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 pounds 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 for gasoline vehicles, which became effective in 2008, apply to engines which are used in vehicles above 8,500 pounds GVW. As with diesel engine vehicles, for the light-heavy-duty categories, up to 14,000 pounds GVWR, Tier 3 emissions standards are in place. 

Content overview

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Vehicle categories

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Tier 3 Emissions standards - Light-heavy duty

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• Overview
• Emissions limits - FTP test cycle
• Fleet average emissions limits
• Emissions limits - SFTP test cycle
• Averaging, banking and trading
• Evaporative emissions

Overview

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Emissions limits - FTP test cycle

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Fleet average emissions limits

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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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Tier 3 Test Procedures (Light-heavy duty)

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Emissions standards - diesel engines

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• Emissions limits
• Durability requirements
• Family emissions limits
• Crankcase emissions requirements

Emissions limits

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Durability requirements

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Family emissions limits

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Crankcase emissions requirements

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Emissions standards - gasoline engines

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• Emissions limits
• Useful life
• Evaporative emissions requirements

Emissions limits

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Useful life

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Evaporative emissions requirements

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Test Procedures - Engines

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• FTP cycle - CI engines
• FTP cycle - SI engines
• Supplemental Emissions Test (SET)
• Not to Exceed (NTE) Test
• Smoke Test
• In-use testing

FTP cycle - CI engines

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FTP cycle - SI engines

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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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On-board Diagnostics

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• Heavy Duty Vehicles under 14,000 pounds GVW
• Heavy Duty Vehicles over 14,000 pounds GVW

Heavy Duty Vehicles under 14,000 pounds GVW

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Heavy Duty Vehicles over 14,000 pounds GVW

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References

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