GM > Engine > Torque Management > Engine Torque

Engine Torque Model
The PCM uses a airflow, fuel and thermal efficiency and heat based model of torque.

AC Compressor Torque
The AC compressor places a large and variable load on the engine when engaged. The PCM has a complex model of AC Torque load including inertia effects and ramp in/out when the AC clutch first engages. The AC torque calculation is also used to calculate the Idle AC Airflow compensation for IAC/ETC control during idle.

AC Bump Torque
This is the transient model of AC torque load when the AC clutch engages and disengages.

Delivered Torque PWM
The delivered torque PWM is used in various applications. eg. for some Holden vehicles it is used to control the fuel pump voltage.

Stall Protect