Full-load enrichment
In order to reduce the thermal load on the engine, the fuel correction factor will increase to over 1.00 once the calculated thermal load on the engine exceeds a certain value.
At the same time, the closed loop will be disabled (if it was active) to prevent it from counter-compensating. The calculated thermal load is based mainly on engine speed, air mass per combustion, ignition timing and the duration of these operating conditions.
This means that closed loop can be active when the engine is running under high loads for short periods.
This differs from earlier model years in that closed loop is disabled when the engine load exceeds a certain value.
Closed loop will be disabled when the engine is running under high loads when the thermal load exceeds a certain programmed value.
The correction factor will then increase from 1.00 to the value this operation point requires in order to prevent the engine from being damaged by high combustion temperatures.
The function is not active in the following cases:
- Engine coolant temperature below 70 °C.
- Acceleration higher than 35% in the range 1600-3000 RPM and air mass per combustion exceeding 660 mg/c if the vehicle speed is below 110 km/h.