1. Diesel Engines Photo credit www.f1fanatic.co.uk

2. How it works Intake stroke -The intake valve opens up, letting in air and moving the piston down. Compression stroke- The piston moves back up and compresses the air. Combustion stroke- As the piston reaches the top, fuel is injected at just the right moment and ignited, forcing the piston back down. Exhaust stroke- The piston moves back to the top, pushing out the exhaust created from the combustion out of the exhaust valve.

4. Diesel engines are more efficient Less pollution of CO 2 Diesel has a higher potential energy than gasoline Compressive detonation is more uniform than spark plugs Bio-mass fuel capable Advantages

5. Drawbacks Engines are heavier Cold weather creates ignition problems Higher demands on components Soot

6. Videos http://www.dailymotion.com/video/x19krh_ 1-audi-r8-le-mans-version_auto http://thekneeslider.com/archives/2007/05/ 22/hydrostatic-drive-diesel-motorcycle/

7. Sources http://autotips.plentycar.com/diesel- engine-more-efficient-than-gasoline- engine/http://autotips.plentycar.com/diesel- engine-more-efficient-than-gasoline- engine/ www.wikipedia.org http://www.howstuffworks.com/diesel.htm http://hyperphysics.phy- astr.gsu.edu/Hbase/thermo/diesel.htmlhttp://hyperphysics.phy- astr.gsu.edu/Hbase/thermo/diesel.html