Carberuator vs Fuel Injection

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Carburetor vs Fuel Injection A comparative/ contrast essay by Tony Mizzell In the “automotive performance” industry a question that is often asked is what are the benefits vs downfalls, when it comes to building an engine that uses a carburetor or fuel injection. They both have good as well as bad points. I am going to describe the ways that each provide fuel in an automobile engine. The Carburetor supplies fuel to the gasoline engine by means of vacuum gravity and a manual lever and diaphragm type pump. The fuel is sent under low pressure via a low volume low pressure pump, either electric or mechanical. Fuel is sent to the “float bowl” where a floating tank and needle and seat metering valve allows the float bowl level to stay correct and keep fuel supply constant. After that is supplied to a metering block and jet nozzles by vacuum and pressure from the accelerator pump. Finally the fuel is distributed into the intake air stream in the venturi and to the combustion chamber where the air fuel is ignited. Carburetors work very well when properly adjusted and in good operating Fuel injection does the same job as carburetors but with far more precision and accuracy. In a E.F.I. (Electronic Fuel Injection) system a computer uses various sensors to measure conditions inside and out of the engine. Variations in air intake volume, ambient air temperature, engine coolant temperature, manifold absolute pressure, crankshaft/ camshaft position and speed, and exhaust hydrocarbon content to adjust optimal fuel delivery. Air enters the engine via a throttle plate and is sent to the intake plenum where the air charge gathers volume and is sent to the intake manifold. The intake manifold creates velocity in the air charge before entering the combustion chamber. Just before the combustion chamber the fuel injector emits a fan nozzle spray of

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