Calculated load and fuel trim determination
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 BMW Z4, 2008 BMW X5, 2008 BMW X3, 2008 BMW 528xi, and 2008 BMW 528i. However, it is still accessible from the selected car via links, so may be relevant.
The calculated engine load "LOAD_CLC [%]" is based on the calculated mass air flow) Speed Density-System - The Air Mass Flow for a suction stroke is a function of the intake system manifold pressure and the air temperature
Strategy:
A 2-dimensional map is used to interpolate the calculated engine load "LOAD_CLC [%]" depending on calculated mass air flow and engine speed. A weighting factor is applied to compensate the altitude influence.
The calculation is performed as follows:
LOAD_CLC [%] = LOAD_CLC_RAW f (calculated mass air flow, engine speed) x (1013hPa / ambient pressure) x 100%
with:
CALCULATED LOAD DESCRIPTION
| LOAD_CLC | calculated engine load in % with altitude correction |
| LOAD_CLC_RAW | calculated engine load in % without altitude correction |