Engine performance, emissions characteristics of the compression ignition engine using HHO gas (Brown’s gas)

Abstract

HHO gas (Brown’s gas) has recently been used as a new source of energy. The study presents the experimental results at 50% of the accelerator pedal when installed hydroxy (HHO) gas generator on 490 QZL diesel engines. HHO gas was provided into the engine manifold. Comparing the experimental results found that: the economic, technical and exhaust emissions of the diesel engine was improved. The brake power index increased by 2.8% in average compared to pure diesel and 4.2% was the percentage of the maximum engine power increasing at 2200 rpm. Especially, the amount of brake specific fuel consumption (BSFC) in pure diesel was always higher than one in diesel with HHO gas, which was 13.7% in average. At 1800 rpm, the difference of the minimum value of BSFC in two cases was 12.6%. The HC and CO emissions value reduced by 7.7% and 19.8% in average, respectively, while NOx increased by 13.3% in average compared to pure diesel.