Urea injection in 2010

[milo12]

In the press release over at TDR they state 2010 chassis cabs will have urea injection. I wonder if this gives them better mileage than the regular trucks.

[Ram3500Dually]

Its not urea injection
diesel exhaust fluid (DEF) injection based on urea injection Selective Catalyst Reduction (SCR) technology.

Its similar but its not.

The official release

In chassis-cab service, the engine now meets 2010.5 emissions standards in 50 states, thanks to diesel exhaust fluid (DEF) injection based on urea injection Selective Catalyst Reduction (SCR) technology. The standard diesel has a 5 year/100,000 mile warranty, the best in its class. The base alternator increased from 136 to 180 amps.

[Torqasaurus]

Urea injection is a misnomer. Urea is a solid and cannot be injected. The trucks that use urea injection use an aqueous solution of urea, usually 32.5% urea the rest water. DEF (Diesel Exhaust Fluid or Diesel Emissions Fluid) is also a solution of urea and water, usually 32.5% urea known as AUS32. As far as I can tell "DEF injection" is just the new more correct term for "urea injection".

[TONKATOY2]

Originally Posted by Torqasaurus

Urea injection is a misnomer. Urea is a solid and cannot be injected. The trucks that use urea injection use an aqueous solution of urea, usually 32.5% urea the rest water. DEF (Diesel Exhaust Fluid or Diesel Emissions Fluid) is also a solution of urea and water, usually 32.5% urea known as AUS32. As far as I can tell "DEF injection" is just the new more correct term for "urea injection".

OK since they are making a built in tank in 2010 for the new solution ( which will probably be very expensive from dodge) I wonder if you will be able to substitute water-meth in this !!

[milo12]

I think it is injected after the dpf so that wouldn't work.

[farmbo]

so what happens if you let the tank go dry?

[Ram3500Dually]

I would imagine the same thing that happens if you let the fuel tank go dry, the truck stops LOL. Don't quote me on that though

[Torqasaurus]

All the diagrams I have seen have the injection after the DPF, I have only seen one diagram with the injection before the DPF, that was at ... The Go-To Source for Diesel Exhaust Fluid (DEF) Supply, Service & Support!

My question would be; could you fill it with water?

[Supershafts]

You could fill the tank with whatever you wanted...but it injects in the exhaust in front of the scr part of the exhaust which is before the dpf part..

From what i understand there is no detrimental effects of letting the tank run dry, except that the emmissions goes up. That is why they like the urea better then what is being used now since it limits mileage and power, but what they are trying to fix is just that, so you won't want to drive without the tank filled and probably make a detune effect ..
Supposedly for every 1 gallon or maybe it was 1 ounce of urea will treat 100 gallons of fuel used so it's not like your going to have to fill it every other fill up or something.
I had just read a whole article on it and forgot the specifics

[Ram3500Dually]

The tank is supposed to last about the run of an oil change so when you take it in for the oil change they will fill the UREA tank.

[Dale_K]

At first the EPA did not want to authorize SCR as a pollution control technology because of the possibility that owners would let the tank run dry. Therefore the cars have a system that won't let it start with an empty urea tank but first the driver is given a number of warnings before this happens. I presume the trucks have a similar method of operation.

[agalaczy]

Great! Yet one more expensive piece of hardware we have to delete to get the truck to run right.