Abstract

In this study, a prototype single cylinder engine (capacity 948cc) was fuelled with H₂ in both naturally aspirated (NA) as well as in supercharged (SC) conditions and ignited with the help of spark ignition (SI) and laser ignition (LI) respectively. It was observed that H₂ engine operated efficiently beyond λ=2.0 in supercharged conditions. Using LI, the peak cylinder pressure and NOx emissions (> 300 ppm) reduced with supercharging. Brake thermal efficiency (BTE) increased with increasing brake mean effective pressure (BMEP) and were higher for LI (40.35%) compared to SI (32.29%) at 3.987 bar BMEP. Lower exhaust gas temperature (EGT) and brake specific fuel consumption (BSFC) were observed for LI with supercharging (LI_SC) compared to SI with naturally aspirated (SI_NA) at stoichiometric conditions.

© 2017 Optical Society of America