Emission Crackdown Exposes Renault-Nissan Engines

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DaveBerlin
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Post by DaveBerlin »

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DaveBerlin
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Post by DaveBerlin »

The use of SCR Systems & now AdBlue is hitting the Motoring News here being installed on the Trucks from the East Countries. It does appear that the SCR System has been around for some time on Commercial Vehicles and now is being considered by Auto manufacturers it seems. I found a few comments relative to Renault / Nissan and the SCR / AdBlue System if anybody is interested - Dave ;)

Renault expects diesel engines to disappear from most of its European cars, company sources told Reuters, after the French automaker reviewed the costs of meeting tighter emissions standards following the Volkswagen scandal. Diesel engines, pricier but more efficient than gasoline, had already vanished from the smallest 'A'-segment vehicles like Renault's Twingo well before VW's so-called 'dieselgate', as their extra expense outstripped savings on fuel.
By 2020, Renault now predicts that the toughening of Euro 6 emissions rules will push diesel out of cars in the next 'B'-segment size category, including its Clio subcompact, as well as some 'C' models such as the Megane hatchback.
Renault and alliance partner Nissan assume the next wave of emissions rules, Euro 7, could halve NOx output limits again to 40 milligrams per kilometer. Renault is not alone in predicting a bleak future for diesel, though its projections go further than the doubts expressed by other carmakers about the technology.
Renault, however, has been forced to concede that its real-world NOx emissions are far worse than the industry average, and the carmaker remains under investigation by French consumer fraud authorities. That has deepened Renault's engineering headache and tarnished the green image it cultivated with electric car launches and lower-than-average emissions of carbon dioxide (CO2), the dominant focus of regulators prior to dieselgate. In road tests on almost 100 vehicles, ordered by a French commission on diesel emissions, Renault and Nissan cars produced more than eight times the regulatory NOx limit on average, with most of their Euro 6 models closer to 10 times the limit.
In common with Ford, VW and Mercedes, Renault is scrambling to catch up with Peugeot by rolling out costlier Selective Catalytic Reduction (SCR) systems to rein in NOx emissions in real-world driving. But they're going to have to address the diesel issue and add more SCR content than others.

http://fortune.com/2016/09/06/renault-diesel-engines/

SCR System + AdBlue is being used mainly on Commercial Vehicles
Diesel engines can produce higher torque and are 15%-20% more fuel-efficient than gasoline engines. Hence, governments all over the world have been implementing various regulations to check the amount of emissions. SCR is used for controlling the emission levels of Nitrogen oxide from diesel engines. These are fitted in the exhaust system of the vehicles. SCR is a system that converts nitrogen oxides into nitrogen, carbon dioxide, and water. The system uses diesel exhaust fluid (DEF), which is essentially a liquid reductant agent that is injected into the exhaust stream of a diesel engine.

http://www.businesswire.com/news/home/2 ... ion-Market

Selective Catalytic Reduction (SCR) is an advanced active emissions control technology system that injects a liquid-reductant agent through a special catalyst into the exhaust stream of a diesel engine. The reductant source is usually automotive-grade urea, otherwise known as Diesel Exhaust Fluid (DEF). The DEF sets off a chemical reaction that converts nitrogen oxides into nitrogen, water and tiny amounts of carbon dioxide (CO2), natural components of the air we breathe, which is then expelled through the vehicle tailpipe.
SCR technology is designed to permit nitrogen oxide (NOx) reduction reactions to take place in an oxidizing atmosphere. It is called "selective" because it reduces levels of NOx using ammonia as a reductant within a catalyst system. The chemical reaction is known as "reduction" where the DEF is the reducing agent that reacts with NOx to convert the pollutants into nitrogen, water and tiny amounts of CO2. The DEF can be rapidly broken down to produce the oxidizing ammonia in the exhaust stream. SCR technology alone can achieve NOx reductions up to 90 percent.

http://www.dieselforum.org/about-clean- ... hat-is-scr

AdBlue combined with an SCR-catalyst converter has proven to be the leading technology for reducing Nitrogen Oxide (Nox) in exhaust gasses which are created in the combustion process in diesel engines. It all started in the heavy duty truck sector with Euro 4, progressed to Euro 5 and almost all truck manufacturers have embraced AdBlue in Euro 6 emission legislation.

http://www.halfords.com/wcsstore/librar ... ooklet.pdf
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rod9669
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Post by rod9669 »

Adblue = urine
DaveBerlin
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Post by DaveBerlin »

Rod, thanks for that long comment you live and learn here - Dave :D

AdBlue is a high quality urea solution that is easy to use. AdBlue is the registered Trademark for AUS32 (Aqueous Urea Solution 32,5%) that is used with SCR (Selective Catalyfic Reduction) Systems to reduce emissions of oxides of nitrogen from the exhaust of UK diesel vehicles.
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Post by RVW »

So what is the solution for present Nissan diesels?
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DaveBerlin
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Post by DaveBerlin »

RVW, a good question but unfortunately I do not know, try asking the Boys that should know Nissan / Renault. Try your Dealer or NCS just raise the question. We have a 1,2L DIG-T so I will not be chasing anybody for an answer - Dave ;)
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RVW
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Post by RVW »

Have sent the question to NCS Don't hold your breathe though.
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rod9669
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Post by rod9669 »

DaveBerlin wrote:Rod, thanks for that long comment you live and learn here - Dave :D

AdBlue is a high quality urea solution that is easy to use. AdBlue is the registered Trademark for AUS32 (Aqueous Urea Solution 32,5%) that is used with SCR (Selective Catalyfic Reduction) Systems to reduce emissions of oxides of nitrogen from the exhaust of UK diesel vehicles.
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Post by yaesu »

Hi all, what did you all do before knowing your QQ ''possibly'' has an emission issue? It's still the car you chose to purchase so drive and enjoy what is an acceptable vehicle, after all few things in life are perfect!!
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PJB729
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Post by PJB729 »

yaesu wrote:Hi all, what did you all do before knowing your QQ ''possibly'' has an emission issue? It's still the car you chose to purchase so drive and enjoy what is an acceptable vehicle, after all few things in life are perfect!!
Yaesu
I bet there were no faults or problems with the money paid for vechile :D

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