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Search: Keyword(s): ; Posts Made By: wxmanCCM
Forum: BMW Diesel Owners / Enthusiasts 06-11-2016, 10:08 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
Why does there appear to be no concern in Europe...

Why does there appear to be no concern in Europe of the 65% of petrol cars tested by one organization exceeding the regulatory limits for carbon monoxide (CO)?


http://tinyurl.com/jf4osrw


CO...
Forum: BMW Diesel Owners / Enthusiasts 05-27-2016, 04:35 PM
Replies: 16
Views: 625
Posted By wxmanCCM
From the linked article in the OP... ...

From the linked article in the OP...





Apparently these researchers aren't aware that all life on earth (terrestrial life anyway) would eventually disappear if not for airborne particulates?...
Forum: BMW Diesel Owners / Enthusiasts 04-25-2016, 08:38 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
Yes, the U.S.-spec BMW diesels have both LNT and...

Yes, the U.S.-spec BMW diesels have both LNT and SCR for NOx control. It's the most effective NOx control currently available, but is also more costly.
Forum: BMW Diesel Owners / Enthusiasts 03-11-2016, 10:03 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
There actually are damage costs associated with...

There actually are damage costs associated with CO2 emissions, but there appears to be no generally agreed-upon costs. The same document I cited above contains a range of damage costs in Table 7.1-2....
Forum: BMW Diesel Owners / Enthusiasts 02-21-2016, 10:26 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
Just to put things into perspective, I estimated...

Just to put things into perspective, I estimated full life-cycle emissions and corresponding damage costs to public health and the environment of gasoline and diesel versions of the VW Golf, using...
Forum: BMW Diesel Owners / Enthusiasts 02-21-2016, 09:29 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
I agree that NOx emission control from LD diesel...

I agree that NOx emission control from LD diesel vehicles is still an issue, and that SCR is still an immature emission control technology. It may be difficult for diesel passenger cars to compete...
Forum: BMW Diesel Owners / Enthusiasts 02-19-2016, 04:34 PM
Replies: 817
Views: 47,204
Posted By wxmanCCM
It appears the lawsuit is based exclusively on...

It appears the lawsuit is based exclusively on the Dutch study from May 2015 (https://www.hbsslaw.com/uploads/case_downloads/mercedes/2.18_mercedes_complaint.pdf). Thus there is an assumption that...
Forum: BMW Diesel Owners / Enthusiasts 01-22-2016, 04:35 PM
Replies: 817
Views: 47,204
Posted By wxmanCCM
You're welcome, PL. In related news,...

You're welcome, PL.

In related news, light-duty gasoline vehicles (LDGV) still are the main source of ambient VOCs in SoCAB.


http://www.sciencedirect.com/science/article/pii/S1352231015304350
Forum: BMW Diesel Owners / Enthusiasts 01-22-2016, 09:32 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
I don't see how the approach CARB has taken can...

I don't see how the approach CARB has taken can be explained other than from political influence.

It's been known for decades that California's South Coast Air Basin (SoCAB) typically had higher...
Forum: BMW Diesel Owners / Enthusiasts 01-18-2016, 11:29 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
One other point, according to that same APEEP...

One other point, according to that same APEEP model, marginal damages from NH3 (ammonia) are generally much higher than NOx (up to $302,000/ton for NH3 compared to up to $5300/ton from NOx - worst...
Forum: BMW Diesel Owners / Enthusiasts 01-18-2016, 11:29 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
This is something that I've hesitated to post,...

This is something that I've hesitated to post, because I don't know if I believe it myself, but according to an industry-standard "marginal damage" assessment model ("APEEP" -...
Forum: BMW Diesel Owners / Enthusiasts 01-04-2016, 07:49 AM
Replies: 16
Views: 903
Posted By wxmanCCM
In real-world rather than specified tests, GDI...

In real-world rather than specified tests, GDI petrol vehicles have been shown to produce up to 8000 times more particle emissions than DPF diesels at start up (http://papers.sae.org/2015-01-1077/)....
Forum: BMW Diesel Owners / Enthusiasts 01-02-2016, 12:21 PM
Replies: 16
Views: 903
Posted By wxmanCCM
You're welcome, PL. I agree with most of what you...

