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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

#11

Post by luma »

lifeisstillgood wrote: post #4

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…

It’s actually worse than that - they set goals and then manufacturers started lying to meet those goals, which told the regulators that those goals were attainable and so they set new goals. The entire notion of clean diesel is a farce and has been built on lies from the outset.

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

#12

Post by 4wsn »

lifeisstillgood wrote: post #4

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…

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.

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

#14

Post by sottol »

lifeisstillgood wrote: post #4

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…

Used to be known as emissions cheating before VW, now it's emission fraud.

Imo every manufacturer does/did it for gas and diesel engines. I've heard of gas cars in the 90s assuming that they're on a test stand if you rolled down the window shortly after starting and kept it down and reduced power output. And stories like that.

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

#15

Post by avidiax »

lifeisstillgood wrote: post #4

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…

> And no manufacturer has been able to achieve the technology to meet that level.

Urea-injection seems to work (that's what Mercedes does). But it requires another tank and special equipment.

And VW could meet the emissions requirements. That was the cheat. When they detected that they were being tested, they tuned the engine to meet emissions requirements. During normal use, the engine would make better power or efficiency but higher emissions.

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

#17

Post by fragmede »

4wsn wrote: post #12
lifeisstillgood wrote: post #4

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…

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?

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

#18

Post by Guvante »

Syonyk wrote: 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…

IIRC other manufacturers would detect the usage pattern of tests and run cleaner as a form of bypass.

Similarly you could lie on the OC2 response.

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