Control of cold start hydrocarbon emissions of motor bike engine by gasoline-ethanol blends and intake air heating

摘要

Two wheeled motor bikes are playing an important role in urban passenger transportation owing to ease of handling and affordable cost. Maximum amount of unbumt hydrocarbons (HC) and carbon monoxide (CO) are emitted during cold start of spark ignition engines. The current work presents the possible reduction of cold start HC emissions of 150 CC motorbike spark ignition (SI) engine with ethanol-gasoline blends and/or with intake air heating by glow plug. Anhydrous ethanol was blended with unleaded gasoline in the range of 0% (E0) to 20% (E20) by volume to be used as fuel. The experimented parameters were intake air temperature, exhaust gas temperature, fuel consumption and exhaust gas emissions. Without intake air heating, E10 was found to be the optimum to reduce the cold start HC emissions by 23%. With intake air heating in the range of 40℃ to 70℃, maximum HC emissions reduction was 23.8% for neat gasoline at 50℃ and 33.6% for E10 blend at 60℃.