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Old 02-28-2019, 07:28 AM   #1
AVANTI R5
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Default Porsche backflips on first petrol particulate filter






Quote:
The rush to develop petrol particulate filters

Volkswagen, BMW, Ford, Mercedes-Benz and Land Rover line up cleaner petrol-engine technology
Volkswagen announced almost three years ago that it would be employing gasoline/petrol particulate filter (GPF) systems to reduce emissions across its range of petrol-powered vehicles - not just the diesels.

Along with other car makers such as Mercedes-Benz, BMW, Ford and Land Rover, the German conglomerate is aiming to keep petrol viable in the face of increasing pressure from electricity as the industry's dominant power source of the future.

The use of GPF systems comes as a response to ever-tightening emissions restrictions, which address a problem that only came to light in the early 2000s when it was discovered that beneath the already-familiar (10 micron) particulates found in diesel engine exhausts there was a presence of finer particulates (nanoparticles) more than 100 times smaller.

More disturbingly, it was found in a report commissioned by the Swedish National Road Administration that these nanoparticles were produced by some petrol engines too, in certain conditions, in equal numbers to diesel engines.

Capable of penetrating deeper into the lungs when breathed in, these nanoparticles were revealed to be a big, hitherto-unseen health risk inherent in motor vehicle emissions.

The good news is that GPF technology is capable of capturing not just the familiar diesel particulates, but also the nanoparticles found in both diesel and petrol exhausts.

Typically, the particulate filter used in GPF systems is attached close to the turbo where it heats up rapidly so it can perform its functions of dealing with HC, NOx and CO emissions seconds after the engine is fired up. The gases then pass through a conventional catalytic converter, usually located under the vehicle, to finish the clean-up job.

FaureciaNA have been developing a particulate filter for petrol engines
And what about new-fangled diesel tech?

All this cleaner petrol activity comes as various manufacturers announce plans to rid themselves of diesel engines altogether just as they face the prospect of being forced by governments to retrofit emissions-reducing technology in older diesel vehicles.

At the same time, promising new developments are hinting at breakthroughs that have the potential to significantly clean up oil-burners for a lifespan well beyond what is currently being predicted. German auto parts supplier Bosch is working on a revised filter-based system claimed to reduce NOx levels to 13 milligrams per kilometre and academics at two British universities are making progress with ACCT, or Ammonia Creation and Conversion Technology, which is said to drastically reduce NOx emissions.

While there is some scepticism about Bosch's claim that it has found the Holy Grail guaranteeing diesel's future, it nevertheless appears there could be some life yet in fossil-fuel power.



Quote:
Porsche backflips on first petrol particulate filter

And other car-makers including sister brand Volkswagen continue to call for better fuel quality
The controversial petrol particulate filter developed as the next step in European emission controls is not coming to Australia after all.

Porsche, which had reported the first local installation of the system on its updated V6-engined Macan S, now says it is available but has not been ordered for local deliveries.

The backflip comes just two days after the company reported that the filter would be coming.

"The comments made about ongoing research and development on the topic are correct. But, in the end, we made the decision not to bring a petrol particulate filter," Porsche spokesman, Chris Jordan, confirms to www.carsales.com.au

"Both models have the filter in Australia, the two-litre and the V6, but neither has it in Australia."

The Porsche news ends the potential conflict with other brands, including some inside the Volkswagen Group family that covers Skoda to Lamborghini and Bentley in Australia, over the filters.

They are considered unsuitable for Australia's poor-quality unleaded fuel, which has a third-world sulphur content of up to 150 parts-per-million, will kill the filter and potentially damage the engine.

Most companies insist the cut-off to prevent problems is just 10 parts-per-million.

Even so, there are significant differences between the way particulate filters operate in diesel and petrol engines.

"Petrol exhaust temperatures are approximately 200 degrees hotter," says Porsche's technical chief, Paul Watson.

"In a diesel the exhaust temperature is lower. And that's a problem, because we want to regenerate and clean it out, to incinerate the soot.

"In a petrol engine it's much, much easier to generate exhaust gas temperature. And they run much hotter in any case.

Porsche says the upcoming 992-series 911 will not have a filter, although they are fitted in Europe, and avoids any diesel dramas because it has dropped diesels from its model line-up.

One of the reasons for the no-go for Australia is uncertainty over fuels.

"Fuel quality is part of it. And consistency of fuel quality," says Jordan.

"We still don't have the 100 per cent surety . No-one in this part of the world gets it. No-one in our region gets the filter."

Porsche is now re-aligned with Volkswagen, which has been one of the brands that has been agitating for better-quality fuel in Australia.

"As of today we are told that Australian petrol remains an issue for our vehicles," Volkswagen Group spokesman, Paul Pottinger, tells www.carsales.com.au

"Certainly, means are being sought to make petrol particulate filters work with our highly-sulphurous petrol, which is the among the worst in the OECD, but this is by no means guaranteed.

"This would very likely entail a specific solution for this market and the associated costs are precisely what car companies want to avoid passing on to customers. The alternative would be to keep alive engine variants that are being supplanted in
Europe. That is the current scenario and it too comes at a cost."

