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SAE Publishes Revised J1711 Standard to Measure Exhaust Emissions and Fuel Economy of Hybrids and Plug-in Hybrids

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The new version supersedes the J1711 standard originally published in March 1999. Also, the list of standard test procedures addressed in SAE J1711 has been expanded to cover all five major test cycle procedures (UDDS, HFEDS, US06, SC03, and Cold FTP) now being used to evaluate vehicle fuel economy. Earlier post.) Earlier post.)

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SAE Hybrid Standards Committee: Works In Progress For 2009

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Active standards work. During the SAE 2009 World Congress in Detroit, Gary Kissel of General Motors presented an update of hybrid, plug-in hybrid, and electric vehicle standards being revised or developed by the Society of Automotive Engineers (SAE) Hybrid Standards Committee. by Jack Rosebro. Click to enlarge. J1772: Charging.

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CARB releases results of multi-year E15 study; multiple air quality benefits with slight reduction in fuel economy

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The California Air Resources Board (CARB) has released the results of a multiyear study evaluating exhaust emissions from the use of California Reformulated Gasoline (CaRFG) that contains 15 volume percent ethanol (E15). The vehicle test matrix had provisions for five vehicles on each emissions standards category (i.e.,

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UC Riverside team examines influence of mid-and high-level ethanol blends on pollution from GDI flex fuel vehicle

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Data presented as mean ± standard deviation, N=3. the E30 and E78—led to statistically significant reductions of 9%–13% for total hydrocarbon (THC); 13%–44% for non-methane hydrocarbon (NMHC); 20%–35% for carbon monoxide (CO); and 17%–36% for nitrogen oxides (NO x ) emissions compared to the high-aromatics E10 fuel.

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Study finds reduction of low-frequency noise from transition to electric buses improved residents’ health

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In parallel, noise measurements were performed in several homes—including indoors, which is not otherwise standard procedure. The changes that took place between phases one and two were clear and statistically significant. There was also a clear reduction of perceived health effects.

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New study to investigate emissions from commercial buses in fleet operations

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Brighton & Hove operates a fleet of approximately 280 modern buses in and around the city of Brighton & Hove which, according to recent Department for Transport statistics, boasts the country’s highest—and consistently growing—number of bus journeys per head of population outside London.

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Study finds PM from biodiesel blends may be 50-80% less toxic per unit PM mass than from petroleum diesel

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In the study, the team examined the relationships between biodiesel fuel blend, exhaust particle oxidative potential (OP), and PM composition. OP in oxidized aerosols, including engine exhaust, is commonly quantified using the DTT (dithiothreitol) assay. PM-normalized DTT Activity for biodiesel exhaust PM.

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