Experimental Assessment of Genset Performance for PCCI-DI Combustion Engine

Applying the PCCI-DI combustion concept which can yield low emissions is tried for vehicular applications. However, much work has not been carried out on the genset engine which is a constant speed application. The PCCI can be achieved by various methods like port injection, late direct injection, early direct injection, and multiple direct injections to name a few. However in this case, it is achieved using the port injection. The two different port injection quantities are tried out. The first is with 3 ms pulse and the other with 5 ms pulse of port injection. In this study, PCCI-DI engine is assembled with the alternator to form a genset. The genset is tested for assessing its behavior in real-world conditions. The main trials to simulate the realworld condition are the load throw-on and load throw-off trials. The extreme case of these trials is to load the engine from no load to full load during the throw-on trials and reverse in throw-off trials. The results indicate the best performance in the case of pure DI combustion. With the use of port injection, the genset performance decorates. This is due to the fuel being injected in the port and it takes a finite time for the reaction to sudden loading and de-loading of the engine. The higher the amount of port fuel injection the higher the deterioration in response is observed. The result gives the actual performance and the response in all three combustion configurations. All three cases met the ISO 8528-5 G3 class requirements.