I've been reading up on diesels and have learned about the 3 modern methods for direct injection. If someone know the pros and cons and/or other methods please join in.

1)Distributer pump- Has one pump and a valve that directs the fuel to each cylinder

2)Common rail- Has one super high pressure pump that supplys fuel to each cylinder all the time (I think?).

3) The last method is when each cylinder has its own pump.