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EPA fuel economy report finds weight and power leveling off, footprint stable

Green Car Congress

EPA recently released the latest edition of its annual report Light-Duty Automotive Technology, Carbon Dioxide Emissions and Fuel Economy Trends. The report found that fuel economy for the US fleet continues to improve. The report found that fuel economy for the US fleet continues to improve.

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Update on the ACCESS fuel efficient engine project; simulations find up to 48.9% improvement in fuel economy over baseline

Green Car Congress

At the recent 2013 SAE World Congress, engineers from Bosch and AVL presented papers on progress in the ACCESS project, describing the design, combustion development and controls development for a resulting 4-cylinder gasoline turbocharged direct injection (GTDI) engine with part-load HCCI capability. V6 accelerates from 0-60 mph in 5.5

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Argonne study identifying fuel consumption penalties for CNG use in conventional light-duty vehicles; optimization pathways

Green Car Congress

Light-duty vehicle fuel economy penalties for CNG in conventional engines, with and without scaling for performance equivalence. the CNG-fueled engine has lower performance) and up to a 12% fuel consumption penalty when the engine is resized (i.e., “up-sizing”) seconds for gasoline. Source: ANL.

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ORNL study finds multi-mode RCCI can offer 15%+ fuel economy improvements across multiple light-duty driving cycles

Green Car Congress

Drive cycle fuel economy for PFI, CDC, and multi-mode RCCI operation. Among their findings were that multi-mode RCCI has the potential to offer greater than 15% fuel economy improvement over a 2009 gasoline PFI baseline over many light-duty driving cycles, despite the lack of complete drive cycle coverage for RCCI mode.

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Study finds 6.3% spread in fuel economy obtained with maximum and minimum rolling resistance tires

Green Car Congress

spread between the fuel economy obtained with maximum and minimum rolling resistance tires. At the average 2015 price of regular gasoline, the obtained fuel-consumption extremes result in a $78 difference in the annual cost of gasoline per light-duty vehicle, Sivak said. with a median of 10.28 mpg (RRf at 8.1

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Ford unveils new Focus; 10% better fuel economy; focus on tech; gasoline and diesel

Green Car Congress

The new Focus features a broad suite of Ford advanced driver assistance technologies and advanced EcoBoost gasoline and EcoBlue diesel engines offering a 10% fuel-efficiency improvement across the range. Additional underbody shielding for the central tunnel, fuel tank and rear axle. ACC works at speeds up to 200 km/h (125 mph).

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Mercedes-Benz previews new GLA compact SUV; fuel economy as high as 54.7 mpg in diesel version

Green Car Congress

liter gasoline engines will extend from 115 kW (156 hp) in the GLA 200 to 155 kW (211 hp) in the GLA 250. The GLA 200 CDI develops 100 kW (136 hp) and maximum torque of 300 N·m (221 lb-ft), with fuel consumption of 4.3 seconds, with a top speed of 235 km/h and a combined fuel consumption figure of 7.1 Earlier post.)