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New Jersey man pleads guilty to nationwide conspiracy to violate the Clean Air Act by remotely disabling pollution control devices on diesel trucks (www.justice.gov)

submitted 1 day ago* (last edited 19 hours ago) by Joker to c/[email protected]

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According to records filed in the case, Achtemeier conspired with mechanics in garages and operators of truck fleets to disable the anti-pollution software installed on diesel trucks.

Coconspirators who wanted to disable their trucks’ pollution control hardware system—a process commonly known as “deleting”—sought Achtemeier’s help to trick the truck’s software into believing the emissions control systems were still functional, a process known as “tuning.”

Monitoring software on a deleted truck will detect that the pollution control hardware is not functioning and will prevent the truck from running. Achtemeier disabled the monitoring software on his client’s trucks by connecting to laptops he had provided to various coconspirators. Some of the coconspirators would pass the laptop on to others seeking to have the anti-pollution software disabled on their trucks. Once the laptop was hooked up to the truck’s onboard computer, Achtemeier could access it from his computer and tune the software designed to slow the truck if the pollution control device was missing or malfunctioning. Achtemeier could “tune” trucks remotely, which enabled him to maximize his environmental impact and personal profit.

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[–] [email protected] 3 points 22 hours ago

The EGR and DPF systems used in diesel trucks cause (or caused, it’s been a while since I last looked it up) a big reduction in fuel mileage. I think it was a 2 or 3 MPG reduction.Doesn’t sound like much, but it adds up when you are running 200,000+ miles a year per truck. With the system running I believe the average fuel mileage for the trucks in our company is around 6 to 8 MPG depending on the route.

I think it's worth noting that this is an environmental benefit, not only an economic one. In other words, it's not that people defeating the emissions control devices are making their trucks purely worse for the environment for their own selfish benefit; it's that they're making a trade off between increased 'regular' (for lack of a better term) pollutant emissions like NO~x~/SO~x~/particulates, and decreased greenhouse gas emissions (CO~2~).

I'm not saying they're altruistic -- obviously they do it to save money (at least until they get caught and fined) -- but I am saying that we can't just assume it's bad without first doing the math and making a value judgement about what sorts of emissions we care about.

Geeking out about an edge case where not having the fancy emissions controls is better: using biodiesel

There are also more complicated considerations, such as how getting rid of these emissions controls and retuning the engine may also allow it to run on higher percentages of biodiesel. The trade-offs associated with that are not only the fact that the fuel becomes carbon-neutral (net CO~2~ emissions go to zero, at least for the percentage of the fuel that is bio- instead of dino-), but also that biodiesel naturally has zero sulfur in it (which means zero SO~x~) and burns cleaner (fewer particulates) and hotter (more NO~x~) than dino-diesel. On top of that, more NO~x~ could be a bad thing or a good thing, depending on whether you're driving in a NO~x~-limited or VOC-limited regime.

In other words, using 100% biodiesel in an urban environment (VOC-limited) is IMO enough to actually justify preferring not to have the fancy emissions controls for legit environmentalist reasons: the better efficiency in general (as the parent comment mentioned), zero net greenhouse gas emissions, zero SO~x~, irrelevant NO~x~, and all at the cost of only moderate particulates (more than would be emitted from a vehicle with a DPF, but less than would be emitted if the same car were burning dino-diesel).

Of course, none of those benefits occur unless you actually seek out B100 (or at least, significantly higher percentages than the B5 that normal diesel can be blended up to), and that's a motivation much more associated with the hippie types that drive VW TDIs and old Mercs, not truckers.