Urea is a highly effective way to reduce NOx emissions; it's an alternative to EGR and retarded timing, although the upcoming NOx emissions are severe enough to a point that EGR isn't going anywhere. DPF's have no

Urea has been used in Europe for several years.

It's not bad because it has little effect on the engine and is pretty simple. It's downside is that it's a consumable.

I've never heard of a low-urea being a shut-down either. Might be a de-rate. I'll need to get back to you on that.

 

hell if ya run out on the side of the road just **** in the tank and you will be on your way

 

One advantage it has over the DPF system is greatly reduced exhaust temperatures during re-gen cycles. New trucks with DPF's you can't take in the fields for fear of lighting everything on fire, the exhaust piping gets so incredibly hot.

 

the problem is that the dpf is gonna still be there, the urea is gonna be injected after the dpf to kill any other nox that the dpf doesnt get...its all a load of bullshit, i wonder if my company will buy there own urea fuel station...and also i dont think the engine will shut down if it runs out that would be a safety liabilty

 

Yeah it can't shut down. In semis with the current DPF, it scales back to 1100rpm while it regens, but I'm hoping the whole point of the urea injection is that it won't have to scale back on power at all and just has an 'invisible' regen cycle if at all so that it has no impact on the driver or performance.

 

i dont think they derate while in re gen, ive driven the Cummins ISX's around the yard (its a big yard) here at work and they have shown regen but would still run ***** out

 

I would think glider kits will make a comeback. Who would not want a new truck with the older better running motor. Just like a 09 Dodge with a 12 valve

Cliff

 

Begel1 couldn't have said it better, the practicality of urea really isn't there, but it isnt a bad thing. the trucks will get some mileage back when they bump the timing back up and lay off the EGR abit, like he said it isn't going anywhere but i'm sure they aren't going to utilize it to the max. of course they're going to keep the dpf, but instead of fuel they're spraying the urea i believe or is it the urea along with the fuel?. so, extreme temps aren't as much of a problem. i've actually heard of the bunks melting down durring regen.

 

you would think but now days glider kits come with dpf's on them allready and all wireing is for that year only.we tried to order 25 glider kits at dealership i work for rigt when dpf started and were told that whole cab harness and dpf comes with it and you could only use that year motor in it.i am sure one could buy glider kit and rip out every single wire out and all fuse panels and start from scratch but it would be waste of money

 

I don't think the trucks are going to get any milage back by bumping up the timeing. I guess milage would go up but then you would use so much urea your not gaining anything.

The only thing Urea does is treat Nox gases that is it has nothing to do with the DPF.

I have yet to see or hear of the price of the liquid urea.

I wonder what would happen if you have a bad injector and get fuel in your exhaust. You know like the flame throwing ford video and at the same time Urea gets added to the mix