A320 family CFM engines IDG oil...
CFMs for the oil cooling by the fuel...
The fuel recirculation system returns the warm fuel from the fuel cooled IDG oil cooler to the wing tank. The FADEC stops the recirculation system if:
- the fuel temperature increases to a high level
- the fuel flow rate to the engine is at a high level
- the engines have a gravity fuel feed only
- the fuel level in the wing tanks is low
- the fuel goes into a vent surge tank.
There is also a thermocouple in the IDG limiting the oil coming in thought the cooler that's temperature dependant. I seem to recall between 70-85°C it's open, but can't find the reference at the moment though
Last edited by compressor stall; 27th Nov 2011 at 09:28.
Reason: Omitted a preposition that changed the meaning....