The California Air Resources Board will consider the proposed Heavy-Duty Low NOx Omnibus Regulation on 27 August 2020. The proposed regulation is intended to ensure reductions in smog-forming NOx and protect communities most impacted by air pollution.
On-road heavy-duty vehicles are an essential part of the state’s economy. These vehicles are also significant sources of oxides of nitrogen (NOx) and particulate matter (PM), contributing nearly 31% of all statewide NOx emissions as well as 26% of total statewide diesel PM emissions.
Source: CARB
The Proposed Heavy-Duty Engine and Vehicle Omnibus Regulation would implement two measures included within California’s Revised 2016 State Strategy for the State Implementation Plan: “Low-NOx Engine Standard” and “Lower In Use Emission Performance Level.”
CARB’s Proposed HD Omnibus Rulemaking would comprehensively overhaul exhaust emission standards and test procedures and other emission-related requirements for 2024 and subsequent model year California-certified HD engines.
Highlights of the regulation include:
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Lower NOx and PM emission standards on existing regulatory cycles as well as a new NOx standard on a new low-load certification cycle. The NOx standards would be cut to about 75% below current standards beginning in 2024 and 90% below current standards in 2027.
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A revamping of the heavy-duty in-use testing program.
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Warranty, Useful Life, and Emissions Warranty Information and Reporting improvements.
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Strengthening the heavy-duty durability demonstration program.
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Emissions averaging, banking, and trading program improvements.
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Powertrain certification test procedures for heavy-duty hybrid vehicles.
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August 11, 2020 at 04:07PM
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CARB to consider low NOx heavy-duty omnibus regulation on 27 August - Green Car Congress
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