Once the ECU decides the load is large enough for enough time, or the requested AFR is no longer lambda=1, its fueling control system goes open loop. As long as lambda control stays closed loop, the ECU will adjust the fuel mixture via feedback loop using the narrow-band O2 sensors. This requested load determines the throttle plate angle and requested pressure. This, in turn generates a "requested load" (nominal charge), which is capped by "specified corrected load" (a function of RPM, IAT and other limiting parameters, such as knock control, etc.). ME7 continuously calculates the "nominal charging moment" (requested torque) that the user seems to be requesting. ME7 is a load based engine management system. Non-volatile code/data is stored on a single 16bit Am29F800BB 44 pin PSOP flash device. The Bosch ME7.1 Engine Control Unit (ECU) appears to use two 16bit Infineon B59233-FA (aka SAK-C167CR-4RM) CPUs.
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