2011 Ford Fiesta & 1994 Pontiac Bonneville SSEi
2011 Ford Fiesta S-trim(sedan) w/ 6speed Dual-clutch Powershift. (Servo controlled)
Engine On/Off Coasting, both works flawlessly. No Tq converter so no lock-up. The AT/Computer keeps Power/Tq to the wheels at ALL time.
E(ON)C... If in 6th/70mph@~2600rpms at start of coast, end up at 25mph, the gearbox will downshift automatically to corrispond with the rate of speed. that includes down-shifting to either 5th/~45mph down to 4th/~35mph, and so-on down to the next gear to match speed
E(Off)C, key in (Acc/On Mode).. Take the same instance above, while engine is off, the Computer/Tranny will still downshift according to rate of speed. Restart engine whenever its time to shift back into (D)
E(Off)C, Key (OFF mode)... Start coast at any speed>switch to (N)>Turn key "Off'>Reach determined coast-down speed>Restart engine.. At this point While still in (N), the computer/trans has/should already have the gear selected to corrispond with the rate of speed before switching back to (D)
*Since this setup is to keep Power/Tq to the wheels at all time while in (D) except for at a full stop w/brake pedal active(which dis-engages the clutch/gear to elliminate friction losses). When re-entering (D) at speed, the engine will automatically rev-up to rpms to match Trans ratio/Rate of speed, to return power instantly to the wheels without any interaction with the "GO" pedal... There is a small continuos ammount of engine breaking, but with no sustained damage to the drivetrain.
<^>To counteract this event, about 5% added throttle will elliminate any engine breaking, once the engine is at load, then a steady press on "GO pedal" for smooth sailing.
**IF for any reason you are "E(OFF)C, in (Acc/On mode)" and accidently shift back to (D) with the engine Still OFF, the clutch does not engage! Further more will not burn up the clutch(s) or ruin the engine/drivetrain. In this case you must shift back to (N)>turn Key OFF completely>Restart, then engage into (D) from (N)... Is the safest way.
IN ANOTHER WORLD: Would NOT recommend ANY coasting in a 1994 Pontiac Bonneville SSEi other than, E(ON)C, Still in Drive ...Sounds like the spawn of satan trying to escape through the tranny otherwise!
Last edited by RiderofBikes; 08-09-2012 at 12:11 PM..
|