I can give foundation from Ford for my statement, can you?

http://media.ford.com/article_displa...ticle_id=24795

 

I read that article or interview with Mr. Rodrigues also. Since he is local to me I got his home phone and almost called but didn't. It is incorrect.

That appeared in a Ford Fusion forum along with a link to a Ford site showing a selectable moving graphic on different roads conditions. It was pulled sometime in 2009 because it was incorrect as is Mr. Rodrigues.

Oh yeah, I own a Ford 4WD/AWD Escape, know how it works because I actually connected a scope to the 4WD module output. It doesn't work the way Mr. Rodrigues states in that interview.

I actually believed it work as described in that interview till I found out better!

Here's a link to the thread which includes the since removed graphic which is picture and a link to it in the thread: http://www.fordfusionforum.com/topic...eaded&pid=6557.

 

Ther last I knew you hadn't found any way to correlate PWM dutycycle with the electromagnetic clutch's coupling coefficient. Insofar as we know a 20% dutycycle "on" period could simply be a "keep-alive" level, 5% coupling, and 35% dutycycle a 100% coupling, 50/50 F/R.

 

...

 

Op was asking about a 2008...

What year is your "AWD" Escape and how does the "AWD" operation differ from that described in the article..?

 

It's a 2009 FE, it's the same as a 2008. You never have more than around 35% rear wheel torque even when it's floored.

A pinpoint test right from the manual states for the tech to command 100% rear wheel torque and if the vehicle resists turning, return the vehicle to the customer as it's working as it should. That in itself shows that Mr. Rodrigues was incorrect.

 

It's an electro-mechanical clutch, on/off and this case PWM at 1kHz for control.

 

"..working as it should.." Means nothing, simple parallel/analog to MANUALLY putting my Jeep in locked differential mode and then trying to turn somewhat tightly on a tractive surface. Bears no relation to what the system does, or does not do, automatically.

Also, is it true that your 2009 has TC/VSC while the 2008 does not?

 

Question: Since we both know that whatever system is used the opposite drive cannot be continuously engaged absent some method for slippage, open center diff, VC (rubber-bandish coupling), etc, how would you suggest the Escape system operate so as to pre-emptively alleviate slippage and thereby prevent instances of loss of directional control on a predominantly FWD vehicle?

 

Those have been my experiences. Last week I was on an icy gravel incline, trying to park. What a pain, my old Pontiac Sunfire would have handled it much much better. My next one (yes I will be buying it used) will be AWD.