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Old April 25th, 2018, 08:04   #1
witchcraftz
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Default Bosch Says It's Made a Breakthrough That Can Save Diesel Engines

“There’s a future for diesel. Today, we want to put a stop, once and for all, to the debate about the demise of diesel technology.” It was with these words that the Bosch CEO Dr. Volkmar Denner, speaking at the company’s annual press conference, announced a decisive breakthrough in diesel technology. A breakthrough in the management of diesel emissions, enabling diesel cars to undercut future limits for nitrogen oxide (NOx) by almost 90 per cent.

Cars must currently emit no more than 168mg/km (milligrams per kilometre) of NOx and, in 2020, that limit will reduce to 120mg/km in real-world driving tests, and 80mg/km in lab assessments. But new technology developed by Bosch allows a diesel VW Golf to emit just 13mg/km of NOx in mixed driving conditions, measured using the latest RDE paradigms.

http://www.ttnews.com/sites/default/...ry-germany.jpg

Announcing the breakthrough at the company’s annual press conference, Bosch’s chief executive, Dr Volkmar Denner, said: “There’s a future for diesel. Today, we want to put a stop, once and for all, to the debate about the demise of diesel technology.” Denner said the company was “pushing the boundaries of what is technically feasible.”

Even in urban driving, where emissions are typically far higher than on the open road, cars equipped with the new technology emit around 40mg/km of NOX - roughly a third of the permitted limits being introduced in 2020. This means, Denner said, that “diesel will remain an option in urban traffic, whether drivers are tradespeople or commuters.”

The technology works by managing exhaust gas recirculation and using a combination of advanced fuel-injection technology, a newly developed air management system, and intelligent temperature management. It is effective as soon as a car is started and works at all engine speeds, allowing it to operate effectively whether the vehicle is driven dynamically or slowly, in freezing conditions or in summer temperatures, on the freeway or in congested city traffic. The system is also effective when drivers accelerate quickly.



Journalists were given the opportunity to drive around Stuttgart in cars equipped with the new system. The results captured from these demonstration drives showed average NOx emissions of under 40mg/km, despite the cars being driven in city centre traffic.

While the system cannot be easily retrofitted to old cars, it is based on already-existing components and is available immediately. It can be incorporated into car makers’ production projects, and the system allows diesel engines to maintain their fuel economy and carbon dioxide (CO2) emissions.



Denner promised more improvements in emissions management would be forthcoming, as Bosch plans to use artificial intelligence to build on its emissions reduction technology. “We firmly believe that the diesel engine will continue to play an important role in the options for future mobility,” he added.

Denner said electric cars had a fundamental role to play in future transport, but “until electromobility breaks through to the mass market, we will still need these highly efficient combustion engines.”

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Old April 25th, 2018, 10:39   #2
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Transcript of the remarks by Dr. Volkmar Denner, chairman of Bosch.

http://www.bosch-presse.de/pressport...gh-156224.html
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Old April 25th, 2018, 12:17   #3
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I sure hope so. I bought a '14 Q5 with 24k miles on it to replace my Jetta 2.0. My hope at the time of buying the Q5 was that by the time it was due for replacement VW/Audi would have diesel figured out. This announcement is a hopeful step in that direction.
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Old April 25th, 2018, 12:17   #4
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Awesome, too bad VAG is evidently too butt hurt to bother with bringing them back HERE.

Of course, you do have to take these statements with a grain of salt, as they sorta said all the same things before, and as it turns out, it was not all what they promised. I'd trust it more if it was tested and verified by a third party for its authenticity.
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Old April 25th, 2018, 12:55   #5
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... I'd trust it more if it was tested and verified by a third party for its authenticity.
Something tells me they're going to have to do that for any credibility.
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Old April 25th, 2018, 14:29   #6
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Here's what I think of Bosch's timing:


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Old April 25th, 2018, 17:07   #7
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I'd be really curious to read about the tech/hardware/chemistry side of it. From reading the Bosch Chairman's remarks, it sounds like it is focused on better controlling the temperature of EGR...so a new EGR cooler design maybe? But anytime I hear anything about EGR, my first thought goes to particulates being recirculated, leading to sludge buildup...which is why (given my rudimentary knowledge) I have always wondered why EGR gasses are generally not picked up downstream of the particulate filter.
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Old April 26th, 2018, 03:00   #8
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The EGR gasses ARE picked up downstream of the DPF...
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Old April 26th, 2018, 04:53   #9
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Here's their technical paper: http://www.bosch-presse.de/pressport..._e_v_final.pdf

Looks like the focus is on getting the emissions control devices warmed up quickly (what people refer to as "blowtorch mode" on the CKRA), and then keeping them warm by minimizing exhaust flow at low load (including start/stop technology).
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Old April 26th, 2018, 07:12   #10
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Would you PLEASE resize the photos?
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Old April 26th, 2018, 07:17   #11
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The EGR gasses ARE picked up downstream of the DPF...
Well you're both right. HP and LP EGR

My thoughts are along the line of some type of liquid cooling somewhere in the exhaust stream.
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Old April 26th, 2018, 07:31   #12
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A little more detail provided on Green Car Congress:

http://www.greencarcongress.com/2018...426-bosch.html
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Old April 26th, 2018, 08:48   #13
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Sounds promising. Too bad they didn't develop this approach 10 years ago rather than looking for ways to game the system- or look the other way while VW did.
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Old April 27th, 2018, 03:18   #14
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Well you're both right. HP and LP EGR

My thoughts are along the line of some type of liquid cooling somewhere in the exhaust stream.

All TDIs sold here since 1997 have had liquid cooled EGR. The newer engines employ some very complex cooling system circuits, dual thermostats, additional pumps, etc., to help both get the engine up to temp quickly as well as keep it there. But exhaust temp is very important too, and to pump coolant through the hot parts of the exhaust (as some hybrid gasoline cars do) would help keep the engine warm, but would be detrimental in their cooling effects on the exhaust components that need to be very hot in order to function properly.
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Old April 27th, 2018, 03:50   #15
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Note that my hybrid's exhaust heat exchanger is post-catalytic converter, for precisely that reason. Recover heat to speed warm-up (helping engine durability, emissions, efficiency, and cabin comfort), but only what the cat doesn't need.

(Also, AFAIK the Gen 4 Prius now takes its EGR after that heat exchanger, meaning it doesn't need a separate EGR cooler, and because it's now post-cat, hopefully the intake clogging problems that the Gen 3 is known for will be reduced or eliminated.)
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