A Review of Using Natural Gas in Internal Combustion Engines

Due to its increasing emissions from combustion of fuels in the internal combustion engines and increasing world concern on global warming problem. It’s a significant issue to use alternative fuels that would be safe for people and the environment. In this article, the previous research's concern on using natural gas is discussed. This research presents the precious studies on the benefits of using natural gas fuel in spark ignition, diesel, and agricultural engines. In addition to modeling focusing on engine parts loads to identify fuel-burning influence. Also presents a former discipline on using hydrogen enrichment to improve fuel efficiency and shows characteristics of using dual fuel in internal combustion engines. The difference between lean combustion and exhaust gas recirculation strategies and produces a comparison between natural gas/methanol and natural gas/gasoline in a dual-fuel engine are reviewed. In addition the comparative study between gasoline and natural gas with a direct injection strategy is presented. Also, this article focus on using natural gas as a fuel with reactive controlled compression ignition (RCCI). It can concluded that using the natural gas fuel is one of the perfect solutions to reduce hydrocarbons emissions and increase the thermal efficiency of fuel combustion and reduce the cost of energy production.