Volkswagen, like many other members of the Federal Chamber of Automotive Industries including Toyota and Holden, has been lobbying in Canberra to get the fuel standard for Australia improved, despite resistance from the Australian Institute of Petroleum because of the high cost of improving its oil refineries.

"Of course, none of this would be an issue if the AIP did not oppose the introduction of first-world petrol with less than 10 parts per million of sulphur. It wants this held back until 2027," Pottinger says.

"Yet there is nothing to prevent oil companies importing first-world standard petrol and installing it on service station forecourts in place of what currently passes for premium unleaded. Europeans car customers, and numbers in Asian brands, already have to pay the considerable impost charged per litre for premium because basic petrol (91RON and E10) has 150ppm.

"The majority of petrol sold in Australia is imported, so there is no reason why European standard petrol could not be imported at a negligible costs at the bowser. Surely better fuel quality is in everyone's interest."

At Porsche, research into the installation and operation of the filters is continuing but there is nothing approaching a timetable for an arrival in Australia.

"It's a no, until it's a yes," says Jordan.
https://www.carsales.com.au/editoria...filter-117217/
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Last edited by AVANTI R5; 03-03-2019 at 04:57 AM. Reason: Try for the third time..fix photo
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Old 02-28-2019, 01:28 PM   #2
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I just wonder why none seem concerned for all those chimneys and heating systems with zero abatement ? They burn coal, oil, turf or peat and it goes straight up chimney pretty much external combustion. Transportation 14% and that includes ships, trucks and all. Think personal autos 3-5%. But gets 100% attention and blame

Last edited by Masterauto; 03-01-2019 at 10:52 AM.
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Old 02-28-2019, 02:04 PM   #3
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Quote:
Originally Posted by Masterauto View Post
I just wonder why none seem concerned for all those chimneys and heating systems with zero abatement ? They burn coal, oil, turf or peat and it goes straight up chimney pretty much external combustion.
Hell food waste is #1 on that list. Cars are way down the list.
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Old 02-28-2019, 07:49 PM   #4
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Why doesn't anyone care about how many pounds of CO2 each of us gas-bags expels every day!?
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Old 03-01-2019, 03:05 AM   #5
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Quote:
Originally Posted by gathermewool View Post
Why doesn't anyone care about how many pounds of CO2 each of us gas-bags expels every day!?
Well its unavoidable and a small fraction of the amount even a clean gas car does. the average car puts out about as much co2 in 2 miles as a human exhales in a day. Higher octane and lower sulfur fuels decrease emissions and increase mileage and power. Really no downside at all.
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Old 03-01-2019, 07:02 AM   #6
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Quote:
Originally Posted by gathermewool View Post
Why doesn't anyone care about how many pounds of CO2 each of us gas-bags expels every day!?
Quote:
Originally Posted by n2oiroc View Post
Well its unavoidable and a small fraction of the amount even a clean gas car does. the average car puts out about as much co2 in 2 miles as a human exhales in a day. Higher octane and lower sulfur fuels decrease emissions and increase mileage and power. Really no downside at all.
I've got it! we just have to make cars that run on people; it's a win-win.
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Old 03-01-2019, 11:57 AM   #7
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Quote:
Originally Posted by Masterauto View Post
I just wonder why none seem concerned for all those chimneys and heating systems with zero abatement ? They burn coal, oil, turf or peat and it goes straight up chimney pretty much external combustion. Transportation 14% and that includes ships, trucks and all. Think personal autos 3-5%. But gets 100% attention and blame
Because there are more cars than factories/chimneys! The sheer number of them mean they must be badder!!!!



--kC
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Old 03-02-2019, 11:30 AM   #8
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Ships have also been a focus of emissions reduction. Look up shore to ship power systems. Many global ports either have or are in the process of putting in electrical infrastructure for ships to plug in to port power while they wait for unloading and loading to eliminate idling emissions.

Quote:
Originally Posted by Masterauto View Post
I just wonder why none seem concerned for all those chimneys and heating systems with zero abatement ? They burn coal, oil, turf or peat and it goes straight up chimney pretty much external combustion. Transportation 14% and that includes ships, trucks and all. Think personal autos 3-5%. But gets 100% attention and blame
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Old 03-03-2019, 10:46 AM   #9
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People are concerned about chimneys etc. Look at the new EPA rules coming in 2020. You won't be able to buy wood burning stove without a filter or catalyst. We have no burn days here depending on the air quality and risk of the fire being spread.

Climate change comes from reintroducing carbon that long been removed from the Earth's carbon cycle. Digging up oil and burning it. Releasing carbon that is part of that cycle (burning trees, breathing/farting animals) has little effect on the greenhouse effect. Cutting down forests without replacing them does throw the cycle out of balance though.

Last edited by elirentz; 03-03-2019 at 10:52 AM.
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Old 03-03-2019, 12:01 PM   #10
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Yep, I had to get an EPA certified stove to burn most of the winter here.

It cut our wood consumption in half, and has the benefit of not smoking up the fields like our previous one. It does need truly dry wood, and needs to be burned a little differently, but it's very much worth it, and works well if you use it correctly.

I'm never giving it up, except to go to a stove with a catalytic converter
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