Torque monitoring protects drivetrain components by validating that estimated engine torque is consistent with allowed limits. Modern ECUs cross-check multiple torque pathways to detect manipulation or mechanical anomalies.
Visión general
The ECU compares requested torque, modeled torque and measured torque proxies (airmass, injection quantity) to detect discrepancies.
Controlled Signals
- IQ request
- Air mass
- Boost pressure
- Rail pressure
- Driver wish torque
Maps Involved
- Driver Wish
- Limitadores de par (gear, temperature, smoke)
- Smoke Model → load estimation
- Engine Efficiency Maps
ECU Logic
Driver Wish → Torque Request
↓
Torque Limiters Applied
↓
Torque Model (airmass, fuel, pressure)
↓
Torque Monitoring Cross-Checks
↓
If mismatch → Limp Mode
Calibration Objectives
- Avoid false torque deviation trips
- Maintain consistent torque pathways
- Ensure safe mechanical loads
Calibration Strategy
- Harmonize torque limiters before raising torque
- Avoid breaking relationship between airflow and IQ
- Correct smoke model early in the process
Diagnóstico
- P061B / P06xx torque correlation faults
- Airflow-to-IQ mismatch
- Smoke model inconsistent values
Best Practices
- Consistency beats peak torque
- Validate torque model under transient conditions
