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BenzDieselTuner
Date registered: Dec 1899
Location:
Vehicle(s):
| Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
Starting late 2006 for MY2007 to meet tough emission standards for passenger cars in North America. The AdBlue aqueous urea solution is supplied by a renewable canister which has to be changed with every oil change at 13,000 miles. This is a simpler version of the SCR used in commercial diesel fleets in Europe and more cost effective than an NOx trap due to a lower fuel consumption of between 2 to 5%. It's reliable since it can't be damaged as easily by sulfur in the diesel fuel as for example an NOx trap, which might not be effective for the mandated 150,000 miles. Ford and Chrysler are also looking at SCR. Nissan is first to introduce it to Japan. In 2005 Mercedes-Benz will deliver the first Actros with SCR, where the SCR catalyst is integrated with the muffler.
3/22/2004
 (SCR_Kat_E.jpg)
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 SCR_Kat_E.jpg (17KB - 15 downloads)
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BenzDieselTuner
Date registered: Dec 1899
Location:
Vehicle(s):
| RE: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
so thats how it works...............  |
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Roch207
Expert
Date registered: Apr 2006
Location: Palmetto State
Vehicle(s): 2005 E320 CDI, 2010 Silverado 2500HD
Posts: 3749
| RE: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
Your not responding to your own post, are you? I just hope the AdBlue system makes the CDI 50 state legal. I am tired of waiting for my new MB Diesel. Now the wife is leaning toward a E320 CDI 4Matic through European Delivery. BDT will have to give me some good places to cruise to. |
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BenzDieselTuner
Date registered: Dec 1899
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| Re: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
30-45 minutes from the factory are the Loewensteiner Mountain range..........go hit those curves.........and the best part is that the autobahn in between there is long up and downs, with full speed ahead allowed! |
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ABenzGuy
Regular
Date registered: May 2006
Location: Chesapeake, VA, USA
Vehicle(s): '06 ML350; '97 C280
Posts: 76
| RE: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
I am very seriously considering the ML320 CDI when we get it here this Fall even though I love my current ML. I'd just like something more fuel efficient! I'm just hoping all this new technology doesn't kill the diesel's reliability and longevity; e.g., a lot of new parts added on that can break. Also the Star article I read on this didn't mention if the new engine will run on biodiesel. I guess if you're running a much cleaner fuel; e.g., biodiesel, then all the BlueTec "stuff" wouldn't be necessary? |
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Wolfgang
Date registered: Dec 1899
Location:
Vehicle(s):
| RE: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
ABenzGuy - 8/5/2006 6:23 AM
I am very seriously considering the ML320 CDI when we get it here this Fall even though I love my current ML. I'd just like something more fuel efficient! I'm just hoping all this new technology doesn't kill the diesel's reliability and longevity; e.g., a lot of new parts added on that can break. Also the Star article I read on this didn't mention if the new engine will run on biodiesel. I guess if you're running a much cleaner fuel; e.g., biodiesel, then all the BlueTec "stuff" wouldn't be necessary?
It looks like the ML320 CDI will be able to use B5. 
The JGC CRD uses the same engine and will come with a B5 factory fill.  |
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BenzDieselTuner
Date registered: Dec 1899
Location:
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| Re: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
sweet |
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ForcedInduction
Regular
Date registered: Sep 2006
Location: Federal Heights, CO
Vehicle(s): 1980 240D 3.0VNT
Posts: 89
| RE: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
I wonder how they will be kept working once the urea is low. Running out of fuel is one thing, urea is completely different... Just an idea: "Fix" the urea level sensor to show full all the time?
Wire a resistor in the harness or stick the float at the top?
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BenzDieselTuner
Date registered: Dec 1899
Location:
Vehicle(s):
| Re: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
with all the computerized crap turned on, WILL SHE EVEN RUN without Urea? thats the BIG question.......like what if u make a road trip to far away, and cant find a re-fill? |
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Roch207
Expert
Date registered: Apr 2006
Location: Palmetto State
Vehicle(s): 2005 E320 CDI, 2010 Silverado 2500HD
Posts: 3749
| Re: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
Sounds like it only gets refilled at service intervals, which would be at the 5,000 mile mark. I would assume they calculate a safety margin like a fuel tank, but still it is a good question. What if the dealer charges you for adblue but does not put it in! I guess it would be like a muffler shop puttiing on an exhaust system without a catalytic converter. The car would work, it just would not pass the emission inspection. |
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ForcedInduction
Regular
Date registered: Sep 2006
Location: Federal Heights, CO
Vehicle(s): 1980 240D 3.0VNT
Posts: 89
| RE: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
The EPA is pressuring them to have the car disable itself in some way if the AdBlue tank should run empty. That's why I was thinking if one could fool the level sensor to make it think it's always full. But, there is a sensor after the SCRcat and I don't know what kind of readings it's designed to look for.
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Roch207
Expert
Date registered: Apr 2006
Location: Palmetto State
Vehicle(s): 2005 E320 CDI, 2010 Silverado 2500HD
Posts: 3749
| RE: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
Are they going to make it so complicated we can't refill it ourselves? It sounds like they will be using a cartridge system. I can only imagine the DIY savings...
Dealer - $70 service to install AdBlue
DIY - $12.00 cartridge plus your time
There will probably be some special wrench you need to remove a cover.  |
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BenzDieselTuner
Date registered: Dec 1899
Location:
Vehicle(s):
| Re: Mercedes BlueTec® to use Selective Catalytic Reduction (SCR)
i imagine that without the Adblue running through the system, that the Kat will get fried somehow, and require expensive replacment....... |
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