This
category consists of new compression-ignition engines (a.k.a. diesel
engines) that are found in a wide variety of off-road applications such
as farming, construction, and industrial. Some familiar examples
include tractors, excavators, dozers, scrapers, portable generators,
transport refrigeration units (TRUs), irrigation pumps, welders,
compressors, scrubbers, and sweepers. This category, however, does not
include locomotives, commercial marine vessels, marine engines over 37
kilowatts (kW), or recreational vehicles.
Requirements
for off-road compression-ignition engine certification include
provisions from demonstrating compliance with the applicable emission
standards using specific test procedures, as well as emission labeling
and warranty obligations. For more details on the certification
process, please go to the off-road compression-ignition webpage.
Please view additional information regarding ARB's program to reduce particulate matter
(PM) emissions from existing off-road diesel equipment. |
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| What's New |
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| Posted October 28, 2011: |
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On
December 15, 2011, the Air Resources Board will consider proposed
amendments to the California regulations and test procedures for
SORE/LSI/OHRV/Off-Road CI/Rec Marine. Specifically, the
discussion will focus on test procedures for SORE and Tier 4 Off-Road
CI, and the exhaust emission test fuel for off-road SI engines,
equipment, and vehicles. The meeting notice, staff report, and
all other regulatory documents can be found at the following link:
Board Hearing Regulatory Materials |
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| Posted April 20, 2005: |
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Draft 15-day modifications to the
off-road diesel Tier 4 regulations are now available. |
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| Posted January 19, 2005: |
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On December 9, 2004, the Board
adopted a fourth phase of emission standards (Tier 4) that are nearly
identical to those finalized by the U.S. EPA on May 11, 2004, in its Clean Air Nonroad Diesel Rule. As such, engine manufacturers are
now required to meet aftertreatment-based exhaust standards for
particulate matter (PM) and NOx starting in 2011 that are over 90
percent lower than current levels, putting off-road engines on a
virtual emissions par with on-road heavy-duty diesel engines. |
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| Posted November 14, 2004: |
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ARB is starting work on a rule to
reduce particulate matter (PM) emissions from existing off-road diesel
equipment in California. |
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| Posted October 20, 2004: |
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The Staff Report and proposed
Regulations and Test Procedures for the Tier 4 Off-Road Diesel Engine
Rulemaking will be available after 5p.m. PST, Friday, October 22, 2004. |
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| Posted October 1, 2004: |
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The Draft Proposed Regulations for
the upcoming Tier 4 Off-Road Diesel Engine Rulemaking are now
available. The submittal of comments regarding this draft is not
necessary. ARB intends to release the official proposal for a 45-day
public comment period on October 22, 2004. |
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