i dont understand exactly how it works. cam someone give me a detailed explanation?

spanks!

http://en.wikipedia.org/wiki/Gasoline_direct_injection

http://img169.imageshack.us/img169/3426/x09ptep106sa7.th.jpg (http://img169.imageshack.us/my.php?image=x09ptep106sa7.jpg)

The fuel is injected right into the combustion chamber. This requires extremly high fuel pressures, and considerably shortens the window that you can inject the fuel.