Fuel Dilution strategies

[MichaelOverfield]

Difference in Regen for towing and not towing: EGTs are going to be higher with less extra fuel dumped in the exhaust when towing, than when not towing. The system seems to struggle to get the needed Regen temps with an engine under light load conditions. The amount of fuel added in post injection that coats the cylinder walls and finds its way into your oil is the culprit in fuel dilution in the oil. The only fix to fuel dilution is to prevent regens from happening, and that is not going to work with emissions. Now the way the truck is used and limits on short low load drives and limits on idle times, things like that might help, but you will not completely solve the issue.

As to "Bluetec" my 2009 also has the badge, it is NOT limited to the SCR/DEF Emissions systems, FCA was Daimler-Chrysler when that system was first put on these trucks, and that is where it came from. It was also in those years when they went away from the NV5600 transmission to the G56 Mercedes transmission.

 

[cerberusiam]

As to "Bluetec" my 2009 also has the badge, it is NOT limited to the SCR/DEF Emissions systems, FCA was Daimler-Chrysler when that system was first put on these trucks, and that is where it came from. It was also in those years when they went away from the NV5600 transmission to the G56 Mercedes transmission.

BlueTec is marketing label for MERCEDES diesel engine cars, last I checked the engines in these trucks were built by CUMMINS not MERCEDES. DCA slapped labels on stuff for marketing purposes and that was all. In addition, BlueTec included SCR which in now way was on these trucks in 2009. Unless you are somehow going to say that multiple injection events, DPF, and common rail technology HAD to have been BlueTec it won't fly. Bosch built the fuel systems, Cummins designed the EGR system and control system, Dodge selected the exhaust system. Wher ein that multi supplied\designer\builder did Mercedes have anything to say about it? You can put lip stick on a pig and call it a beauty queen but it don't make it so.

Better check your years on the transmissions a lot closer. The NV 5600 was last installed in these trucks in 2004, not anywhere near in the time frame of 2009 and had nothing to do with anything labeled BlueTec.

 

[MichaelOverfield]

Well, you might have missed the press release on the subject, and I did not say the transmission had anything to do with Bluetec, it DID have everything to do with the Daimler-Chrysler years, that was my point. https://dieselnet.com/news/2007/01daimler.php

 

[MichaelOverfield]

Here is the pull quote from the article I linked in the last post: "The truck is the first BLUETEC vehicle from the Chrysler Group. It combines advanced in-cylinder technologies, including a Bosch flexible 1800 bar high pressure common-rail fuel system, Cummins next-generation cooled exhaust gas recirculation (EGR) and variable geometry turbocharger (VGT), with advanced exhaust aftertreatment technology. The aftertreatment system includes a close-coupled diesel oxidation catalyst, a NOx adsorber catalyst and a combined diesel oxidation/particulate filter. The engine also incorporates a closed crankcase ventilation (CCV) system. It is the first diesel vehicle on the market that meets the 2010 emission standards for heavy-duty engines (NOx = 0.2 g/bhp-hr, PM = 0.01 g/bhp-hr), and one of the first commercial applications of the NOx adsorber technology on a diesel engine."

 

[MichaelOverfield]

Daimler-Chrysler years: 1998-2007: NV 5600 change to G56 was right there in those years, not a coincidence. https://en.wikipedia.org/wiki/Daimler_AG

 

[cerberusiam]

I reiterate, the last NV5600 was installed in these trucks in MY04. Just go to show how wrong all these web articles can be. Same as the 600 ft\lbs at 1600 rpms, made good marketing glitz for sure.

 

[MichaelOverfield]

Yes, the NV5600 was a short production run, and New Venture Gear company seems to be out of business. My 2009 still has a New Venture Gear transfer case. OEMs source all over the place and will also deplete inventory before making a change in a supplier. It would appear that Daimler-Chrysler used all the NV5600 units that were produced, then when depleted, switched to the G56. Just because they took over would not mean they would immediately discard parts and existing supply chains... It seems not much of a coincidence that they then picked the G56, a Mercedes transmission, and still used that in the FCA years, until they stopped the Manual option entirely, which was MY19 or 20 if I recall correctly. https://en.wikipedia.org/wiki/New_Venture_Gear

 

[cerberusiam]

Like I said before BlueTec was just a marketing thing that included a little decal and meant nothing in the real world as applied to the Cummins engine. Everything the list as being so special was developed by someone else, not Mercedes. Every single part of the emissions system on an 09 had already been there for several years and no sign of decal that tried to take credit for something. My 07 had no different parts than your 09 and it never had a decal.

Daimler was already out of Chrysler group by the time your cute little decals came about so never really had any input in the whole process. That whole Bluetec thing lasted until Daimler trade marked it and then no one could use it. SCR is an integral part of the BlueTec system and that never happened until 2013 long after Daimler was gone.

Cummins included all the emissions parts on those engines used in a lot different platforms. The sad part is they were much more effective and less error prone everywhere EXCEPT the Dodge trucks. Only took Dodge 4 years to figure out the programming to make it a little better and 7 years to finally have to go to SCR, and that was all Cummins NOT owned in any part by Daimler.

 

[MichaelOverfield]

I know you keep saying that the system was not "Bluetec" but the ample data says otherwise, it is more than the stupid badge. You are saying that because you think Bluetec is only for SCR, but it can be BOTH SCR and LNT... They produced BOTH systems. Just because it was after the Daimler-Chrysler years, does not mean Chrysler LLC could not buy that system, they bought the G56 from Mercedes... https://www.consumerreports.org/cro...-the-2009-clean-diesel-suvs-to-come/index.htm;https://www.thecarconnection.com/news/1034250_driven-2009-dodge-ram-2500-heavy-duty-bluetec, https://www.greencarcongress.com/2007/01/daimlerchrysler_2.html And this presentation shows Bluetec, using BOTH LNT and SCR... https://www.energy.gov/sites/prod/files/2014/03/f9/2006_deer_godwin.pdf

 

[MichaelOverfield]

"Given that Chrysler was owned by Daimler for nearly a decade, it should not come as a surprise that, during that period, Mercedes and Chrysler shared diesel technologies. So it's also not surprising that Chrysler is now working some BLUETEC magic of its own. The 2007 Dodge Ram 2500 and 2007 Dodge Ram 3500 heavy duty trucks -- powered by the Cummins 6.7-liter Turbodiesel engine -- are Chrysler's first BLUETEC Vehicles.

The Cummins 6.7-liter Turbodiesel engine also delivers better fuel economy when compared to equivalent gasoline engines, says Chrysler. And earlier this year, at the Washington Auto Show, the U.S. Environmental Protection Agency, together with the Department of Energy, tapped the new 2007 Dodge Ram Heavy Duty as the cleanest mass-production diesel-engine pickup truck on the market." http://edition.cnn.com/2007/LIVING/wayoflife/12/12/aa.diesels.not.dirty/index.html

 

[MichaelOverfield]

Ok, one more: "New 2007 Dodge Ram 2500 and 3500 with Cummins 6.7-liter turbodiesel engine is first Chrysler Group BLUETEC vehicle and first to meet stringent 2010 truck emissions standards in all 50 states" Your 2007 6.7 actually DID have Bluetec, whether the badge was there or not, because that is the technology that was used for the emissions system. This article is from 2007 when it came out: https://www.topspeed.com/cars/car-n...t-heavy-duty-diesel-pickup-truck-ar25867.html