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ORNL study quantifies fuel economy costs of common driver practices and vehicle alterations

Green Car Congress

They presented their results in a paper at SAE 2014 World Congress in Detroit. l/100 km) at 60 mph (97 km/h) to 33 mpg (7.1 They first subjected a compact passenger sedan and a sport utility vehicle to SAE J2263 coastdown procedures. The compact sedan, a 2009 Toyota Corolla with a 1.8-liter l/100 km) at 60 mph to 22.9 l/100 km).

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SwRI D-EGR gasoline demo vehicle delivers diesel efficiency at lower cost; potential for LEV III/Tier 3 emissions

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mpg) and a 9.2% Southwest Research Institute (SwRI) announced preliminary test results of its Dedicated-Exhaust Gas Recirculation (D-EGR) demonstration vehicle ( earlier post ) at the SAE 2014 World Congress in Detroit. With D-EGR, one or more cylinders have their exhaust connected directly to the intake system.

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Tula Technology reports up to 18% fuel economy gain in GM 6.2L V8 using Dynamic Skip Fire technology; emissions benefits too

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In a paper presented at the 2016 SAE World Congress, Tula Technology, developer of Dynamic Skip Fire (DSF) cylinder deactivation technology, reported significant fuel economy gains of up to 18% over a conventional GM 6.2-liter mpg at DSF versus 17.34 mpg at V8 mode. liter V8 by operating using Dynamic Skip Fire. and Younkins, M.

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Study finds NYC Clean Air Taxi rules successful in cutting pollution

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mpg, and corresponding estimates of nitric oxide (NO) and total particulate (PM T ). exhaust emissions declined by 82% and 49%, respectively. The findings are published in the Journal of Exposure Science & Environmental Epidemiology. The scientists report that overall fuel efficiency of the medallion taxi fleet climbed from 15.7

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Audi introduces new high-efficiency 2.0L TFSI based on Miller cycle; 190 hp, 47 mpg

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mpg US) in the NEDC, clearly undercutting both its predecessor and comparable competitors. Contributing to this benefit is also the exhaust manifold, integrated in the cylinder head. The four-cylinder engine delivers 140 kW (190 hp) and 320 N·m (236.0 The engine also features low fuel consumption levels of less than 5.0

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ORNL researchers quantify the effect of increasing highway speed on fuel economy

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No obvious pattern for specific vehicle types in terms of fuel economy percent change with speed has yet emerged (for example, results for SUVs were similar to small sedans or pickup trucks in terms of percent change in mpg). Percent mpg decrease for a given 10 mph increase based on 74 vehicles. Brief summary of vehicle data.

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GM details 2016 Chevrolet Malibu Hybrid powertrain design and operation

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The 2016 Chevrolet Malibu Hybrid ( earlier post ) is EPA-rated at 46 mpg (5.11 The 2016 Chevrolet Malibu Hybrid ( earlier post ) is EPA-rated at 46 mpg (5.11 At the 2016 SAE World Congress, GM engineers presented a paper describing the development of the new hybrid powertrain for the popular mid-size sedan. liter engine.