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Westport Fuel Systems & AVL conclude high-efficiency H2 powertrain can outperform fuel cells in TCO for heavy-duty applications

Green Car Congress

Hydrogen operation with the current WFS HPDI fuel system outperforms natural gas in terms of thermal efficiency, mainly due to lower equivalence ratio for H 2 at given fueling energy level, higher kinetic energy for H 2 jets as well as higher tolerance of H 2 combustion to fuel rich operation. Source: Westport/AVL.

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ICCT reviews real-world tractor-trailer fuel economy in US, China and Europe

Green Car Congress

followed by the EU, with China having very few sources to reference other than chassis dynamometer results. The data available in each category for each region varied widely; the study found the largest number of publicly available sources for the U.S.,

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Study finds recent achieved CAFE performance outpacing levels projected to be achieved by NHTSA

Green Car Congress

Achieved Corporate Average Fuel Economy (CAFE) fuel economy performance has exceeded the anticipated levels for 2012 and 2013 model years—the two years that the current standard has been in effect—according to a new analysis by Michael Sivak and Brandon Schoettle at the University of Michigan Transportation Research Institute (UMTRI).

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DOE seeking input on analysis methodology and assumption for estimating total cost of ownership of future advanced vehicle technologies

Green Car Congress

DOE asks respondents to comment on methodology to ensure a common ground for the various technologies and appropriate levels of success for comparison. The basis for any proposed changes to the assumptions (aggressive, moderate and conservative) should be provided (along with references where available).

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Ricardo supporting Detroit Materials in commercialization of innovative lightweight steels

Green Car Congress

GJS refers to a grade range for conventional ductile irons—e.g., Specific strength and specific strength/$ comparison of different materials. ADI is the most recent addition to the family of ductile irons, and is produced by giving conventional ductile iron a special austempering heat treatment. EN-GJS-500-7. Source: DM.

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Road Test: 2024 Cadillac XT4 Premium Luxury FWD

Clean Fleet Report

The fuel economy, which is best in Touring mode, is rated by the EPA at 24 mpg city/29 highway/26 combined mpg. The Active Fuel Management system helps reduce fuel consumption by temporarily deactivating some of the engine’s cylinders in certain driving conditions. The first thought is this references a 3.5-liter

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Ford researchers: global light-duty CO2 regulatory targets broadly consistent with 450 ppm stabilization

Green Car Congress

They refer to these emission trajectories as the global CO 2 caps. Holding vehicle efficiencies, powertrain shares and fuel characteristics constant at 2010 levels, they then considered the effect of only vehicle actions. Similarly, with the addition of fuel actions, the OECD Europe glide paths are relaxed from 4.5-5%

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