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Description: Hi this video explains about the Exhaust gas recirculation system, watch the entire video and lean it This is a technology employed on engines to reduce the amount of harmful nitrogen oxides been pumped out from the exhaust of an engine. As the pollution norms are strict in many parts of the world such new initiatives will be seen in future also to protect our environment. Exhaust gas recirculation system is a nitrogen oxide reduction technique used in petrol and Diesel engines. This works by recirculation a portion of the engine exhaust gas back to the engine cylinder. Before going into exhaust gas re-circulation system let's learn about some basics of these oxides and how they are formed. O2 or oxygen - two oxygen atoms are required to create oxygen. N2 or nitrogen - two nitrogen atoms are required to create nitrogen. NO or oxide of nitrogen - one nitrogen atom and one oxygen atom is required to create oxide of nitrogen. NO2 or nitrous oxide - one nitrogen atom and two oxygen atoms are required to create nitrous oxide. NOx or oxides of nitrogen - one nitrogen atom and three or more oxygen atoms are required to make oxides of nitrogen. ( “x” stands for unknown number of oxygen atoms ) CO or carbon monoxide - one carbon atom and one oxygen atom creates carbon monoxide. CO2 or carbon dioxide - one carbon atom and two oxygen atoms. EGR works by diluting the nitrogen with the inert gas carbon dioxide, to act as an absorbent of combustion heat to reduce high cylinder temperature. At a very high temperature only NOx is produced. So what EGR does is - it reduces the temperature by reducing the chance of NOx been created (but this heat reduction will definitely affect the engine efficiency) almost all the new generation engines used EGR to meet the emission standards. EGR valve opens up when it get a back pressures from the engine exhaust and channels it back to the combustion chamber.The exhaust gas is channeled back to the engine cylinder because it's is much hotter than intake air. As mentioned above NOx is created at very higher temperature, as the exhaust gas get mixes up with the intake air, as the percentage of oxygen in the mixture reduces. This will reduce the combustion ability and results the fuel to burn at lower temperature. In some EGR system it will employ a cooler before the exhaust getting mixed with the inlet gas. So the fuel mixed with exhaust burns cooler and the chances of NOx production reduce. Other than NOx reduction EGR is also used to: 1. To impart the knock resistance and reduce the need of high load fuel enrichment in SI engines. 2. Improving the ignition quality of difficult to ignite fuels in Diesel engines. Please visit our YouTube channel youtube.com/user/TechTrixInfo for more tutorial video ------ We are taking a lot of effort with our limited resources and time to make simple animations to make your learning experience more simple and effective. Please click the LIKE / COMMENT / SHARE to motivate our team. You can also ask for technical video that we should make through comments. ------- These are some of our famous tutorial video: How to drive n Operate a JCB BHL Machine: youtube.com/watch?v=d0QsBcyuQKw&list=TLxVT-8RVZwj6rt8TF6qQASojgB2HyFj6A How piston pump works: youtube.com/watch?v=BEpQFZ5BG8c Animation - How Clutch Works: youtube.com/watch?v=H7Iay0Ke_t4&list=TLEAR3w8CXdzQVx8Wk-RWxgIKniXTYNllp How fuel injection pump works: youtube.com/watch?v=HVIE36oIR1s&list=TLbG7_oGzfXfRpBh5Sa-6bA0OGexW_wY2T How Hydraulic Ram Works: youtube.com/watch?v=svdsbL4PLL4&list=TLsKtRNvm03sqKvd1AwOEbOsWZZezoXJ5z Related topics: exhaust gas recirculation system, exhaust gas recirculation system (egr) for two wheeler, exhaust gas recirculation system in automobiles, egr, egr valve, engine egr, engine egr valve, engine egr system, diesel engine egr system, diesel engine egr problems, diesel engine egr valve operation, engine, exhaust, gas, recirculation, system, car, automobile, pollution, nox, reduction, nox reduction, nox reduction technology, technology, exhaust gas recirculation flow, exhaust gas recirculation sensor, exhaust gas recirculation system animation, exhaust gas recirculation working, exhaust gas recirculation valve, egr valve animation