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The gaseous and particulate matter (PM) emissions from three heavy-duty natural gas vehicles, including a lean-burn bus with an oxidation catalyst and two stoichiometric Class 8 trucks with three-way catalysts were evaluated. Testing was performed on a range of three to seven different test fuels with varying Wobbe and methane numbers. The lean-burn vehicle showed general trends of higher emissions...
This study investigated the impacts of varying natural gas composition on the exhaust emissions from different technology transit buses. For this study, two CNG (compressed natural gas) buses equipped with lean burn combustion and OCs (oxidation catalysts), and one stoichiometric CNG bus equipped with a TWC (three-way catalyst) and EGR (exhaust gas recirculation) were tested on a chassis dynamometer...
This study investigated the impact of varying natural gas composition on the exhaust emissions from a waste hauler equipped with a 2002 Cummins 8.3L, C Gas Plus, lean burn, spark ignited natural gas engine and an oxidation catalyst while operated on the William H. Martin Refuse Truck Cycle on a chassis dynamometer. The vehicle was tested on seven different fuel gas blends with varying compositions...
Interest is growing in the expanded use of natural gas as an alternative to conventional liquid fuels for use in automotive internal combustion engines. This study investigates the implications of natural gas composition on the gaseous pollutants, fuel economy, and the engine power output of two light-duty vehicles (a 2002 Ford Crown Victoria and a 2006 Honda Civic GX) operated over different driving...
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