Quote:
Originally Posted by edogg
Interesting information about the DME retarding ignition timing. Is that why I feel more engine/compression braking when I let off the gas pedal?
|
No. You feel more engine braking because the shifting program has been changed to hold a lower gear longer.
The DME changes to engine timing, and the DDE changes to fuel injection, last only milliseconds. They occur during the shift, not before or after it. During the shift, engine power is automatically reduced by the DDE and DME to make the shift smoother (in all modes). It makes it feel smoother, reduces the load on the clutches, makes the transmission last longer, and keeps the fluid cleaner, all by reducing slipping of the clutch plates.
__________________
2007 X3 3.0si, 6 MT, Premium, White
Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
|