A Study on Combined Effect of Biodiesel, Parametric Optimization and EGR Technique on Diesel Engine Performance

NOx formation in the diesel engine is highly temperature dependent phenomenon and takes place when combustion chamber temperature crosses 2000k. So to reduce NOx emission it is necessary to keep combustion temperature under control. Late injection of the fuel is one of the simplest way to keep NOx formation in control. Though this technique is very effective in NOx formation control, it is not fully acceptable due to increase in fuel consumption up to 10-15%. This leads the research to use more effective NOx reduction technique like Exhaust Gas Recirculation (EGR). Recirculating the Exhaust gas reduces the NOx emission but on the other hand there is increment in Particulate Matter. With increase in EGR rate there is decrement in NOx emission. But due to well-known tradeoff between NOx and PM it is necessary to use PM Trape like catalytic convertor. In present study, the effect of diesel engine parametric optimization, for NOx reduction, on engine performance has been investigated. Also effect of Biodiesel and its blend on NOx emission has been investigated. An experimental investigation was also conducted to investigate effect of EGR on NOx emission. The experimental setup for this research work was developed on, single cylinder, four stroke, vertical, direct injection, water cooled, naturally aspirated diesel engine.