Introduction to fuel systems exhaust gas emissions if the engine burns the chemical correct mixture the following gases are produced. Exhaust gas recirculation, ask latest information, exhaust gas recirculation abstract, exhaust gas recirculation report, exhaust gas recirculation presentation pdf,doc, ppt, exhaust gas recirculation technology discussion, exhaust gas recirculation paper presentation details, exhaust gas recirculation, ppt, pdf, report, presentation, source code, abstract, seminar, project idea, seminar topics. The test differs for different regions and also for different types of vehicles. Exhaust gas re circulation presentation 1 free download as powerpoint presentation. Files are available under licenses specified on their description page. Circulation and gas exchange circulation and gas exchange oxygen transport the respiratory pigment of almost all vertebrates is the protein hemoglobin, contained in the erythrocytes like all. And what is the ideal fuel to air mixture for a petrol engine. Selective catalytic reduction and exhaust gas recirculation. Local exhaust ventilation is the property of its rightful owner. Exhaust gas recirculation high performance academy. Effect of exhaust gas re circulation on vehicular emission. Exhaust gases from vehicles includes co,co2,hc,nox. Jun 20, 2012 principle of exhaust gas recirculation egr partinfo1.
The addition of this inert or noncombustible exhaust gas limits the peak combustion temperatures to a range that is below 2500 f, where the formation of nitrogen oxide nox is known to occur. Seminar on exhaust gas recirculation full report pptpdf. Principle of operation in exhaust gas recirculation, some of the exhaust gas is drawn off from the exhaust system, cooled and redirected back into the cylinders see figure 2. Some of the oxygen is used to burn the fuel during the combustion process and the rest is supposed to just pass through unreacted. Exhaust gas recirculation ppt final free download as powerpoint presentation. Exhaustgas recirculation is a technique to control oxides of nitrogen, which are formed by the chemical reaction of nitrogen and oxygen at high temperatures during combustion. Exhaust gas recirculation is an effective method for no x control. This paper deals with the use of an exhaust gas recirculation egr system on a given spark ignition engine for studying the performance and emission characteristics. Daily spot checks are also required to verify performance. An outlet for the gases is provided on the opposite side of the nozzle.
Exhaust gas recirculation, ask latest information, exhaust gas recirculation abstract,exhaust. Allows burned exhaust gases to enter the engine intake manifold. But you can definitely use the heat and the pressure of the exhaust gas to turn turbines and produce b. Exhaust gas recirculation presentation n ox exhaust gas.
Com copyright 2004 click your tool bar back button to exit how to navigate. It has proven to be very useful and it is being modified further to attain better standards. The purpose of this scheme is to demonstrate compliance through continuous electronic monitoring. Effect of exhaust gas re circulation on vehicular emission free download as powerpoint presentation. How does exhaust gas recirculation reduces nox emission. Effect of exhaust gas recirculation egr on performance.
Other than what most people believe, this is not done to reburn dangerous exhaust gases. Gas laws powerpoint lesson strongsville city schools. Impacts of exhaust gas recirculation egr on the natural gas combined cycle integrated with chemical absorption co 2 capture technology december 2011 energy procedia 4. Exhaust gas recirculation egr is an emission control technology allowing significant nox emission reductions from most types of diesel engines. Recirculated exhaust gas displaces fresh air entering the combustion chamber with carbon dioxide and water. Exhaust gas recirculation in medium speed gas engines. How does exhaust gas recirculation reduces nox emission in. Feb 11, 2015 exhaust gasrecirculationinfourstrokeengine 1. This dilutes the o 2 in the incoming air stream and provides gases inert to combustion to act as absorbents of combustion heat to reduce. The use of exhaust gas recirculation to optimize fuel economy and minimize emissions in engines operating on e85 fuel. What are the benefits and limitations of exhaust gas re. Internal engine technology for reducing nitrogen oxide emissions mtu 3 fig. Performance and emission characteristics of exhaust gas.
When burning coal andor waste materials, hydrogen chloride and hydrogen fluoride may be present in the. Exhaust gas recirculation, in internal combustion engines. Egrsystems for diesel engines 2 pass certain emission limits in order to get approved for sale. Exhaust gas recirculation exhaust gas recirculation is an efficient method to reduce nox emissions from the engine. Air is a mixture of gases and it contains approximately 78% nitrogen and 21% oxygen. Exhaust gas recirculation ppt final n ox exhaust gas scribd. This can be caused by unburned fuel in the exhaust. Emission causes effects and control pdf ppt seminar report.
