What is RCCI

In this chapter, four alternative fuels were obtained from non-edible oils, namely Moringa oleifera seed oil, pumpkin seed oil, waste cooking palm oil, and lemon oil. The existing diesel engine intake manifold was converted into port charged compression ignition engine by adopting necessary supporting components and control mechanics. In this study, two modes of injection were carried out, namely main injection with conventional fuel and pilot injection with the prepared alternative fuel samples. Due to characteristic fuel properties, lemon oil biofuel in pilot fuel injection experienced high thermal efficiency and low fuel consumption. At all loads, lemon oil biofuel in pilot fuel injection exhibited lower emission than other alternative fuel samples. Lemon oil biofuel in pilot fuel injection and conventional fuel in main injection showed superior combustion characteristics. On the whole, this work recommends the application of the alternative fuel admission in pilot injection mode by adopting PCCI technique to achieve improved engine characteristics.