07-06-2006, 10:03 PM
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Escape Hybrid Enthusiast
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Real Name: Phillip
Location: Tucker, GA
Hybrids: 2005 FEH 4WD
Posts: 137
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Re: Question about transmission and "park"
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Originally Posted by Tim K
As I understand it, the CVT doesn't actually have any gears at all and the shifter is nothing more than a drive-by-wire system for telling the computer what direction to run the motors.
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I could be wrong but it seem the eCVT does use gears. First check out '2005 MY OBD System Operation' pdf - page 5 and then page 7. The graphics show the 'Planetary Gear Set' between the ICE and Generator & Traction Motors. Well just what is a 'Planetary Gear System' and how does it work? Check out 'Planetary Gearing' on Wikipedia.
But I could be totally wrong and the FEH uses a version of the 'Hybrid Synergy Drive system', actually if you read on down in the article it says -
Ford Motor Company has independently developed their own hybrid technology which works basically identically to HSD.
Also look at Electronically-controlled CVT at Wikipedia.
I would say the 'Power Split Device' as shown at Graham's Toyota Prius is actually the 'Planetary Gear System' as shown on page 7 of the '2005 MY OBD System Operation' pdf on the FEH. Could be a Hybrid version of both - guess it is.
As far as how the mechanics of the 'Park' works I can't find - guess someone with a shop manual will have to give the answer to that. Anyone ever mistakenly pushed the shifter into 'P' while moving? I have - If I remember correctly, there was the sound of something grinding. Yes, the gear shift lever (as well as the gas pedal) is 'Fly by Wire' and the PCM along with the TCM controls gearing/torque etc.
Could be wrong - Probably am - Heck I just Love to Drive my FEH!!
Last edited by VietVet'67; 07-07-2006 at 08:47 AM.
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