US Federal - Non-road Engines and Vehicles

Status

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For non-road diesel applications such as generator sets and construction equipment, final Tier 4 standards became effective from the 2015 model year. Large non-road spark ignition engines are subject to Tier 2 regulations, which have been in place since 2007. Recreational vehicles, comprising snow mobiles, off-highway motorcycles, all terrain vehicles (ATVs) and some utility vehicles, are certified under separate standards. Small spark-ignition engine regulations are also in place, and, currently, Phase 3 standards apply. Commercial and recreational marine engines are covered in the separate US Federal - Marine entry.

Federal Regulations

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Non-road diesel engines

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Final Tier 4

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Not-to-exceed (NTE) limits

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Crankcase emissions

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Smoke emissions

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Useful life

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Transport Refrigeration Units

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Non-road large SI engines (>19 kW)

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Applications

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Emissions limits

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Useful life

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Voluntary standards

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Evaporative and crankcase emissions

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Non-road small SI engines ( ≤ 19kW)

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Overview

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Phase 3 - Handheld engines

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Phase 3 - Non-handheld engines

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Phase 3 - Useful life periods

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Evaporative emissions

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Crankcase emissions

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Recreational vehicles

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Introduction

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Snowmobiles

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Off-highway motorcycle and ATVs

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Mines

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Introduction

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Metal and nonmetal mines

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Coal mines

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Test Procedures

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Non-road diesel engines

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Large SI engines

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Small SI engines

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Recreational vehicles

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Historical Data

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Non-road diesel engines

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Interim Tier 4

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References

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Last update: 15/05/2019