tdiclub中關於EPA控訴VW的理性討論

Originally Posted by hikertdi
I don’t often post but after reading many portions of this thread and the report that started the investigation I want to share some of my thoughts.

First, the report itself cites the standard is an average for a given manufacturer’s fleet on page 5. The NOx standard is not meet by a given model or individual car. Some models can be over the limit, but others would need to be under the limit. But for a given model, it should be expected to have varied emissions in different conditions/demands.

Looking at the multi-state real world driving data for the Passat, there are a number of reported measurements where the car is well below the limit when driven on the flat hiway. The car is clearly capable under the right ON ROAD conditions of being cleaner than the standard helping lower its overall average. Also, for this pages 78-79, the report shows the total average multistate NOx to be .25 g/km which is 5x standard, not the eye popping “upto 40x” where the media uses the worst case urban route of the LNT car. This data proves that the emissions controls are indeed working on road, not what the media would have us believe that there are no controls at all on road.

The BMW exceeded standard by 10x for the up/downhill route, yet we don’t hear any issues with BMW performing a violation. Yes the BMW did fare better overall in the other conditions, but it would seem that BMW engineers also allow the “controls” to come off significantly at times.

2nd – The NOx is not the only pollutant measured in the report to be controlled by the EPA, there is also data for the Carbon Monoxide (CO), Total Hydrocarbons (THC) and Particulate Matter (PM). We don’t hear about those due to how AWESOME the car performs for these emissions. Page 80 shows the CO to be 1% of the allowed standard. Page 81 shows the THC to be under 1% of the allowed standard. Page 83 shows the PM to be a whopping 0.1% of the allowed standard. No media report has ever told us how clean these engines are for the other pollutants, nor do they show how clean they are compared to gasoline equivalents for these pollutants.

3rd - The report has other issues such as being dominated by urban routes. The LNT car’s hiway data is corrupted by “rush hour”. Isn’t than urban? (page 12) Only 60% of the hiway route was over 90km/hr. Maybe that is hiway in CA, but not for me. The averages do not appear weighted by miles which will greatly skew the poor urban #s with lower distances over the better NOx performing miles with significantly more distance. The report shows the routes being as much as 3x length different, and the portions of the multistate I don’t believe are listed at all.

I don’t make light of the fact VW has done something extremely improper to make NOx test better than it is on road. But there is more to the story than “VW Cheated” and the “40x over standard” emissions. Despite any wrongdoing these are still incredibly clean cars overall, and the NOx performance is not nearly as bad as what is being reported.

I’ll continue to drive my 180K mile ’00 ALH (aka smoky) with pride. And my better half’s 82K ’09 CBEA will continue to display CLNDZL on its plates. For now, the EPA has forced me to continue to drive my ’00 ALH as long as I can rather than replacing it with what would CLEARLY be a lower emission vehicle in the form of a ’16 TDI.

懶得翻譯，簡單講，BMW也在某些狀況下超標。
VW超標被誇張的那台用的技術是老舊的，也只有在偏離測試規範很大的狀況下才產生這樣的差異，事實上帶來的是燃燒效率更高，更省油更有力(因為NOx是這些優點的副產物)，VW沒付錢給我，所以我不會太認真回應什麼，有興趣的就自己看看想想。

確認後的補充:

把作弊軟體拿掉，VW一樣完全符合規範，至少跟BMW一樣符合。