Difference between revisions of "FMA"

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# [[ECU]] checks [[FMA]] tables and finds out that last injection event caused excessive smoking at 32°
 
# [[ECU]] checks [[FMA]] tables and finds out that last injection event caused excessive smoking at 32°
 
# injection duration is corrected down to 31.7° based on historical injection errors
 
# injection duration is corrected down to 31.7° based on historical injection errors
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[[Category:automotive]]
 +
[[Category:ecu]]

Latest revision as of 11:40, 11 June 2020

Automotive lingo abbreviation for Fuel Mean value Adaptation (Kraftstoffmengen-Mittelwertadaptation). It corrects injection errors based on MAF modelling and Lambda output.

Bosch EDC16 series offers short and long-term tables of corrected injection errors.

Example

  1. Driver requests IQ 55mg of fuel, which translates into 32° of crankshaft
  2. ECU checks FMA tables and finds out that last injection event caused excessive smoking at 32°
  3. injection duration is corrected down to 31.7° based on historical injection errors
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