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Emission Control


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TheWolf
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Emission Control - Postby TheWolf » 10 Nov 2012, 19:29


http://www.cumminsdieselspecs.com/67_emissions.html

6.7L Cummins Emission Equipment

Meeting New Emissions Regulations
The new 6.7 liter Cummins meets stricter diesel emissions requirements established by the EPA for 2007. The complex system that controls diesel emissions makes the 6.7 the cleaniest Cummins diesel yet. The system is divided into three main parts; the diesel particulate filter (DPF), the exhaust gas recirculation system (EGR), and the exhaust aftertreatment system (active regeneration).

Diesel Particulate Filter:
The 6.7 liter Cummins is equipped with a diesel particulate filter, or DPF. Exhaust gases reach the DPF prior to flowing into the muffler. Diesel particulate filters drastically decrease the amount of diesel particulates (soot) and unburned hydrocarbons released from the combustion of diesel fuel. The honeycomb structure of the DPF captures soot as it passes through the filter. The Cummins diesel particulate filter reduces diesel particulate matter emissions by approximately 90 percent. The problem associated with DPF's is that over time, soot collecting in the DPF can clog it, resulting in decreased performance and fuel efficiency.

Exhaust Aftertreatment:
The answer to DPF clogging issues is an exhaust aftertreatment known as active regeneration. Sensors tell the engine when excessive particulate matter has built up in the DPF, and active regeneration mode is triggered. During active regeneration, the engine idle is increased to help heat the DPF, and diesel fuel is injected during the exhaust stroke, allowing fuel to enter the exhaust system and burn in the DPF. The combusition of diesel fuel in the DPF generates the heat necessary to burn off soot within the filter, essentially cleaning it. During active regeneration, the DPF can exceed temperatures of 1,000 degrees F. The main downfall of active regeneration mode is that it dramatically decreases fuel economy. Also, occasional maintenance is required to remove excess ash from the DPF that is left behind by exhaust aftertreatment.

Exhaust Gas Recirculation:
Exhaust gas recirculation, also known as EGR, is a technology that is not specifc to the diesel industry. EGR systems have been used for years in both diesel and gasoline powered vehicles because they help to lower greenhouse gas emissions. In a diesel, the primary function of the EGR system is to lower the amount of Nitrous Oxides (NOx) produced by the combustion of diesel fuel. A portion of the engines exhaust gas is recirculated into the engine and combusted again. This lowers the amount of excess oxygen and lowers peak combustion temperatures. Since NOx formation occurs much faster at high temperatures, the EGR limits the generation of NOx. NOx is primarily formed when a mixture of nitrogen and oxygen is subjected to high temperatures. Despite the reduction of NOx, Exhaust gas recirculation systems have negative effects on performance and fuel economy, and other exhaust treatments are necessary because EGR systems increase the amount of diesel particulate matter produced by the engine.

EGR and DPT can be removed, but it is legal to do so. This is not just on pickup trucks. DPF and EGR are on all new diesel motors, EGR is on most gas motors. All these wreck the motors. Environment Canada has synced Canada's emission laws with the U.S. How is this preventing pollution and helping the environment if:
1.More parts are needed
2.More fuel is being used
3.The motor doesn't last as long
4.The oil must be changed more often


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Re: Emission Control - Postby [FGS]Kalman » 10 Nov 2012, 20:07


Not sure if spambot, or just shared an article


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Re: Emission Control - Postby Mastakilla » 10 Nov 2012, 23:13


Image


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ShadowRunner
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Re: Emission Control - Postby ShadowRunner » 11 Nov 2012, 12:07


Sev,

why are you masquerading as a spambot? We can see it's you, is this a stealth application?


anax
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Re: Emission Control - Postby anax » 11 Nov 2012, 13:47


Mastakilla wrote:Image

THIS


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Re: Emission Control - Postby ~][FGS][Nobody~ » 11 Nov 2012, 14:46


meh.. TLDR


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Re: Emission Control - Postby anax » 12 Nov 2012, 11:48


wtf is a TLDR


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Re: Emission Control - Postby IchoTolot » 12 Nov 2012, 11:54


TheWolf wrote:... Environment Canada has synced Canada's emission laws with the U.S. How is this preventing pollution and helping the environment ...


North American Pact

http://archive.newsmax.com/archives/art ... 0913.shtml

btw

@anax ... tldr = too long; didn't read


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Re: Emission Control - Postby ShadowRunner » 12 Nov 2012, 17:34


This is all Dan's fault, smoke emissions.


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Re: Emission Control - Postby Whiplash » 17 Nov 2012, 21:15


Yeah, we have the same thing in Europe. Strict emissions control on new cars, means we now have DPF (Diesel Particulate Filters) on diesel cars made after the mid 2000s. They're causing mechanical trouble right left and centre. Fortunately my diesel car is a '99 so it doesn't have a DPF system :clout: \:D/


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Re: Emission Control - Postby TheWolf » 04 Feb 2013, 07:11


There's always the idea of pulling it off and chipping it so the computer doesn't send the truck into limp mode.... The no dpf and egr Ram trucks last year was 2007.5, 5.9L cummins... Ford's last year was 2003 with the 7.3L Powerstroke... I don't know when GM's was... They're putting that crap on farm equipment and highway tractors. As if the semis don't get crap fuel milage already! 7mpg or less haha.


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