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DTF: Diesel dominates commercial truck, transit and school bus fleets in US

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Diesel is the predominant technology in commercial trucking, school, and transit bus sectors, according to the Diesel Technology Forum’s analysis of data sourced from S&P Global Mobility TIPNet data of vehicles in operation for Class 3-8 as of December 2021. Of the largest trucks (Class 8) in operation, 97% are diesels.

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Study estimates global black carbon emissions up 72% from 1960-2007; BC emissions intensity down 52%

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Black carbon emissions and BC emissions intensity per year. A study led by a team from Peking University has estimated that global black carbon (BC) emissions increased from 5.3 teragrams per year in 2007 (+72%). Among their findings: The residential sector is the most important anthropogenic BC emission source.

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New inventory of black carbon emissions from China finds 2007 levels higher than previously reported

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BC emission map of China at 0.1° × 0.1° for year 2007. Major emission areas are marked. A new black carbon (BC) emissions inventory from China found BC emissions levels in 2007 of 1,957 Gg BC—higher than reported in earlier studies. Credit: ACS, Wang et al. Click to enlarge. Earlier post.).

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CRC ACES Phase 2 report finds emissions from modern heavy-duty diesels well below required levels

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2010 engines emissions reduction relative to 2010, 2007, and 2004 US emission standards. The study, the Phase 2 Report of the comprehensive Advanced Collaborative Emissions Study (ACES). The study, the Phase 2 Report of the comprehensive Advanced Collaborative Emissions Study (ACES). Source: CRC. Click to enlarge.

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Diesel Technology Forum: 57% of all commercial diesel trucks on the roads in US are near-zero emissions models

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Analysis of a study by S&P Global Mobility shows the number of new near-zero emission diesel trucks on the road in the US increased 10.2% between 2021 and 2022, according to the Diesel Technology Forum (DTF). Near-zero emission trucks are advanced diesel technology manufactured in the 2010 and later model years.

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US EPA awards $9.6M in DERA grants to reduce harmful diesel emissions in California

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million in Diesel Emission Reduction Act (DERA) grants to public and private partners in California. The funds will be used to retrofit and replace old, polluting diesel vehicles and equipment, including school buses, heavy-duty trucks, tractors and port equipment. The US Environmental Protection Agency (EPA) awarded $9.6

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New split-cycle concept to control diesel HCCI combustion

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A team from Universita degli Studi di Pisa (Italy) and Rolf Reitz at the University of Wisconsin-Madison are proposing a novel combustion concept—Homogenous Charge Progressive Combustion (HCPC)—based on a split-cycle principle to control HCCI combustion in diesel-fueled engines. ICEF2007-1743 (2007). —Musu et al.

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