Question in U.S. Diesel Emission Standards

In summary, the conversation discusses the differences between "Tier", "EPA", and "California" Emission Standards in the US, specifically in terms of their legal and application areas. It also mentions the differences between on-road and off-road standards for emissions. The EPA sets emissions levels by "Tier" and CARB may have similar standards. On and off-road standards have similar allowable pollutant concentrations but differ in introduction dates and calculation methods.
  • #1
Su Solberg
75
0
I wonder is what are the legal and application area difference between "Tier","EPA" and "California" Emission Standard in U.S (I am not asking the allowable emission levels).

Also, Is there any difference in on-road and off-road standads(again, I am not asking the emission levels)?

Thanks for your kind help in advence.
 
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  • #2
The EPA set emissions levels by "Tier" (e.g. "this Tier 4 level the EPA have set is a right bastard!"). The two are synonymous. Don't know about CARB, I'll do some reading at work and let you know later in the week.

On and off-road standards (for EPA and EU) are broadly the same in terms of allowable pollutant concentrations, but do differ in introduction dates, and (depending on application) the way the figures are calculated. That is to say, we (industrial) are currently developing to meet Tier 4 emissions levels but the automotive guys did this a while back.
 

FAQ: Question in U.S. Diesel Emission Standards

What are U.S. diesel emission standards?

U.S. diesel emission standards are regulations set by the Environmental Protection Agency (EPA) to limit the amount of pollutants that can be emitted from diesel engines. These standards aim to reduce air pollution and protect public health.

Why are diesel emission standards important?

Diesel engines emit pollutants such as nitrogen oxides, particulate matter, and carbon monoxide, which can have negative impacts on air quality and human health. By setting emission standards, the EPA helps to reduce these harmful pollutants and improve overall air quality.

How do U.S. diesel emission standards compare to other countries?

The U.S. has some of the strictest diesel emission standards in the world. These standards are constantly being updated and improved to keep up with advancements in technology and to continue reducing harmful emissions.

What are the consequences for not complying with U.S. diesel emission standards?

Failure to comply with U.S. diesel emission standards can result in fines and penalties for manufacturers and vehicle owners. Non-compliant vehicles may also be subject to recalls or restrictions on their use.

Are there any exemptions to U.S. diesel emission standards?

There are some exemptions to U.S. diesel emission standards for certain types of vehicles, such as military vehicles, or for small businesses that meet certain criteria. However, these exemptions are limited and most diesel engines are required to meet the standards set by the EPA.

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