The Importance of Methanol-Gasoline Blend in Spark Ignition Engine—A Review

摘要

The air pollution produced by motor vehicles is getting worse day by day especially in major cities in the world. A very high density of motor vehicle traffic on road and change in lifestyles of the people contributed largely to the increase of pollution. The emission produced by the vehicles must be reduced and controlled to prevent or minimize the air pollution problem. It is also essential to meet the particular country emission standards. The principal polluting agents in gasoline emissions are CO, NO_x, hydrocarbons, etc. It was observed by various researchers that the fuel efficiency was improved by using a blend of methanol-gasoline in the gasoline engine. The methanol blend in gasoline was varied, and the performance of the engine regarding maximum output power and braking power was studied in several papers. The chemical and physical properties of the blend were also checked and reported. The present study aims to summarize the performance of methanol-gasoline blend used in spark ignition engine. The review is mainly focused on fuel properties, output power/torque, braking efficiency, emissions, etc. It was observed that the CO, NO_x, smoke, and particulate matter (PM) concentration in exhaust gas reduced significantly, whereas the CO_2 and unburnt hydrocarbons emissions were increased after using the blended gasoline in the engine.