1.21 Calculated load and fuel trim determination
The calculated engine load "rl" is based on a calculated load signal balanced with the output signal delivered by the hot-film air-mass sensor (HFM).
It is calculated as follows:
with ...
mszyl: calculated load signal balanced with mshfm and corrected with mste
mshfm: air mass from HFM
mste: calculated gas mass flow through canister purge valve
nkw: engine speed
K_UFAK_MS_RF: constant depending on displacement
In case of a malfunction of the HFM the balancing with mshfm is cut off. Mszyl is calculated by the throttle valve angle, the variable valve timing, the residual exhaust gas and the engine speed.