1. Car Exhaust System By: Saoud Al-Kuwari

2. Main Ideas: Definition Main parts Past Present How it works Future

3. Definition: Exhaust system carries away the gases created when the fuel and air are burned in the engine. These gases are harmful to humans and our life.

4. In The Past: Made from iron. Created a lot of noise. Harmful carbon and hydrocarbons.

5. Present: Made from stainless steel or aluminum. Less noisy. water stem and carbon dioxide.

6. Main parts: Exhaust manifold Catalytic converter Oxygen sensor Exhaust pipe Muffler

7. How it works Exhaust manifold: It’s connect to the engine. Take all cylinders exhaust to one pipe. Made from steel, stainless steel or aluminum. Catalytic converter: This muffler changes harmful carbon and hydrocarbons to water stem and carbon dioxide.

8. Oxygen sensor: It’s measure how much oxygen in the exhaust. It’s connect to computer to control the correct mixture for fuel economy. Muffler: It’s work to reduce the noise of the exhaust process . Exhaust pipe: It’s work as connect all parts together and move the gas throw it .

9. Future: Hybrid cars. Gasoline fuel.

10. Sources: http://www.autoeducation.com/autoshop101/exhaust.htm http://www.2carpros.com/articles/how-exhaust-systems-work http://www.kwik-fit.com/how-exhausts-work.asp