You're welcome, PL. I agree with most of what you post regarding diesel emissions.

One more point I wanted to make. I belong to the American Meteorological Society and receive the Bulletin of the...
Forum: BMW Diesel Owners / Enthusiasts 01-02-2016, 11:13 AM
Replies: 16
Views: 903
Posted By wxmanCCM
Then UK is dismissing European studies which show...

Then UK is dismissing European studies which show that petrol has much higher particulate emissions than filtered diesels...




Athanasios Mamakos; Urbano Manfredi, "Physical Characterization...
Forum: BMW Diesel Owners / Enthusiasts 12-23-2015, 08:26 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
It should be noted that EPA explicitly stated...

It should be noted that EPA explicitly stated that it performed additional testing on the 2016 X5 35d in the certification process to verify the certified emission results and that it had no "defeat...
Forum: BMW Diesel Owners / Enthusiasts 12-11-2015, 12:17 PM
Replies: 817
Views: 47,204
Posted By wxmanCCM
U.S. approves 2016 BMW diesel X5 for sale after EPA review

http://www.autonews.com/article/20151210/OEM04/151219979/u.s.-approves-2016-bmw-diesel-x5-for-sale-after-epa-review
Forum: BMW Diesel Owners / Enthusiasts 11-04-2015, 12:43 PM
Replies: 51
Views: 4,532
Posted By wxmanCCM
Based on the latest version of Argonne National...

Based on the latest version of Argonne National Laboratory's GREET model (GREET_2015), and the current U.S. electric generation mix (January - July 2015) per EIA, the following is a graphical...
Forum: BMW Diesel Owners / Enthusiasts 10-09-2015, 10:42 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
I saw that too, but I haven't seen exactly how...

I saw that too, but I haven't seen exactly how that figure was derived.

Again, the extra NOx emissions from the non-compliant TDI vehicles are offset about every 4 days by replacing 1990s-era...
Forum: BMW Diesel Owners / Enthusiasts 10-08-2015, 12:38 PM
Replies: 817
Views: 47,204
Posted By wxmanCCM
All areas of the U.S. are well below the National...

All areas of the U.S. are well below the National Ambient Air Quality Standard (NAAQS) for NO2 (NOx = NO + NO2) based on EPA monitoring data.
...
Forum: BMW Diesel Owners / Enthusiasts 10-04-2015, 11:18 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
I completely agree. It's a regulatory compliance...

I completely agree. It's a regulatory compliance issue (fraud actually), but not really an environmental issue.
Forum: BMW Diesel Owners / Enthusiasts 10-04-2015, 09:59 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
Here is another point to put this in perspective....

Here is another point to put this in perspective. Even assuming the average NOx emission rate of the non-compliant tdi cars is 1 gram/mile above the regulated limit, the extra NOx would be offset by...
Forum: BMW Diesel Owners / Enthusiasts 10-04-2015, 09:59 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
Here is another point to put this in perspective....

Here is another point to put this in perspective. Even assuming the average NOx emission rate of the non-compliant tdi cars is 1 gram/mile above the regulated limit, the extra NOx would be offset by...
Forum: BMW Diesel Owners / Enthusiasts 09-25-2015, 08:26 AM
Replies: 817
Views: 47,204
Posted By wxmanCCM
Just for a little perspective - the additional...

Just for a little perspective - the additional NOx emitted by the 482,000 non-compliant VWs (based on the "multi-state" test in the ICCT report) would amount to the same as an additional 90,000...
Forum: BMW Diesel Owners / Enthusiasts 09-18-2015, 12:31 PM
Replies: 817
Views: 47,204
Posted By wxmanCCM
Apparently not. The study that alerted EPA to...

Apparently not. The study that alerted EPA to the higher actual emissions of NOx was the ICCT/WVU study in which a BMW X5 35d was the only diesel vehicle that actually met the regulatory limits for...
Forum: BMW Diesel Owners / Enthusiasts 09-17-2015, 02:00 PM
Replies: 18
Views: 1,255
Posted By wxmanCCM
Another perplexing issue with the "Diesel...

Another perplexing issue with the "Diesel vehicles are the single biggest contributor to these high levels of NO2" mantra is that even if the "Diesel cars break nitrogen oxide emission limits"...
Showing results 1 to 25 of 185

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