K.Dinesh Kumar

Abstract: As day by day there is technological development seen all around world, the research work is progressing but the resources involved in them are depleting rapidly .The demand of resources and fuels for the technological development is increasing day by day. In order to keep the pace of development high there is a need to think about some alternate fuel with better efficiency which woul...

When looking at the effects of diesel engine exhaust on the environment, it is important to first look at the composition of the exhaust gases. Over 99.5% of the exhaust gases are a  combination of  nitrogen, oxygen, carbon dioxide, and water. With the exception of carbon  dioxide, which contributes about  5% of the total volume, the diesel engine exhaust consists of  elements which are part of...

2006
Shreekant Gayaka Ray W. Herrick Peter H. Meckl

The combined use of Variable Geometry Turbine (VGT) and Exhaust Gas Recirculation (EGR) gives us an opportunity to reduce emissions, without compromising the need to generate more power. In the present work, a multivariable approach is used to tackle the EGR-VGT actuator control problem. A linear multivariable controller is designed using Lyapunov’s Indirect Method, based on the Jacobian matrix...

2015
Sergey Samokhin Kai Zenger

This work investigates a novel turbocharged EGR system installed on a laboratory marine engine. A problem of recirculation of high and stable portion of exhaust gas in marine engines is addressed. Although conventional EGR systems have been extensively presented in research papers, the setup shown in this paper has not been well described. Therefore, we develop a mean-value model of the system ...

2013

Modern engines are cooled by complex air and liquid cooling systems that manage the flow of high temperature air, gases and coolants, and house critical thermal management components. Plastics, many supplied by DuPont, are playing an increasingly important role in key cooling system parts including thermostat and heater housings, outlet and inlet ports, valves, cross-overs, coolant pumps, water...

2002
Anna Stefanopoulou Hakan Yilmaz David Rausen

ABSTRACT Stringent NOx and particulate emission constraints require high levels of exhaust gas recirculation. In this paper we model and analyze a Variable Valve Timing methodology that in steady-state achieves large levels of internal Exhaust Gas Recirculation (iEGR) or residual charge in Compression Ignition Direct Injection (CIDI) engines. Current external Exhaust Gas Recirculation (eEGR) te...

2013
Seung Hyun Yoon Seung Chul Han Chang Sik Lee

This study investigated the effects of high exhaust gas recirculation (EGR) rates on dimethyl ether (DME) fuel combustion performance, exhaust emissions and particle emission characteristics in a small direct injection diesel engine under various injection timings. To examine the effect of EGR and injection timings, the experiment was performed under high EGR rates (0%, 30%, 50%) and injection ...

2013
F. Castillo E. Witrant V. Talon L. Dugard

This paper describes a low-pressure exhaust gas recirculation (LP-EGR) mass flow rate estimation method and a robust air mass fraction observer for a Diesel engine with dualloop EGR system. Both observers operate simultaneously eliminating the need for pressure measurement upstream the LP-EGR valve. A sliding mode observer is designed to estimate the LP-EGR mass flow rate using the standard sen...

Journal: :Energies 2023

The paper presents a simulation investigation of using molten carbonate fuel cell (MCFC) combined with exhaust gas recirculation (EGR) or selective (SEGR) to reduce CO2 emission from the turbine in order cope climate change problem. EGR SEGR can be used concentrate low-concentration exhausts. concentration is then raised further by adding MCFC’s cathode. suggested gas–steam cycle system paired ...

2008
Johan Molin Johan Wahlström Tomas Carlsson Lars Eriksson

Correlations between the coefficient of variations (COV) of ion current integrals and COV of indicated mean effective pressure (IMEP) are investigated. The investigations are made to see if there is a possibility to use ion sense technique for closed loop combustion control to maximize Exhaust Gas Recirculation (EGR) level with remaining combustion stability. The engine studied in this thesis i...

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