Electronic Fuel Management–Fundamentals

Systematically reviewed are the fundamentals of Electronic Fuel Management (EFM). Included is a discussion of five EFM areas:

1. 1)
   air sensing concepts
2. 2)
   fuel metering concepts
3. 3)
   fuel delivery to the cylinders
4. 4)
   fuel preparation with the air
5. 5)
   calculation hardware (ECM)

Presented as a part of the air sensing section is a summary of the physical principles that may be applied to compressible fluid mass air flow rate measurement.

Finally, an example of digital computer control of a timed speed density system is reviewed.