Transient overboost on the TDCI

[damian s]

maybe someone here knows about it.

I know it increases the boost for a few seconds after flooring it, but does anyone know what conditions cause it to happen? maybe foot down below a certain rpm range, only when the revs are below a certain range etc etc.

any info welcome

[plfrench]

Bump.

Good question, I'd like to know too, although probably not noticable on mine...

Paul.

[nighthawk]

in basic terms, under hard acceleration the management system will allow higher boost pressures than normal and supply fueling accordingly, mondeo goes from 360Nm to 400Nm under these conditions.

[damian s]

Thats quite a difference on the mondeo, the increase is less on the 2.0tdci engine isnt it? . any chance of the further details?

Im guessing that it only provides extra boost when:

engine is up to running temp
hit full throttle
revs are below 3krpm
gear is 3rd or above