Green Car Congress
AUGUST 5, 2019
The study was conducted in 2018 by West Virginia University’s Center of Alternatives Fuels, Engines, and Emissions (CAFEE). West Virginia University’s Center for Alternative Fuels Engines and Emissions (CAFEE) completed two types of tests at different times of the year during 2018 on four Blue Bird school buses.
Green Car Congress
JANUARY 28, 2019
Fewer soot particles in the exhaust stream of aircraft reduces the formation of ice crystals and therefore the climate impact of the resulting contrail cirrus. For example, new engine technologies enable soot emissions to be reduced as a result of combustion at higher temperatures, even using conventional fuels. —Burkhardt et al.
Green Car Congress
MARCH 16, 2017
The possibility of reducing the engine exhaust soot emissions by more than half using biofuels paves the way for reducing the climatic impact of contrails. They followed a NASA DC-8 research aircraft at close distances ranging from 30 to 150 meters to measure exhaust composition from each of the inboard engines.
Green Car Congress
NOVEMBER 22, 2016
The ISL G NZ features the same Stoichiometric cooled Exhaust Gas Recirculation (SEGR) combustion technology, spark ignition, and simple TWC aftertreatment as the ISL G natural gas engine. The recent procurement of both CNG buses and engines will help the agency reduce its current NO x emissions by more than 90% in 2018. Earlier post.).
Green Car Congress
JUNE 2, 2016
The ISL G NZ features the same stoichiometric cooled Exhaust Gas Recirculation (SEGR) combustion technology and spark ignition as the ISL G natural gas engine. The Cummins Westport ISL G and ISX12 G spark ignited natural gas engines use Stoichiometric combustion with cooled exhaust gas recirculation (EGR) and a Three-Way Catalyst (TWC).
Green Car Congress
MAY 9, 2015
Mandate a fraction of bus purchases to be zero emission technology starting in 2018, and set a goal of complete transit fleet transition to zero emission technologies by 2040. Urban bus fleets had to select either a diesel path or an alternative-fuel path.
Green Car Congress
APRIL 29, 2018
We combine rich panel data on road congestion, ambient NO x concentrations (as a signature of diesel exhaust), and hospital admissions and deaths. Relative to North America, Europe’s households have significantly adopted diesel cars over gasoline and alternative fuels.
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