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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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2014 Jeep Grand Cherokee offers new 3.0L EcoDiesel V-6 and 8-speed for 30 mpg highway

Green Car Congress

Among the many features of the new 2014 Jeep Grand Cherokee—introduced at the Detroit Auto Show—two in particular contribute to significantly improved fuel economy and driving performance: an optional new 3.0-liter That powertrain delivers 30 mpg (7.8 liter V-8, now achieving up to 21 mpg highway. Click to enlarge.

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Hyundai introduces Veloster 3-door coupe; up to 40 mpg highway

Green Car Congress

Hyundai introduced its Veloster three-door coupe in a world debut at the North American International Auto Show in Detroit. liter direct-injected four-cylinder engine mated to Hyundai’s first dual-clutch transmission and is estimated to deliver up to 40 mpg highway. The 2012 Veloster features a new 1.6-liter

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J.D. Power and Associates study finds EPA emission-compliant heavy-duty engines yielding increase in engine problems, decline in satisfaction

Green Car Congress

The most commonly reported engine problems are issues with the electronic control module calibration (cited by 23% of owners who experienced an engine problem), exhaust gas recirculation (EGR) valve (20%), and electronic engine sensors (16%). miles per gallon (mpg) in 2012, compared with 6.0 mpg in 2011. Overall Scores.

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

Green Car Congress

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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GM Testing Indicates 2010 Chevrolet Equinox Will Offer Best-In-Segment Highway Fuel Economy of 32 mpg

Green Car Congress

liter I-4 engine will offer an EPA estimated 32 mpg on the highway and 22 mpg city. The 2010 Equinox will likely carry a 32 mpg highway rating. At 32 mpg, the 2010 Equinox will offer best-in-segment highway fuel economy and have a highway driving range of up to 600 miles. GM expects final official EPA estimates shortly.

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

Green Car Congress

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.