i would bet they will shut down. same as the current engines will shut down if you don't perform a regen, either cuz of driver not being trained or mechanical fault. when the 07 model engines came out we had a lot of trucks towed in for regen because the drivers weren't told about the lights on the dash, so they would run the truck till it shut off, and once it did you couldn't drive it till we did a regen.

 

they should go into regen on their own...there is a manual regen mode but they should do it automatically when going down the road

 

An engine will automatically perform an active regeneration if you are going above a programmed speed, and will stop if you drop below another programmed speed. Cummins likes to default to 40 MPH starting/ 10 MPH stopping, but depending on ECM programming it might not happen in a particular vehicles duty cycle. I don't think you can program a Cummins to do an automatic regen below 10 MPH, could be wrong though...

Theoretically, according to Cummins literature, a vehicle operating at a high enough duty cycle will "passively regenerate" and never need to do an active regeneration.

Stationary, manual regenerations are triggered by the manual switch and are what you need to do if the vehicle won't automatically active regen or run hot enough for long enough to passive regen.

Clogged DPF's don't shut down the engine due to emissions reasons, they kill the engine because the engine can be damaged by trying to run with a 30+ PSI exhaust backpressure.


If a urea system malfunctions or stops working, however, it isn't going to affect the engine at all. I don't see why it would ever kill an engine. Actually, I completely fail to see what's stopping an operator from just not filling it up, or filling it up with water.

 

unless DOT will check the tank to see if it is empty at a normal roadside check...if that is the case they will probably make the drivers carry a log book for when they fill the urea tank...

If im not mistaken wont the Cummins already pass the 2010 emissions right now without UREA...im pretty sure they were the only major OTR engine maker that could claim that when they came out with 07 model engines...CAT couldnt and stopped making OTR engines all together, and Detroit has totally re designed there engine and electronics to help pass the 2010 emissions

 

I imagine there will be some sort of sensor in the urea tank that senses level and possibly, through some sort of magic voodoo, the contents of the tank.

 

I have heard $5-$7 a gallon and read "about $5/gal" in Diesel Power in the bluetec Mercedes article

 

Yeah, it's a "clarity" sensor. I want to say it senses temperature too? I guess it would not inject if it knows it's not urea.

What's going to keep somebody putting remote off switch on it then?

I just see it being a total waste of a mandate unless they really put some teeth into enforcing it.

How is it working in Europe?

 

There will probably be an ECM input required from the urea sensor to initiate engine operation--or perhaps they will give a fail safe, like say 10-15 drive cycles, without the ECM seeing something from the urea sensor before disabling engine operation.

I would doubt that an inoperative urea sensor would mean instant engine shutdown....they'd have to give the operator a "chance" to find more fluid before calling the tow truck.

Perhaps a NOx sensor in the exhaust system to make sure the urea injection system is working.

I suppose one could fab up a small tank and install the sensor in that so it had something to read.....dunno.

The Kruse urea, AdBlue or whatever, is like 17USD for a 64oz bottle...imagine once the vehicles start needing it there will be a huge mass of available brands.

I wonder if Amsoil urea will be better than the rest?

 

Our company has our trucks set to Regen at 5 Mph with the ISX575.

We may be ordering a bunch of new trucks right away (before they run out of '09 motors) or looking at newer used trucks to update our fleet to stay away from the Urea for a couple more years.

 

EASY on the GD's please 94cummins