Скачать или смотреть New EPA Rules and What They Mean for You

A recent policy change from the EPA has addressed a major problem for truck drivers: the sudden and dangerous derating of a vehicle when its Diesel Exhaust Fluid (DEF) system malfunctions. The old system could cause a truck to slow down to as little as five miles per hour, creating a serious safety hazard on the road. The new guidance aims to make this process much safer and more reasonable. It provides a staged approach to torque reduction, giving drivers a much longer grace period to get the issue repaired before the vehicle becomes inoperable.

The new rule, which applies to trucks from model year 2027 onward, will come in stages. The first stage will allow a driver to complete a load, providing up to 10 hours or 650 miles before any performance changes occur, other than a warning light. After this, the truck will enter a second stage with a 15% torque reduction, allowing it to operate for up to 4,200 more miles or about two weeks. A third stage will reduce torque by 30%, and a final stage will limit speed to 25 mph, but the entire process could take up to 30 days before the truck is fully restricted. This is a major improvement from the previous system, which could drop a vehicle's speed to 5 mph within four hours of a fault.

For trucks already in use (model years 2009-2026), the EPA is urging manufacturers to voluntarily issue software updates to implement these new changes. The rule does not eliminate DEF systems. Instead, it is a common-sense solution to a real-world problem, giving drivers a reasonable amount of time to get their vehicle repaired without creating a dangerous situation on the highway. The goal is to provide a sensible and safe process for handling DEF system failures.

10 Key Takeaways:
The EPA's new guidance addresses a safety issue caused by sudden derates when a truck’s DEF system malfunctions.
A derate could previously cause a truck's speed to drop to as low as 5 mph, creating a hazard on the road.
The new rule establishes a staged approach to derates, providing a longer time to get a vehicle repaired.
The first stage provides up to 10 hours or 650 miles with only a warning light.
A 15% torque reduction kicks in after the initial period and lasts for up to 4,200 miles.
The truck remains drivable through multiple stages of torque reduction, with the final stage limiting speed to 25 mph.
The entire process could take up to 30 days before the truck becomes essentially inoperable.
The new rules are mandatory for new trucks beginning with the 2027 model year.
For existing trucks, manufacturers are encouraged to issue software updates to implement the changes.
The DEF system itself is not being eliminated; the rule simply makes the failure process safer and more manageable.

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Chapter Markers:

00:00 - Introduction to the DEF system problem.
00:30 - The new EPA rule and its purpose.
01:21 - Misconceptions about the rule and DEF systems.
02:08 - The new staged approach to derates.
03:05 - The timeline for new and existing trucks.
04:00 - A quick recap of the rule's key points.
04:55 - The four stages of derate in detail.
05:40 - The safety benefits of the new rule.

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