Why does this seem to be catching on?

[Racer X 69]

(Racer, .. you got it bass-ackwards again. The evaporator is the cold part inside the cab, the condenser is the hot part by the radiator.)

I told you I can't ****in' remember.

 

[GAnthony]

That's exactly what's going on. (except the DEF part)

During a parked REGEN, the engine picks up RPM and something called a "doser valve" literally wastes fuel by injecting it directly into that tin can under the passenger side of the truck, and heats the thing up to burn off soot that has built up on the DPF filter.

I don't know why the engines rev up. On several trucks I've driven, model years 2007 & 2008, the engines run about 1100-1200 RPM but with the fan going, it sounds like it's redlined. Newer trucks, a 2010 with a 2009 engine I had, only went up to about 800 RPM during a parked regen.

I believe the fan only runs during the REGEN for the purpose of keeping the temperatures down under the cab, so it doesn't start melting stuff. During a parked REGEN, that tin can gets so hot, and with the fan going, in the middle of winter, if you don't have side skirts you can stand behind the cab, next to the frame and you'll be toasty warm.

So then the idiot in Reno was doing a "Parked Regen" all night?
How long does a "Parked Regen" last?
The SWIFT in Wyoming was an older Columbia and had no DPF as far as I could tell.
I still think it's just poorly trained dummies running their engines at high RPM.....But I could be wrong!

I had to do a park re-gen a few nights ago. there is an upside down yellow triangle that lights up on the dash panel.

my truck took all of about 30 minutes to do this, at a high RPM. (which was ok for me at the time, as i had to unload/reload my trailer, and that took 45 minutes.

the mechanic at Penske told me previously, it takes "about an hour", and that the exhaust gets super hot, like 1,000 degree's, how true that, i cannot say.

the engine by the way, shuts down when the re-gen is done, at least mine did.

my truck does not have the DEF tank either.

 

[Racer X 69]

. . . . . the exhaust gets super hot, like 1,000 degree's, how true that, i cannot say.

More like 1300 to 1500 degrees. Fahrenheit.

 

[GAnthony]

More like 1300 to 1500 degrees. Fahrenheit.

ok thanks, so at least i did hear the temps were very high, just couldn't remember exactly what he had said.

 

[Whirlwind]

Only once did I have a truck with the regen DPF system that needed parked regens. They are supposed to do that while driving, but I had one truck where it didn't seem to work right, and I had to do parked regens now and then.

 

[Duck]

Only once did I have a truck with the regen DPF system that needed parked regens. They are supposed to do that while driving, but I had one truck where it didn't seem to work right, and I had to do parked regens now and then.

Every Volvo I've had with the DPF system on it, I've had to do parked regens periodically, even though they would still do them going down the road.

But the Kenworths, with the same Cummins ISX engines as the Volvos, wouldn't require a parked regen, and if you try to do one, it won't happen. They won't do a manual parked regen if they don't need it.

 

[blackw900]

Sounds like another perfectly good reason to keep my KW til I retire....If I ever decide to retire.

 

[GAnthony]

Only once did I have a truck with the regen DPF system that needed parked regens. They are supposed to do that while driving, but I had one truck where it didn't seem to work right, and I had to do parked regens now and then.

yes, mine usually does it on it's own as well, but twice now it had to be manually done. once by Penske (about 3 weeks ago), and just last week by me. the codes showed a clog tube or something.

Every Volvo I've had with the DPF system on it, I've had to do parked regens periodically, even though they would still do them going down the road.

But the Kenworths, with the same Cummins ISX engines as the Volvos, wouldn't require a parked regen, and if you try to do one, it won't happen. They won't do a manual parked regen if they don't need it.

with mine, if the upside down yellow triangle shows up, it's ready for it. i have not tried doing it when that light isn't lit up. and i have the cummins ISX motor as well, in my IH.

 

[Gased]

I'm thinkin that they were doin an exhaust system "regen". Cleaning the exhaust filter. You know...that emissions crap. That's what the DEF fluid is for.

I was going to say that.

More like 1300 to 1500 degrees. Fahrenheit.

Yep. Now, can this damage the engine? We are having some serious issues with our Prostars and the DPF/ Regen crap.

Sounds like another perfectly good reason to keep my KW til I retire....If I ever decide to retire.

Safe move.

 

[Racer X 69]

Yep. Now, can this damage the engine? We are having some serious issues with our Prostars and the DPF/ Regen crap.

Those temps are supposed to be inside the DPF, which is away from the engine. But the whole leanburn for lower tailpipe emissions is hard on any engine, gasoline or diesel.

 

[Racer X 69]

with mine, if the upside down yellow triangle shows up, it's ready for it. i have not tried doing it when that light isn't lit up. and i have the cummins ISX motor as well, in my IH.

The systems I have hands on experience with only guess when the DPF is full and needs a regen. The whole system is nothing but a computer guess as to how and when this needs to be done in a big truck.

An engineer I talked with who had worked for Ford on the Powerstroke afertreatment systems told me that they use pressure sensors upstream and downstream of the DPF to measure a drop is pressure, and determine when it is time to do a regen.

Makes more sense than the heavy truck systems I worked on.

 

[Duck]

The systems I have hands on experience with only guess when the DPF is full and needs a regen. The whole system is nothing but a computer guess as to how and when this needs to be done in a big truck.

An engineer I talked with who had worked for Ford on the Powerstroke afertreatment systems told me that they use pressure sensors upstream and downstream of the DPF to measure a drop is pressure, and determine when it is time to do a regen.

Makes more sense than the heavy truck systems I worked on.

I gotta get me a 2006 or older diesel pickup with low miles and a stick-shift, and keep it forever. And ever.

In fact I'll be 80 yrs old and still not have a vehicle with that EPA-mandated bull**** on it. I won't drive a hybrid or anything designed to run on ethanol either.