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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 is the authoritative reference for real-world fuel economy, technology trends and tailpipe carbon dioxide emissions, for new personal vehicles sold in the US every year since 1975.

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GM: new Sierra 5.3L V-8 EcoTec3 highway fuel economy tops Ford EcoBoost V-6

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EcoTec3 V-8 engine ( earlier post ) equipped with direct injection, cylinder deactivation (AFM) and variable valve timing to achieve EPA estimates of 16 mpg city (14.7 l/100 km) with two-wheel drive or 16/22 mpg (14.7/10.7 2WD Pickup truck fuel economy comparisons. 2WD Pickup truck fuel economy comparisons.

Sierra 262
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GM Korea introduces Alpheon eAssist; 25% improvement in fuel economy

Green Car Congress

GM Korea introduced the Alpheon eAssist, the first hybrid vehicle from the company and the first hybrid vehicle in its segment in Korea. The new Alpheon eAssist, which will go on sale in November, offers improved fuel economy of 25% and reduced CO 2 emissions of 22% compared with the standard Alpheon model. mpg US, 7.1

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GM develops integrated exhaust manifold cylinder head for 3.6L V6 direct injection engine; improvement in performance, fuel economy, emissions and noise

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The reduced complexity of the design of the new integrated exhaust manifold cylinder head ( bottom ) compared to the old ( top ). GM has combined the exhaust manifold with the cylinder head into a single aluminum casting in the 2012 Camaro 3.6L direction injection V6, achieving both better fuel economy while reducing emissions.

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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.

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GM to double models with 40 mpg highway or better by 2017; ongoing manufacturing efficiency improvements

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GM has made three product commitments for 2017 related to its sustainability strategy: to have 500,000 vehicles on the road in the US with some form of electrification ( earlier post ); to double the number of US models that can achieve an EPA-estimated 40 mpg US (5.9 In 2012, GM invested more than $7.3 Earlier post.).

GM 275
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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.