Eine noch ausstehende Antwort zur Barokorrektur, hier mal als Zitat aus einer frühen Quelle:
ZitatAlles anzeigen
Air Box Pressure Compensation
The system uses a barometric pressure (read just after key-on or stored
previously) to determine a fuel correction value CR_Baro. The system also
compares the baro reading to a real-time Air Box Pressure reading, sampled
engine-syncronous. The ratio ABP / Baro is used to calculate CR_ABP.
This feature is designed to compensate for air box restriction as well
as ram air effects.
Air box pressure conversion table (Tab_ABP_Conv)
A/D counts must be in ascending order. Pressure can be in any units
(millibars, inches of water, percent of atmosperic, etc) but must be
consistent between Tab_ABP_Conv, Tab_CR_Baro, and Tab_CR_ABP.
Pressure range must be within 0-255. A/D values outside of table range
are clamped at the nearest corresponding table endpoint pressure.
Baro correction table (multiplier) (Tab_CR_Baro)
Correction factor is a function of the baro (static air box) reading.
Baro Pressure outside of the table range is clamped at the nearest
corresponding table endpoint value.
Airbox correction table (multiplier) (Tab_CR_ABP)
Correction factor is a function of the current airbox pressure
as a percentage of the stored baro reading. That is, if the
airbox pressure is 70 and the baro pressure is 90, the table
index would be (70/90)*100, or 78. Air Box Pressure outside
of the table range is clamped at the nearest corresponding
table endpoint value.
Wenn das jemand verstanden hat, dann ist das super und er darf es mir gerne auch erklären. Weil ich habe es nämlich nicht verstanden, warum man bei Absolutdruckmessern in der Airbox zwei Tabellen benötigt, um die Korrektur zu berechnen.
Links zu den Variablen in unserer Website:
airbox pressure conversion table = http://www.ecmspy.com/cgi-bin/detail.cgi?ecm=8&offset=246
baro correction table = http://www.ecmspy.com/cgi-bin/detail.cgi?ecm=8&offset=256
airbox correction table = http://www.ecmspy.com/cgi-bin/detail.cgi?ecm=8&offset=266