Bluetec vs Urea injection

[JLDickmon]

bluetec = PEE!

acturally, Bluetec is cooled & throttled EGR fed into a throttled intake

pee is Urea Injection... which Jeep & Benz might use... Volvo already said "No"

I can't see anyone adopting pee, you have to rely on the driver/operator to refill the tank at regular intervals, which isn't gonna happen, "..hey, it still runs..." you can't even get guys to buy a $1.35 gallon of washer solvent during an oil change, I tell someone their car needs $35 of peewater or it won't meet Emissions, and what do ya think is gonna happen?

 

[02SilverStroke]

I believe I'd rather have Bluetec.

 

[dpantazis]

jld-
my bad.

E class is DeNOx, GL class is AdBlue.

The DeNOx system includes a DPF and oxidizing catalytic converter.

The AdBlue is the urea system. the DeNox is the catalytic system.

The VW and Volvo clean diesel are the DeNOx type system.

Mercedes-Benz USA | Browser Upgrade Required


BLUETEC - A New Blueprint for the World's Cleanest Diesels

Mercedes-Benz diesels have an innovative, high-tech powertrain that's highly efficient and powerful. They offer four-cylinder fuel economy with V8 torque.

To ensure what exits the engine is already as clean as possible, BLUETEC is built on a foundation of advanced engine design that includes four valves per cylinder, centrally located piezo-electric injectors, third-generation CDI direct injection, a turbocharger with variable nozzle turbine and exhaust gas recirculation. Central to the E320 BLUETEC is a new 3.0-liter V6 turbodiesel engine producing 210 horsepower and 388 lb.-ft. of torque, which replaces the in-line six found in the previous E320 CDI.

The BLUETEC system depends on the use of ultra low-sulfur diesel fuel (less than 15 parts per million) that becomes available throughout the U.S. this fall. Sulfur is a natural element in most mineral oils. It has a corrosive effect on engines and is a major cause of particulate emissions. The availability of extremely low-sulfur fuel enables the use of reliable particulate filters and efficient nitrogen oxide after-treatment.

The E320 BLUETEC incorporates four after-treatment units in the exhaust stream - an oxidizing catalytic converter, a particulate filter, an advanced "denox" storage converter, and a SCR catalytic converter.

A BLUETEC Module for the Future - AdBlue

To meet even more stringent emission requirements the a BLUETEC system could be equipped with another module - AdBlue injection. A water-based urea solution, AdBlue is carried in its own small tank and metered into the exhaust in minute quantities, so small that the tank only needs to be refilled during routine scheduled maintenance. When AdBlue is injected into pre-cleaned exhaust gas, ammonia (NH3) is released, converting nitrogen oxides into harmless nitrogen (and water) in the downstream SCR catalytic converter. Called SCR, for selective catalytic reduction, this process creates the most effective method of exhaust gas after-treatment currently available.

In Europe, AdBlue injection has already proven effective in more than 15,000 Mercedes-Benz commercial vehicles, and the AdBlue supply network covers some 1,500 locations.

 

[Zookie400]

urea injection is more costly, and as jl said, nobody fills the bottles. we have installed several experimental urea systems on trucks for companies developing them.....all are junk and came off after 6 months-1year. not that bluetec is much better!

 

[bushpilot]

urea injection is more costly, and as jl said, nobody fills the bottles. we have installed several experimental urea systems on trucks for companies developing them.....all are junk and came off after 6 months-1year. not that bluetec is much better!

so you retro-fitted a urea system on to existing trucks ? wasnt
aware there was a system to do that w/.

its my understanding the <at least w/ the MB trucks> the chemical
tank is pretty large and that it doesnt need refilling very often.

 

[Zookie400]

the systems we retro fitted were aftermarket (i forget the name of the company), and the bottle was 1.5 gallons. needed to be refilled about once a month, highway trucks about every 2 weeks. it was a software nightmare, the company had tried to make thier computer talk to the caterpillar ecm, and it was just terrible. all sorts of wild things started to happen due to false communications....urea pumping full bore at idle, idle trying to go down to 200rpms, egts through the roof while driving 40mph......bad bad systems this company made. needless to say that was about 2 years ago and the systems got yanked off the test trucks and we never heard from them again.