New options for clean diesel passenger cars
To facilitate the transition to
cleaner, light-duty diesel vehicles, EPA is providing diesel manufacturers
with two voluntary interim compliance options for meeting EPA
The standards, known officially
as the Tier 2 Vehicle and Gasoline Sulfur Rulemaking, significantly
reduces the emissions from new passenger cars and light trucks.
The two voluntary compliance
options apply to nitrogen oxide requirements for diesels during
compliance testing at high altitudes and high speed/high acceleration
conditions. Manufacturers choosing these options will be required
to meet more stringent requirements in other aspects of the Tier
2 program, including tighter particulate matter standards and
longer useful life of the vehicle. These voluntary options are
available for three years—model years 2007 through 2009.
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