Regen philosophy - Diesel Forum

Wolley · 03-09-2008, 02:32 PM

Question;
A buddy of mine is about to buy an 08 Job 2 truck and he is concerned about the truck going into regen while parked or sitting at a stoplight.
Has Ford changed the parameters to inhibit regen until the truck is moving?
It just seems silly and dangerous to allow a regen while idling.
He will be fulltiming and is worried that it will start a regen while he is hooking, unhooking or doing the 20 other things one must do while pulling a fiver.

finchturf · 03-09-2008, 03:32 PM

Truck shoudn't regen with your foot on the brake. If its in neutral or park, it can.

GrampyJim · 03-09-2008, 03:33 PM

For some time, Ford has told us a new computer strategy is coming.... My understanding is that one thing this reflash will address is regens while idling. When we will see it is up for conjecture.

timid1 · 03-09-2008, 03:38 PM

2500 miles so far and I'm not so sure I understand how regen works. I haven't been able to find a consistent explanation of the conditions in which either an active or passive regeneration can occur. What I have seen, by experience, is that my F250 will kick the idle up to about 1200 RPM when it's in park and the parking brake is applied--but this only happens once in a while. And it goes back down to 500-700 RPM when I apply the brake or put it into drive.

jhughd · 03-09-2008, 03:51 PM

timid1 is correct. Regen should not be a problem hooking up or unhooking a fiver. I do it all the time. Might get a little warm if you are standing by the exhaust when in regen, other than that the only way you will know it is regening is by the rpm. The only way to shift from park is to apply the brake, and that stops the regen.

JD

Wolley · 03-09-2008, 08:32 PM

It's not the hooking or unhooking that would concern me but all of the things that get done while the truck is sitting there idling. Pulling chocks, picking up blocks, lifting landing legs, plugging in, securing the hitch, and fifteen other things that could possibly put one in front a hot exhaust.

rlchv70 · 03-09-2008, 10:44 PM

It shouldn't be an issue. The exhaust will be hotter, but not dangerously so as long as you aren't up against the tip. It's just like any exhaust on your lawn mower, motorcycle, etc. It will be hot!

Putting your foot on the brake during a regen does NOT stop the regen. It just brings the idle back down.

A passive regen is a regen where the normal operation of the engine causes the DPF to burn off the soot. The Ford system doesn't do this very well. An active regen is where the computer injects extra fuel during the exhaust stroke and a few other things to force the DPF to burn off the soot.

timid1 · 03-09-2008, 11:15 PM

Quote:

Originally Posted by rlchv70

A passive regen is a regen where the normal operation of the engine causes the DPF to burn off the soot. The Ford system doesn't do this very well. An active regen is where the computer injects extra fuel during the exhaust stroke and a few other things to force the DPF to burn off the soot.

Not sure this helps me understand. My truck doesn't tell me when it's in regen mode (passive or active). Seems to me that the only way I'll know is RPM's in park or while in motion the limit of boost.

rlchv70 · 03-10-2008, 05:56 AM

Quote:

Originally Posted by timid1

Not sure this helps me understand. My truck doesn't tell me when it's in regen mode (passive or active). Seems to me that the only way I'll know is RPM's in park or while in motion the limit of boost.

Passive regen isn't a "mode". It is normal operation.

As for an active regen, why do you need to know? It is deliberately programmed to be as inobtrusive as possible.

t613 · 03-10-2008, 08:09 AM

I think I had my first one yesterday (700 miles on truck). I was taking off from a light, heard a strange "farting" noise", looked in my right side mirror and saw a small cloud of bluish-white smoke. Not a lot, but enough to make the car behind me veer to his right! I hope this is "normal". Otherwise, the truck is GREAT!

newbie_101 · 03-10-2008, 09:38 AM

Quote:

Originally Posted by GrampyJim

For some time, Ford has told us a new computer strategy is coming.... My understanding is that one thing this reflash will address is regens while idling. When we will see it is up for conjecture.

I sure hope they're not thinking about moving to a strategy similar to the other players. In my mind this is where Ford has the upper hand with the ability to actively regenerate while under 30 mph or in park.

Wolley · 03-10-2008, 02:53 PM

Quote:

Originally Posted by newbie_101

I sure hope they're not thinking about moving to a strategy similar to the other players. In my mind this is where Ford has the upper hand with the ability to actively regenerate while under 30 mph or in park.

Somehow I fail to see how an unsafe condition is an advantage.
Ford never really has had much of an aversion to fire anyway.

newbie_101 · 03-10-2008, 03:24 PM

How is this dangerous? A little common sense should prevail.