In gasoline engine, it is well known that the combustion mechanism is spark-ignition by mixing the air and fuel. The change of excess air ratio causes to the change of combustion conditions, the exhaust emissions are changing as a result. In this stud...
In gasoline engine, it is well known that the combustion mechanism is spark-ignition by mixing the air and fuel. The change of excess air ratio causes to the change of combustion conditions, the exhaust emissions are changing as a result. In this study the characteristics of exhaust emissions for in-use passenger cars (gasoline and LPG) were investigated by changing the execss air ratio. The excess air ratio and exhaust emissions were measured at idling state(emission measurement method for in-use vehicles in Korea) as well as fast idling state (measures at 2500rpm, used in U.S.A) and common exhaust emissions such as CO. CO₂ HC and O₂ were analyzed.<br/>