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Forced Induction Engines

Forced Induction Engines. Luke Tracy. Introduction: Internal combustion engine. Combustion Fuel + air Occurs in combustion chamber Energy moves the parts of engine and car Piston and crankshaft. Intake – Combustible mixture of air to fuel is placed in the combustion chamber.

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Forced Induction Engines

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  1. Forced Induction Engines Luke Tracy

  2. Introduction: Internal combustion engine Combustion Fuel + air Occurs in combustion chamber Energy moves the parts of engine and car Piston and crankshaft

  3. Intake – Combustible mixture of air to fuel is placed in the combustion chamber. Compression – The mixture of air and fuel is compressed and placed under pressure. Combustion - The hot mixture is expanded, pressing on and moving parts of the engine and performing useful work. Exhaust – The cooled combusted products are released. Combustion Process

  4. Naturally Aspirated Engines • Internal combustion engine that does not use forced induction • Problems • Air to fuel ratio • Must use big displacement engines for more power/performance. • Lower gas mileage • Increase emissions

  5. Forced Induction Engine • Forced induction – Use of a gas compressor in the air intake to increase the air/fuel ratio. • Increases power without increasing displacement • Higher performance • Better gas mileage • Better emissions

  6. Forced Induction Engine Cont.. • Forced Induction accomplished by use of either a supercharger or turbocharger • Both use same basic idea and principal to compress and force air into the cylinder. • Increases combustable air (oxygen) = more power

  7. Supercharger • Driven by an accessory belt wrapped around a pulley which rotates drive gear. • The drive gear rotates the compressor gear. • Compressor draws in air, compresses it into a smaller space, and releases it.

  8. Turbocharger • Powered by the mass-flow of exhaust gases driving a turbine. • Turbine compresses and forces air into cylinder.

  9. Naturally Aspirated(N/A) vs. Forced Induction

  10. Negatives • More expensive • R&D • Hardware is expensive • Turbochargers • Superchargers • Intercoolers • More prone to failure • Maintenance

  11. Resources • Fueleconomy.gov 2008. 17 Nov, 2008. http://fueleconomy.gov/ • Harris, William. “How Superchargers Work”. How Stuff Works 2008. 17 Nov. 2008. http://auto.howstuffworks.com/supercharger.htm • “Internal-combustion engine”. 2008 Encyclopedia Britannica Online. 17 Nov. 2008 <http://www.britannica.com/EBchecked/topic/290504/internal- combustion-engine>.

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