regen frequency

[Newsa]

Just to be clear running lower rpms is not lugging. Just running lower rpms with a light highway load can increase or decrease EGTs based on load/rpms.

Cummins defines lugging as “Engine "lugging" is defined as operating under a load great enough that engine speed can not increase at wide open throttle (assuming that the governor is not cutting the throttle).”

It can technically happen at any rpm. Cummins also say full throttle below peak torque should be limited to 60 seconds max, and avoided if possible.

Yes, thanks for the response. I have seen the definition of lugging on this forum before. Posted by Bob 4x4, I think. But I didn't know that was Cummins definition of lugging. I thought it was just the diesel definition of lugging

I even have my throttle sensiticity booster set on valet mode (lower throttle than stock .. I think it is about 60-70%) when I do it so as to have extra precaution. And the 6.7 never fails to slowly accelerate. The T'S booster actually won't let me do 100 % throttle when on valet mode. I actually keep it in valet mode 95% of the time. It helps my clown foot accelerate more smoothly

 

[AH64ID]

It's probably a general definition, but I have seen it in Cummins literature.

 

[Too Tall]

Down here in coonass country, we call it "bogging it down"

 

[Newsa]

After 2800 miles of highway, the DPF should be clean as a whistle.

I thought it (DPF) would be clean as a whistle after we evacuated for hurricane Irma and drove nearly 1500 miles from Miami to N Ga. And back. But a few weeks later was when the DPF needed a forced regen at the dealers. It's only needed that once in the nearly 4 1/2 years I've had it

 

[Cummins12V98]

I've been at 2000 and a bit over. But I only have one overdrive gear

I am no stick expert but isn't 5 & 6 OD gears?

 

[AH64ID]

I am no stick expert but isn't 5 & 6 OD gears?

5th is direct and 6th is OD.

 

[Newsa]

5th is 1:1 on the g56 B version (second gen g56?) from my understanding. There was a change in the g56 ratios a few years ago, but I'm not exactly certain what the change was.

In the current production g56 (including mine), there is only one overdrive gear and some have suggested that is why towing heavy in 5th is much better for the transmission.

Also, I'm not up to snuff on the NV 4500 and NV 5600. Maybe they had 2 overdrive gears???? But I doubt it. One of those only had 5 gears....


Edit: Oh. I didn't see John already answered this more succinctly

 

[AH64ID]

05.5-07.3was a G56AD with approx 6% lower 1-4 and 6.

07.4-current is G56AE with the taller gears, and only 5th is the same.

NV5600 is a 6 speed and the NV4500 is a 5 speed.



I’d love to see a 7 speed with 2 OD’s and a clutch to handle the 900+ lb/ft the Aisin gets.

 

[Newsa]

I’d love to see a 7 speed with 2 OD’s and a clutch to handle the 900+ lb/ft the Aisin gets.

Me too. But they won't invest in the design of a new manual transmission. Not enough buyers.

 

[Newsa]

After 2800 miles of highway, the DPF should be clean as a whistle.

I returned from the 2800 mile trip on Saturday 1/6/18. Sunday 1/7/18, i made a 2 mile trip to the grocery store and back.

This morning 1/8/18, I get a message while on the hwy to work that the DPF is 100% full and it is regenerating.

Seems like maybe the DPF wasn't clean as a whistle???????( after my 2800 mile trip)

I'm guessing maybe on the 2800 mile trip, it may have done an active regen at 2200'-2300 miles. And it was about to do another regen when i finished my trip?

But it didn't get to that last regen and shut down after the trip with a DPF full of soot????

I did experience some cold ambient temps on my trip. But doubt that would affect regens?

 

[Too Tall]

I returned from the 2800 mile trip on Saturday 1/6/18. Sunday 1/7/18, i made a 2 mile trip to the grocery store and back.

This morning 1/8/18, I get a message while on the hwy to work that the DPF is 100% full and it is regenerating.

Seems like maybe the DPF wasn't clean as a whistle???????( after my 2800 mile trip)

I'm guessing maybe on the 2800 mile trip, it may have done an active regen at 2200'-2300 miles. And it was about to do another regen when i finished my trip?

But it didn't get to that last regen and shut down after the trip with a DPF full of soot????

I did experience some cold ambient temps on my trip. But doubt that would affect regens?

I agree, after 2800 miles, 2 short trips is not going to plug the DPF. IMO, nothing other than a mechanical problem would cause a full DPF after that trip. I guess you'll find out.

 

[Cummins12V98]

5th is direct and 6th is OD.

Thanks! I knew my 98 with 5 speed 5th was OD.

 

[AH64ID]

Thanks! I knew my 98 with 5 speed 5th was OD.

They added the extra gear between 1 and 4, which basically split 3rd into 3/4. It's a great improvement for towing.

 

[y2k17ram]

To see when I'm in active regen, I use Torque Pro.
I found a custom pid for Torque that shows me DPF status. When DPF status goes to 100%, active regen starts. ....

