Extension of Diesel Engine Load Range with Simultaneous Reduction of NOx and Soot by using Ethanol Port Injection, High Intake Boost and EGR

Abstract

In this work, ethanol port injection was used in a diesel engine as a strategy to extend engine load range while simultaneously reducing NOx and Soot. The engine performance was investigated under high intake boost with different ethanol and EGR ratios. It was found that ethanol port injection increased the load limitation by about 50% compared to diesel low temperature combustion at intake boost of 1.0 bar gauge. When intake boost of 1.5 bar gauge and ethanol ratio of 83% by total fuel energy was used, 16 bar IMEP was achieved successfully with less than 0.2 g/(kW·h) NOx and 0.01 g/(kW·h) Soot.