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Cummins pickup truck engines tricked air quality controls, feds say

usatoday.com

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Re: Cummins pickup truck engines tricked air quality controls, feds say

#25
post #12

Earlier quoted context omitted.

I know this is a popular take, but the blindspot is commercial engines. > bypass emissions sensors on 630,000 RAM pickup truck engines In this case, and in nearly _every report of a scandal_, the issue is with passenger vehicle engines, not commercial vehicle engines. Diesel engines can be engineered to meet emissions requirements without cheating, they just aren't except for commercial use.

Why is that? Are the parts necessary to meet emissions requirements extra expensive and so are only worth installing on commercial vehicles which are more expensive, vs passenger vehicles have a different profit margin, or is it something else, like commerical vehicles have lower standards for noise or higher standards for maintenance?

Commercial diesel engines run for millions of miles / tens of thousands of hours versus passenger or non commercial is measured in hundreds of thousands of miles typically and thousands of hours. Commercials idle for far longer especially in dense areas like cities, rest stops, distribution centers and ports. Maintaining a fleet of diesels can be written off as a business expense (OPEX) while most non commercial use can’t or isn’t. Would be my guess.

Re: Cummins pickup truck engines tricked air quality controls, feds say

#26

VW did it Renault probably did it These guys probably did I think there was a point where regulators said "diesel puts out lung damaging levels of pollutants killing X people a year. We shall either ban diesel engines ... or make manufacturers make diesel engines that don't pollute that badly" So they set a safe level. And no manufacturer has been able to achieve the technology to meet that level. I know some manufac…

Is this a side effect of impossible regulations put in place by bureaucrats with no technical background whatsoever?

The same ones that declared everyone will be driving EVs by 2030.

Re: Cummins pickup truck engines tricked air quality controls, feds say

#27

VW did it Renault probably did it These guys probably did I think there was a point where regulators said "diesel puts out lung damaging levels of pollutants killing X people a year. We shall either ban diesel engines ... or make manufacturers make diesel engines that don't pollute that badly" So they set a safe level. And no manufacturer has been able to achieve the technology to meet that level. I know some manufac…

One more reason it's time to transition away from burning stuff to produce energy.

Transition to what, exactly? Pixie dust? Unicorn farts? There's nothing to transition to.

Re: Cummins pickup truck engines tricked air quality controls, feds say

#28
post #3

This isn't even the first time Cummins has been hit with the largest settlement for emissions controls defeat devices![0] [0] https://web.archive.org/web/20151002043823/http://www2.epa.g...

Wow, and then had the audacity to continue the practice beyond that? That fine should be significantly more severe…

It's America, you get a bonus for this behavior, not a fine.

Re: Cummins pickup truck engines tricked air quality controls, feds say

#29
post #5

Is there any detailed information anyone can find on what they allegedly did, at a technical level? "Defeat device" is such a broad category of term that it's useless for understanding the details of what it's claimed they did. The Justice.gov writeup [0] isn't any better. > The company allegedly installed defeat devices on 630,000 model year 2013 to 2019 RAM 2500 and 3500 pickup truck engines. The company also alleg…

I'm guessing they're doing it during state emissions certification. When they do those tests they hook up to your OBD2 port [1] and generally a tube goes onto your exhaust. It'd be pretty trivial to detect, "Cable is hooked up, exhaust has more back pressure. Tune engine to X mode."

1: https://www.progressive.com/answers/what-is-car-emissions-te...

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