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. Combustion Process 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.

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 1.Driven by an accessory belt wrapped around a pulley which rotates drive gear. 2.The drive gear rotates the compressor gear. 3.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 ModelEngineHP/TQMPG HWY/CITY 2000 Audi A42.8L V6 N/A150hp/207ftlb24/16 2000 Audi S42.7L V6 Biturbo250hp/258ftlb22/15 2006 Audi S44.2L V8 N/A340hp/302ftlb21/16 2008 Nissan GTR 3.8L V6 BiTurbo480hp/430ftlb21/16 2008 Ferrari F430 4.3L V8 N/A483hp/343ftlb16/11

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