The functional objectives for fuel injection systems can vary. All share the central task of supplying fuel to the combustion process, but it is a design decision how a particular system will be optimized. There are several competing objectives such as:
power output
fuel efficiency
emissions performance
ability to accommodate alternative fuels
reliability
driveability and smooth operation
initial cost
maintenance cost
diagnostic capability
range of environmental operation
Certain combinations of these goals are conflicting, and it is impractical for a single engine control system to fully optimize all criteria simultaneously. In practice, automotive engineers strive to best satisfy a customer's needs competitively. The modern digital electronic fuel injection system is far more capable at optimizing these competing objectives consistently than a carburetor. Carburetors have the potential to atomize fuel better (see Pogue and Allen Caggiano patents).
Sunday, October 11, 2009
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Thanks for the great tutorial. It is nice to go through the process at a high level.
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