New Diesel Emissions
10-20-2009, 02:43 PM
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2005 E320 CDI, 2003 SL 500 sold, 2008 CL63
New Diesel Emissions
I was curious if the new Mercedes diesels(2007+) with the required particulate filters go through regeneration events (to burn the soot) like the new heavy duty pickup diesels do here in the USA? If so, do any you owners notice any performance difference or fuel economy loss during the regeneration event?
10-20-2009, 06:59 PM
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1982 300D VNT, 1980 240D 3.0T, 1982 300TD
Yes, they automatically perform active regeneration when DPF restriction is high.
Fuel economy suffers significantly because of this. The V6 3.0L engine gets similar fuel economy to the previous generation inline-6 3.2L engine due to the 7-speed transmission, smaller engine displacement and piezo injectors.
Fuel economy suffers significantly because of this. The V6 3.0L engine gets similar fuel economy to the previous generation inline-6 3.2L engine due to the 7-speed transmission, smaller engine displacement and piezo injectors.
10-20-2009, 09:12 PM
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2005 E320 CDI, 2003 SL 500 sold, 2008 CL63
Interesting. Do you know if they inject fuel late in the exhaust cycle so it burns downstream or do they have a seperate injector right at the particulate filter?
10-20-2009, 10:17 PM
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2005 E320 CDI, 2003 SL 500 sold, 2008 CL63
That tells me if I had one of those I would change the oil more often. Oil dilution with fuel seems to be the result from what I read using that strategy. Are the particulate filters a US deal only or does Europe have the same technology?
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10-23-2009, 09:05 AM
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1983 300d turbo
so less moving mass = shorter event cycles. also these would be acuated electricly and not by the cam? electric or mechanical fuel pump? sorry the questions are so basic but this diesel stuff is completely new to me.
10-23-2009, 05:21 PM
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1982 300D VNT, 1980 240D 3.0T, 1982 300TD
Yes, Piezo crystals respond far faster than metal solenoids. They are controlled directly by the engine computer.
The fuel system has a low pressure electric lift pump and an engine driven Bosch CP3 high pressure pump to make the 29,000psi pressure that feeds the injectors.
Yes, 29,000psi is the correct number.
The fuel system has a low pressure electric lift pump and an engine driven Bosch CP3 high pressure pump to make the 29,000psi pressure that feeds the injectors.
Yes, 29,000psi is the correct number.
10-26-2009, 10:14 PM
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10-27-2009, 09:04 AM
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190D 2.5 (x2), 190E 2.6, W202 C240,W202 C43 (C55), W210 E55, W212 E250CDI
I was curious if the new Mercedes diesels(2007+) with the required particulate filters go through regeneration events (to burn the soot) like the new heavy duty pickup diesels do here in the USA? If so, do any you owners notice any performance difference or fuel economy loss during the regeneration event?
10-28-2009, 08:49 AM
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things with and without wheels
Twin turbo, clean gas recirculation using an ARD head. The turbocharger has its own ECU and its a double axle variable nozzle. Believe me nothing simple about it.
The end result no soot at all out the tailpipe and at the same time less power at the crank, go figure
and this is a medium duty engine
The end result no soot at all out the tailpipe and at the same time less power at the crank, go figure
and this is a medium duty engine
10-28-2009, 03:43 PM
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1982 300D VNT, 1980 240D 3.0T, 1982 300TD
Compound turbos: Been done on diesels for decades.
"Clean gas recirculation", translation: EGR that gets its exhaust after the DPF (MB did that in 1985) and uses an intake throttle to force engine ingestion.
Aftertreatment Regeneration Device (ARD): Flame thrower. Pointless and completely wasteful piece of garbage that exists only to "clean" the DPF.
Nothing new or special.
The end result no soot at all out the tailpipe
Last edited by 240D 3.0T; 10-28-2009 at 03:47 PM.
11-17-2009, 10:28 PM
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08 S65, 06 M3 CS(stick), 02 BMW X5 4.6iS, 07 R1 Raven, 08 F-450 4x4, 08 CooperS JCW
No it isn't. One is a fixed turbine and the other is wastegated, both conventional turbos.
Compound turbos: Been done on diesels for decades.
"Clean gas recirculation", translation: EGR that gets its exhaust after the DPF (MB did that in 1985) and uses an intake throttle to force engine ingestion.
Aftertreatment Regeneration Device (ARD): Flame thrower. Pointless and completely wasteful piece of garbage that exists only to "clean" the DPF.
Nothing new or special.
The DPF alone is responsible for that. The engine still smokes, you just can't see it anymore.
Compound turbos: Been done on diesels for decades.
"Clean gas recirculation", translation: EGR that gets its exhaust after the DPF (MB did that in 1985) and uses an intake throttle to force engine ingestion.
Aftertreatment Regeneration Device (ARD): Flame thrower. Pointless and completely wasteful piece of garbage that exists only to "clean" the DPF.
Nothing new or special.
The DPF alone is responsible for that. The engine still smokes, you just can't see it anymore.
