Performance Testing Of Si Engine Fuelled With Gasoline- Ethanol Blend And Lpg

Abstract

Alternative Fuels For Both Spark Ignition And Compression Ignition Engines Have Become Very Important Owing To Increased Environmental Protection Concern, The Need To Reduce Dependency On Petroleum And Even Socioeconomic Aspects. The Primary Objective Of This Study Is To Test The Performance Of A 4 Cylinder 4 Stroke Si Engine Fuelled With 10% Ethanol- 90% Gasoline Blend And Lpg. The Significance Of This Study Is That Helps To Understand The Performance Of Spark Ignition Engine When Fuelled With Gasoline- Ethanol Blend And Lpg, Contribute To The Current Body Of Literature Regarding Use Of Gasoline- Ethanol Blend And Lpg Fuels In Ic Engines And Can Be Useful For Several Researches To Come. In This Study The Engine With Compression Ratio 9:1 Is Tested Using Gasoline- Ethanol Blend And Lpg By Varying Engine Speed. Performance Tests Are Conducted For Brake Torque, Brake Power, Brake Specific Fuel Consumption And Brake Thermal Efficiency Using A Chassis Dynamometer. Emission Tests Have Verified That When The Engine Is Fuelled With Lpg The Concentration Levels Of Co And Hc Are Found To Be Lower Than Gasoline- Ethanol Blend. Lpg Is Found To Be Cleaner Than Gasoline- Ethanol Blend. Lpg Has Shown 23.51% Reduction In Brake Torque On Average, But Lpg Has Also Registered 6.52% Torque Reduction In Medium Speeds. The Torque Performance Characteristics Have Shown That Lpg Performs Comparably As Well As Gasoline- Ethanol Blend In Medium Speed Ranges. On Average Lpg Shows A 38.125% Reduction In Brake Power. However, At Lower Vehicle Speeds The Brake Power Reduction Is Comparatively Small. For Example, When The Vehicle Is Driven At 30km/Hr On 4 Th Gear, The Brake Power Reduction Is Only 4.41%. Based On The Brake Power Performance Characteristics Lpg Is A Good Alternative For Vehicles That Are Mostly Driven Within City Speed Limits. The Brake Specific Fuel Consumption (Bsfc) Results Show That The Performance Of Lpg Is Better Than Gasoline- Ethanol Blend. Although Lpg Was Found To Have The Largest Brake Thermal Efficiency Of 36%, Its Average Brake Thermal Efficiency Is 25.5%. Gasoline- Ethanol Blend On The Other Hand Has A Maximum Brake Thermal Efficiency Of 43% And Average Brake Thermal Efficiency Of 31%. The Results Show That The Performance And Emission Characteristics Of The Lpg- Fuelled Engine Are Well Suited For Stationary Engines Such As Generators And Water Pumps Operating In Medium Speed Range. Vehicles Such As Taxis, School Transport Vehicles, Automobiles Operating In Towns And Other Vehicles Which Are Mostly Driven At High Speeds In The Vicinity Of 30km/Hr Are Better Fuelled With Lpg