Restoring adaptation values for quantity mean value


On the engine's catalytic converter there is a lambda oxygen sensor installed right after the exhaust turbo. This oxygen sensor is a broadband sensor which gives exact values across a wide measuring range. The measured value from the oxygen sensor and the measured air mass from HFM (hot filament air mass sensor) is used to determine a quantity mean value for all cylinders. This value is then compared to the injection quantity that is indicated in the engine control unit. If there is a difference the air mass is adapted to the actual quantity of fuel by adjusting the valve for the engine's exhaust recirculation in such a way that correct lambda value is set.

Restoring adaptation data for quantity mean value is a procedure for adjusting the fuel-air ratio correctly. This function does not affect any injectors individually.

This function must be run if any of the following components have been replaced.

Test conditions:

Procedure:

  1. Start the function.

  2. Adaptation data for quantity mean value is restored.

  3. Function done.