Performance and pollution emissions of a biogas-HHO port injection engine
Abstract
An electronic control system is set up to convert a traditional engine into a hydroxy enriched biogas dual port injection engine. Hydroxy addition into biogas improves the engine work cycle. CO concentration decreases linearly with HHO content but NOx concentration increases by parabolic relation with HHO content. Biogas enriched by 30% hydroxy is the best compromise between engine performance and pollution emission. The dual injection of hydroxy and biogas creates an advantageous distribution of H2 and CH4resulting in an improvement of engine performance. Increase of hydroxy content leads to a decrease of optimal advance ignition angle and reduces the range of its variation with engine speed.
Moraref