Impact of HHO gas on diesel engine performance and emissions

Green transportation will play an important role in future such as: ground and air applications. Hydrogen has a wide variety of applications in spite of decreasing of natural resources. Depletion of fossil petroleum resources and continuous increase of fuel consumption led to search about fuel saving solutions. Hydroxy gas (HHO) was produced by the electrolysis process. HHO gas was used as an additive fuel. Effect of HHO on engine performance and exhaust was investigated. A constant flow rate of 0.42 liter per minute of HHO gas was introduced through the intake port of the engine. Tests were investigated at different engine loads. HHO gas was enriched with air in diesel engine, the thermal efficiency was increased by 7% and specific fuel consumption was reduced by 15% at full load compared to diesel oil. HC emission was reduced at an average of 25% with hydroxy gas. CO emission was reduced at an average of 18% in comparison to pure diesel. NOx was increased with hydroxyl gas addition at full load condition by about 8% compared to pure diesel. HHO gas was recommended as a good additive to diesel oil in performance improvement and emissions reductions.