US Federal - Heavy Duty Vehicles

Status - Diesel

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The current standards for new heavy duty diesel vehicles apply from the 2010 model year; these are known as EPA 10 standards. For the light-heavy-duty categories up to 14,000 lb GVWR (Classes 2b and 3) Tier 3 emissions standards are in place. These are almost identical to the Californian LEV III light and medium duty standards.

Status - Gasoline

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The current standards, which became effective in 2008, apply to engines which are used in vehicles above 8,500 lb GVW. Note that under the Tier 2 standards for light duty vehicles, applicable from 2004, vehicles with GVW of 8,500 lb - 10,000 lb, used as personal transport (such as sports utility vehicles and people carriers), were re-classified as medium duty passenger vehicles (MDPV) and subject to light duty vehicle regulations. As with diesel engine vehicles, for the light-heavy-duty categories, up to 14,000 lb GVWR, Tier 3 emissions standards are in place.

Vehicle categories

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Cleaner Trucks Initiative

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Tier 3 (Light-heavy-duty)

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Overview

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Emissions limits - FTP test cycle

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Phase-in requirements - FTP

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Emissions limits - SFTP test cycle

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Averaging, banking and trading

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Evaporative emissions

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Emissions standards - diesel engines

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Emissions limits

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Durability requirements

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Family emissions limits

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Crankcase emissions

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Emissions standards - gasoline engines

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Emissions limits

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Useful life

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Evaporative emissions

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Test Procedures - Engines

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FTP Transient Cycle

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FTP Engine Testing - Otto-cycle

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Supplemental Emissions Test (SET)

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Not to Exceed (NTE) Test

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Smoke Test

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In-use testing

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Tier 3 Test Procedures (Light-heavy-duty)

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On-board Diagnostics

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Heavy-duty Vehicles Under 14,000 lbs GVW

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Heavy-duty Vehicles Over 14,000 lbs GVW

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Phase-in for Vehicles over 14,000 lbs GVW

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References

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Last update: 26/02/2020