Same here - ODB II dongle talking to my tablet running Torque Pro. When it starts a regen I jump on the highway and run normal highway speed (65'ish MPH) 'til the EGT's come back down. Since doing this - starting in Dec...

Date - Mileage - Miles
12/16/17 - 3,840
01/14/18 - 4,653 - 813
02/02/18 - 5,240 - 587
02/23/18 - 6,113 - 873
03/19/18 - 6,985 - 872

I haven't been logging engine hours - maybe I'll start

 

[TERRA]

M35a2- Please direct me to where did you found that custom Torque pid that shows DPF status and the one that show that the EGR is closed. My DPFPres gauge occasionally shows values in the 6 figures so it must have a bug and the DPFTemp never shows any value. THANKS

 

[y2k17ram]

This is the PID I use for DPF Status - it works on newer 6.7's

Name
DPF: Status

Short Name
DPF Status

Mode and PID
018B

Equation
(C*100)/255

Min Value
0

Max Value
100

Units
%

Header
Auto

 

[TERRA]

y2k17ram - thanks

 

[6V92TA]

I'm going to quote the Cummins ISB 6.7 service manual here, I am not sure if the parameters are different on a Ram truck but they should be similar QUOTE"" Aftertreatment injection requires that temperatures in the aftertreatment system reach approximately 288°C [550°F]. At this temperature and above, the small quantities of fuel injected into the exhaust will properly oxidize across the aftertreatment diesel oxidation catalyst, creating the additional heat required to actively regenerate the aftertreatment diesel particulate filter.

During active regeneration, the ECM monitors the exhaust temperatures before and after the aftertreatment diesel particulate filter and maintains the temperatures in a range of approximately 482 to 649°C [900 to 1200°F]. The quantity of fuel used for aftertreatment injection will vary as the temperature is controlled within these limits.

The temperatures achieved during active regeneration are typically higher than those achieved during passive regeneration. The conversion of soot to carbon dioxide occurs much faster as temperatures increase.

A typical active regeneration event will take approximately 20 to 40 minutes to complete while the vehicle is operating. This time can vary depending on the application. The vehicle operator may notice additional turbocharger noise during this time, along with an illuminated high exhaust temperature lamp, if equipped.

The frequency at which an engine will require an active regeneration varies greatly from application to application. In general, vehicles with a low vehicle speed, such as urban vehicles, or a low-load duty cycle, will require more active regeneration events than a heavily loaded vehicle or a vehicle with a highway speed duty cycle.

The ECM also contains a time-based feature for active regenerations which is used to verify correct aftertreatment operation when the vehicle duty cycle is typically high enough that active regeneration events are not necessary.

If the engine has not completed an active regeneration within the last 100 hours of operation, the ECM will call for a time-based active regeneration event.

The 100-hour timer resets each time the ECM detects that an active regeneration event has been completed"". QUOTE

 

[Newsa]

I'm going to quote the Cummins ISB 6.7 service manual here, I am not sure if the parameters are different on a Ram truck but they should be similar QUOTE"" Aftertreatment injection requires that temperatures in the aftertreatment system reach approximately 288°C [550°F]. At this temperature and above, the small quantities of fuel injected into the exhaust will properly oxidize across the aftertreatment diesel oxidation catalyst, creating the additional heat required to actively regenerate the aftertreatment diesel particulate filter.

During active regeneration, the ECM monitors the exhaust temperatures before and after the aftertreatment diesel particulate filter and maintains the temperatures in a range of approximately 482 to 649°C [900 to 1200°F]. The quantity of fuel used for aftertreatment injection will vary as the temperature is controlled within these limits.

The temperatures achieved during active regeneration are typically higher than those achieved during passive regeneration. The conversion of soot to carbon dioxide occurs much faster as temperatures increase.

A typical active regeneration event will take approximately 20 to 40 minutes to complete while the vehicle is operating. This time can vary depending on the application. The vehicle operator may notice additional turbocharger noise during this time, along with an illuminated high exhaust temperature lamp, if equipped.

The frequency at which an engine will require an active regeneration varies greatly from application to application. In general, vehicles with a low vehicle speed, such as urban vehicles, or a low-load duty cycle, will require more active regeneration events than a heavily loaded vehicle or a vehicle with a highway speed duty cycle.

The ECM also contains a time-based feature for active regenerations which is used to verify correct aftertreatment operation when the vehicle duty cycle is typically high enough that active regeneration events are not necessary.

If the engine has not completed an active regeneration within the last 100 hours of operation, the ECM will call for a time-based active regeneration event.

The 100-hour timer resets each time the ECM detects that an active regeneration event has been completed""

What year is that for? The ram trucks don't have "after injection "

 

[6V92TA]

Newsa, that is generic information for any current Cummins ISB straight from the Cummins Service manual...as I stated it may not be exactly done that way on a Ram pickup but it is going to be close as Cummins manufactures the engine and the exhaust aftertreatment for the Ram.. anyway, when they refer to aftertreatment injection, what they are referring to is with a HPCR fuel system they also have the ability to inject small amounts of fuel on the exhaust stroke, which acts as an oxidizer for regeneration..