What does HDD stand for?

Heavy-Duty Diesel

This definition appears very rarely and is found in the following Acronym Finder categories:

Science, medicine, engineering, etc.

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Samples in periodicals archive:

Byline: Mamta03 New York state has mandated heavy-duty diesel trucks owned by state entities and by contractors working on behalf of the state be retrofitted to cut emissions by 2011.

United States: NY imposes diesel rules

Each unit in the NLB 225 Series is available with a choice of heavy-duty diesel engines--200, 230, 275 or 300 hp.

Water jet cleaning

com) is designed to permit off-road and heavy-duty diesel vehicles to meet U.

Sensing soot

In an effort to continue supporting a rugged and demanding Australian trucking market, Detroit Diesel is putting a significant amount of testing and development effort into a unique 1,850 power rating for the Series 60(R) heavy-duty diesel engine.

DETROIT DIESEL'S NEW ENGINE WILL BE EMISSIONS COMPLIANT

Holset Turbo- chargers is the world's largest manufacturer of turbochargers for the medium to heavy-duty diesel engine market.

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As the tobacco suits were going forward, the EPA was suing and settling with the major producers of heavy-duty diesel engines.

Regulation by litigation: diesel engine emission control

Heavy-duty diesel equipment now only has modest emissions restrictions and is responsible for more than 240 tons per day of smog-forming emissions in the Los Angeles region, making these nonroad engines the third-largest polluters, officials say.

EPA SETS HEARING ON NEW DIESEL RULES

Their dominance is due to almost complete penetration of diesel technology, as well as the high cost of these heavy-duty diesel engines, which feature the most expensive technologies for low emission and high efficiency operation.

US DIESEL ENGINES & PARTS DEMAND TO INCREASE NEARLY 5% ANNUALLY ...