Review on Combine Effect of Exhaust Gas Recirculation (EGR) and Inlet Air Pressure on Performance and Emission of Diesel Engine
Patel Vibha1, Hardik B.Ramani2
1Patel Vibha,  M. Tech (Thermal Engineering pursuing), Jodhpur National University, JNU, Jodhpur, India.
2Prof.Hardik.B.Ramani,  Mechanical Dept, OM College of Engineering, Junagadh, India.
Manuscript received on January 23, 2014. | Revised Manuscript received on February 14, 2014. | Manuscript published on February 28, 2014. | PP: 164-167  | Volume-3, Issue-3, February 2014. | Retrieval Number:  C2622023314/2013©BEIESP

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Abstract: Concern of environmental pollution and energy crisis all over the world have caused the research attention on reduction of diesel engine exhaust emissions and saving of energy simultaneously. Better fuel economy and higher power with lower maintenance cost has increased the popularity of diesel engine vehicles. Diesel engines are used for bulk movement of goods, powering stationary/mobile equipment, and to generate electricity more economically than any other device in this size range. As we know that the diesel engine are known for their high NOx formation and Exhaust Gas Recirculation (EGR) is being used widely to reduce and control the oxides of nitrogen (NOx) emission from diesel engines. EGR controls the NOx because it lowers oxygen concentration and flame temperature of the working fluid in the combustion chamber. However, the use of EGR leads to a trade-off in terms of soot emissions moreover it exhausted more unburned hydrocarbons (20–30%) compared to conventional engines and it also affect the volumetric efficiency and BSFC of engine performance. The increased in inlet air pressure results in better scavenging and reduced exhaust temperature in the engine, better mechanical efficiency and improved volumetric efficiency. Therefore, by using EGR with pressurized inlet air have different effect on both engine emission such as CO, UHC and NOx and on the engine performance such as BSFC, torque, thermal and volumetric efficiency.
Keywords: Exhaust gas recirculation, Diesel engine, Inlet air pressure, Emission.