MPG and Range on the Ecodiesel

Compression-Ignition

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My experience echoes yours. My regens start at 80% and drop it down to 10%. If I interrupt the process, it won't recur until it reaches 80% again. Two other random observations:
  • Recently I was running an errand when a regen started. I experimented by leaving the Jeep running, locking the door, and running in to pick up my lunch - hoping the process would continue. It was still showing "on" when I exited the truck. Five minutes later, when I returned to the parking lot, the regen had stopped at some point midstream. Maybe as soon as I locked the door?
  • On two occasions the regen seemed to "get stuck" at a lower level, like 40%, and wouldn't drop any further. When I stopped the Jeep, the level immediately dropped to 10%. Not sure if it was a Scangauge issue or a Jeep issue as to why the display froze.
I think this is due to the sensors and their reporting scheme. Both of my newer diesel vehicles do this. The display showing the soot mass load seems to jump erratically the closer to 'empty' it gets. Steady fall from 78-80 and then somewhere around the 30's and 20's it jumps way down. Also they both seem to shoot past the low point and then bounce around there before they start their normal steady climb.

I don't believe there is anything wrong when this happens. Seems kinda sorta similar to how your distance to empty or range display will fluctuate. Nothing is really changing except the computers interpretation of the information it is seeing. Apples and oranges comparison I know.





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Capricorn

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Also curious how ESS behaves during active regen. I hope it goes into "not ready" mode during the process.
 

Compression-Ignition

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Also curious how ESS behaves during active regen. I hope it goes into "not ready" mode during the process.
I wouldn't know. We bought the little deal that keeps it on one setting all the time, which we have it set to off.
 

BuffaloBill

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I think this is due to the sensors and their reporting scheme. Both of my newer diesel vehicles do this. The display showing the soot mass load seems to jump erratically the closer to 'empty' it gets. Steady fall from 78-80 and then somewhere around the 30's and 20's it jumps way down. Also they both seem to shoot past the low point and then bounce around there before they start their normal steady climb.

I don't believe there is anything wrong when this happens. Seems kinda sorta similar to how your distance to empty or range display will fluctuate. Nothing is really changing except the computers interpretation of the information it is seeing. Apples and oranges comparison I know.
I believe a differential pressure sensor is used as the means to determine the amount of restriction from soot loading. I suppose as the restriction is becoming less and less, so is the pressure drop, and there’s less and less measurement resolution as it approaches 0%. So like you said, it‘s probably difficult to measure accurately down there.
 

MacnJill

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We just set off on a 3700+ mile road trip. Colorado Springs to Wilmington, NC. We had the oil changed this morning before setting out. Even though there’s less than 5k miles on the odometer. So far we are amazed at the results. This is all highway driving @70mph. My wife’s foot is lighter than mine! I’ll post our average once we get to our destination.

7F7F7008-D3F6-4AA3-83F1-1B8B54FD038A.jpeg
 

rickinAZ

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We just set off on a 3700+ mile road trip. Colorado Springs to Wilmington, NC. We had the oil changed this morning before setting out. Even though there’s less than 5k miles on the odometer. So far we are amazed at the results. This is all highway driving @70mph. My wife’s foot is lighter than mine! I’ll post our average once we get to our destination.

7F7F7008-D3F6-4AA3-83F1-1B8B54FD038A.jpeg
Mac, do you have a gauge to monitor your soot levels? It would be interesting to see if you can cross the country on passive regeneration only.
 

mtnmerlin

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Also curious how ESS behaves during active regen. I hope it goes into "not ready" mode during the process.
OH! This may explain my experience the other day. Driving across town (after the engine was warm) I thought it was weird that the ESS was not turning off the engine when stopped at traffic lights. Maybe it was because of a regeneration. It finally turned off the engine when I stopped in the driveway.
 

Compression-Ignition

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Mac, do you have a gauge to monitor your soot levels? It would be interesting to see if you can cross the country on passive regeneration only.
One or more of the folks here have pretty definitively stated that the system will perform an active regen no matter what the system status is every 800 miles.
 

rickinAZ

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One or more of the folks here have pretty definitively stated that the system will perform an active regen no matter what the system status is every 800 miles.
That’s right - I forgot about that.
 

MacnJill

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Mac, do you have a gauge to monitor your soot levels? It would be interesting to see if you can cross the country on passive regeneration only.
I don’t have such a device and 6500 I have yet to witness any regeneration. I think this is probably due to my 99% highway commute daily.
 

MacnJill

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So after driving from Colorado Springs to Wilmington,NC. We’ve averaged 26.5mpg. We could have achieved much higher mpg but there were thunderstorms and a strong headwind almost the entire way. Can’t wait to see what we get on the way back.
 

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Coronado

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So after driving from Colorado Springs to Wilmington,NC. We’ve averaged 26.5mpg. We could have achieved much higher mpg but there were thunderstorms and a strong headwind almost the entire way. Can’t wait to see what we get on the way back.
Impressive mileage especially with strong head winds. Thanks for posting-up. Awaiting delivery of my JLURD here in San Diego.
 

AZ-Chris

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I definitely noticed the ammonia smell during a regen while on the highway. Not pleasant at all.
 

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