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Study Assesses Product Attribute Trade-offs and Technological Progress; Meeting Proposed Obama Fuel Economy Standards Will Require Downsizing and Change in Fleet Mix

Green Car Congress

Changes in the attributes (clockwise from upper left, weight, power, fuel economy and torque) of the Honda Accord over time as an example of fleet trends in the US. In contrast, fuel economy actually increased by 15% during that period. Knittel, 2009. Click to enlarge. Knittel, 2009.

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Lightning Hybrids releases initial emissions testing results for medium-duty hydraulic hybrids

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liter V10 and a 2010 GMC 3500 Savana Cutaway 6.0-liter Hydraulic pumps/motors and an accumulator (power storage unit) are added to gasoline, diesel, propane or CNG engines to store braking energy and use the captured energy to accelerate the vehicle, significantly saving fuel and brakes and cutting emissions. mph), low 2.1 mph with 3.8

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Perspective: A View Into the New GM

Green Car Congress

The morning session started out with an hour long press conference, the highlight being the unveiling of the Volt’s 230 mpg preliminary EPA city fuel economy finding ( earlier post ), as well as a tour showing selected elements from the studios of the four GM North American brands: Chevrolet, GMC, Buick and Cadillac.

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GM and Chrysler Submit Updated Restructuring Plans; Up to $18.6B More Needed; Outlines for Product Plans

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In the US, GM will focus on its core brands; Chevrolet, Cadillac, Buick and GMC. Pontiac will serve as a focused brand with fewer entries, within the Buick-Pontiac-GMC channel. GM Fuel Economy plans. These industry planning volumes are more conservative than those being used by most other industry sources.

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Details on GM’s new efficient top-end 8-speed automatic

Green Car Congress

The 8L90, the replacement for the venerable 6L80 six-speed in GM’s lineup, is offered as well as standard on 2015 Chevrolet Silverado, GMC Sierra and GMC Yukon Denali/Yukon XL Denali models equipped with the 6.2L increase in fuel economy over the previous six-speed automatic—and a quicker 0-60 time of 3.7

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