Experimental Investigation on LHR Extended Expansion DI Diesel Engine Emission Controlling Injection Timing

Fossil fuels are depleting rapidly because of incremental consumption rate due to population growth and necessary comforts on par with civilization. In this connection, the conventional fuels especially petrol and diesel for internal combustion engines, are getting exhausted at an alarming rate. In order to conserve the fossil fuels or to plan for survival of technology in future it is essential to plan for alternate fuels. Further, these fossil fuels cause serious environmental problems as they release toxic gases into the atmosphere at high temperatures and concentrations. Some of the pollutants released by the internal combustion engines are HC, CO, NOx, smoke and particulate matter. The predicted global energy consumptions are double by 2030 and quadruple by 2100. In view of this, an attempt is made to study a Low Heat Rejection (LHR) concept as one of the measures. The ignition delay will vary as the injection timing of the engine is varied. The variation in the injection timing will be effecting the performance and exhaust emissions of the engine strongly. The experimental results of the effects of variation in injection timings on the emission of LHR extended expansion engine is presented and analyzed.