U.S. Department of Transportation, Climate Change Center Climate Strategies That Work: Heavy-Duty Diesel Engine Retrofit and Replacement
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2025-01-01
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Abstract:Heavy-duty vehicles and engines are significant contributors to greenhouse gas emissions and local air quality issues. Typical diesel engines in heavy-duty trucks, locomotives, port equipment, and marine vessels can last up to 30 years. The Environmental Protection Agency (EPA) estimates that over 10 million older diesel engines are in use today. Older engines are less efficient and less likely to have exhaust treatment devices like catalytic converters and diesel particulate filters. Newer and more efficient engines have lower fuel consumption and help reduce costs in the long term. Newer engines and vehicles have built-in fuel savings and emission controls, such as selective catalytic reduction, exhaust gas recirculation, and aerodynamic features.
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