Performance of SI Engine by Using Pre-heated Fuel with Carburetor

Internal combustion engines in the modern times their extensive use in Automobiles and other power generating applications has been one of the major contributors to pollution. This research is to investigate the performance of SI engine by using pre-heated fuel with carburetor aimed at making the air-fuel mixture more homogeneous, to reduce the fuel consumption and gives way for improvement of efficiency of the engine. Research was conducted by using a 350cc four-stroke, spark ignition, air-cooled, single cylinder engine. Gasoline is used as a test fuel. The test stand consisted of a small dynamometer coupled to the engine. The engine is tested to conduct performance tests and investigate the emission characteristics with the normal mode engine operation and with the aid of carburetor. The test has been conducted under no load and at different loads maintaining the speed at a constant value of 2250rpm throughout the test. The results concluded that, spark advance at preheating fuel temperature with the aid carburetor are feasible. Based on the performance and emission characteristics the pre-heated fuel gives improvement than unheated fuel.