Download your presentation papers from the following links. The template is free and also can be used for gas station presentations or something related with energy. For which, vehicular traffic is a major contributor. Major problem environmental pollution is faced by todays world. The mixing of the injected urea in the exhaust stream must be complete and atomized adequate to thoroughly interact with exhaust chemistry. Exhaust gas recirculation general tuning discussion. This involves recirculating a controllable proportion of the engines exhaust back into the intake air.
Circulation and gas exchange oxygen transport the respiratory pigment of almost all vertebrates is the protein hemoglobin, contained in the. Ppt exhaust gas recirculation egr powerpoint presentation. Scribd is the worlds largest social reading and publishing site. Exhaust gas recirculation is an effective method for nox control. Contributing factors include a rich fuel mixture, ignition misfire a fouled spark plug or bad plug wire or a burned exhaust valve that leaks compression. An exhaust gas analyser or exhaust co analyser is an instrument for the measurement of carbon monoxide among other gases in the exhaust, caused by an incorrect combustion, the lambda coefficient measurement is the most common. This leads to a lower peak combustion temperature which in turn reduces the formation of no x. Flue gas sometimes called exhaust gas or stack gas is the gas that emanates from combustion plants and which contains the reaction products of fuel and combustion air and residual substances such as particulate matter dust, sulfur oxides, nitrogen oxides, and carbon monoxide table 3.
Guide for implementation of sulphur oxide exhaust gas. The use of exhaust gas recirculation to optimize fuel. In many countries around the world, the emissions of nox from diesel and gasoline vehicles are restricted by legislation. Exhaust gas recirculation egr what the heck does this thing do. Cooled exhaust gas recirculation will play a major role in this technology mix, since it prevents no x from being produced. It works by recirculating a quantity of exhaust gas back to the engine cylinders. Intermixing the recirculated gas with incoming air reduces the amount of available o2 to the combustion and lowers the peak temperature of combustion. Exhaust gas recirculation systems powerpoint ppt presentation. Pdf impacts of exhaust gas recirculation egr on the. Exhaust gases from vehicles includes co,co2,hc,noxs etc. Exhaust gas recirculation full seminar report, abstract and. Media in category exhaust gas recirculation the following 14 files are in this category, out of 14 total. If an internal link led you here, you may wish to change.
This page was last edited on 19 january 2020, at 04. Methodology for instantaneous average exhaust gas mass. How exhaust emissions drive diesel engine fuel efficiency diesel emissions, exhaust emissions, diesel engines, fuel efficiency, fuel economy. You dont necessarily reuse the exhaust gas as it is almost completely void of oxygen used for combustion in the cylinders of the engine. Egr works by recirculating a portion of an engines exhaust gas back to the engine cylinders. In internal combustion engines, exhaust gas recirculation egr is a nitrogen oxide no x emissions reduction technique used in petrolgasoline and diesel engines. In the project presented in this article by wtz ro. For various openings of egrvalve, experiments are carried out on a set of loads varying from 0 to 15 percent of engine loads at a cruising speed of 3500rpm. The exhaust gases mainly consist of carbon dioxide, nitrogen etc. Now, a new exhaust cooler with an integrated bypass for use in passenger cars will also make it possible to reduce hc and co emissions. Methodology for instantaneous average exhaust gas mass flow. The following is a slightly shortened version of the german article. This method is very reliable in terms of fuel consumption egr is the most effective method for reducing the nitrous oxide emissions from the engine exhaust. Exhaust gas recirculation, ask latest information, exhaust gas recirculation abstract,exhaust gas recirculation report,exhaust gas recirculation presentation pdf,doc,ppt,exhaust gas recirculation technology discussion,exhaust gas recirculation paper presentation details,exhaust gas recirculation, ppt, pdf, report, presentation, source code, abstract, seminar, project idea, seminar topics.
Principle of exhaust gas recirculation egr partinfo1. This disambiguation page lists articles associated with the title egr. Exhaust gas recirculation egr is effective to reduce nitrogen oxides nox from diesel engines because it lowers the flame temperature and the oxygen concentration of. Jul 30, 2015 you dont necessarily reuse the exhaust gas as it is almost completely void of oxygen used for combustion in the cylinders of the engine. Page 1 of 12 exhaust gas recirculation implementation and displacement increase for improvements on a rotax ace engine saager paliwal, kyle karnick, thomas steffel, jennifer bartaszewicz. Exhaust gas recirculation egr ppt download slideplayer. Here, a part of the exhaust gases is rerouted into the combustion chamber. It must also withstand high temperatures, and should combine high flexibility with high. The specific heat of exhaust gas is high due to co 2 and h 2 o, which replace the n 2 and o 2, thus it results in a lower flame temperature during combustion process. Exhaust gas recirculation implementation and displacement. How exhaust gas recirculation system works must watch duration. This presentation does not contain any proprietary, confidential or otherwise restricted information.
Co2 h2o n2 as an engine will never be 100% efficient harmful gases are produced co, hc. Lowering the compression ratio and retarding ignition timings 3. A free powerpoint ppt presentation displayed as a flash slide show on id. The exhaust gases mainly consist of carbon dioxide, nitrogen, etc. Download the seminar report for exhaust gas recirculation. Here air injection method and exhaust gas recirculation are also used to reduce emission from engines. The reason your afr went rich is because the egr dilutes the intake charge in effect leaning it, removing the egr removes the dilution thus making the intake charge richer. Completely avoids increased exhaust gas back pressure minimizes the amount of equipment main features one common unit with suction fans for all combustion units onboard suction branches with shutoff valves from all exhaust gas and flue gas pipes fan redundancy embedded constant underpressure prevents undue flow of. Exhaust gas re circulation presentation 1 internal. Exhaust gas recirculation presentation free download as powerpoint presentation. A widely adopted route to reduce no x emissions is exhaust gas recirculation egr. For a gas at constant mass and volume, the pressure and temperature are directly related.
Recirculated exhaust gas displaces fresh air entering the combustion chamber with carbon dioxide and water vapor present in engine exhaust. This is actually a very common misunderstood process. Urea needs to be supplied to match the exhaust rate of flow and the nox concentration so the formation of ammonia occurs in correct proportion to maximize effectiveness and minimize slippage. If so, share your ppt presentation slides online with. Either reducing the concentrations of these elements or lowering peak cycle temperatures will. A valve is usually used to control the flow of gas, and the valve may be closed completely if required. Figure 1 shows the speed profile of the modified new european driving cycle mnedc, which is the test procedure for passenger cars in europe 2. All structured data from the file and property namespaces is available under the creative commons cc0 license. Introduction major problem faced by todays world is environmental pollution. Exhaustgasrecirculationinfourstrokeengine authorstream presentation.
Exhaust gas recirculation egr, nox and particulate. Fuel in the exhaust has the same effect as dumping gasoline on a bed of glowing embers. Figure 842 when the egr valve opens, the exhaust gases flow through the. Exhaust gas recirculation is an efficient method to. Principle of exhaust gas recirculation egr youtube.
The exhaust gas recirculation egr system recycles a small amount of exhaust gas from the exhaust system and mixes it with the intake manifold air going into the combustion chambers. The specific heat of exhaust gas is high due to co 2 and h 2 o, which replace the. Fluid dynamics the mixing of the injected urea in the exhaust stream must be complete and atomized adequate to thoroughly interact with exhaust chemistry. Reducing the amount of oxygen in the cylinder exhaust gas recirculation exhaust gas recirculation is an efficient method to reduce nox emissions from the engine. Exhaust gas recirculation, or egr, feeds some of the exhaust gases back into the intake. Exhaust gas recirculation egr systems engine applications 1. The first being, as already mentioned, a reduction of nox and the second is a reduction of combustion temps.
How exhaust emissions drive diesel engine fuel efficiency. I have physically blocked mine off from being able to send any exhaust gasses back to the intake, thinking this would reduce iats, allow for more fresh air to be drawn in to the cylinder and hence raising the knock threshold of the engine as well as promoting better performance. Special focus was on the basic engine parameters, such as thermal efficiency, brake mean effective pressure bmep, knocking behaviour and a reduction in the emission of unburned hydrocarbon thc. Dynamics study of an automobile exhaust system johan wall karlskrona, 2003. The principles used for co sensors and other types of gas are infrared gas sensors and chemical gas sensors.
1232 1056 261 902 327 416 1326 329 1528 493 735 960 661 444 130 18 894 1450 917 929 834 1617 647 1449 979 484 918 1638 1366 499 26 84 64 1285 579 297 677 907 767 75