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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

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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.

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DOT, EPA unveil joint proposal for fuel economy and greenhouse gas emission standards: 49.6 mpg CAFE, 163 g/mile GHG in 2025; flexibilities and incentives

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The US Environmental Protection Agency (EPA) and the US Department of Transportation (DOT) formally unveiled their joint proposal to set stronger fuel economy and greenhouse gas pollution standards for Model Year 2017-2025 passenger cars and light trucks. EPA’s proposed GHG standards, which are. mpg US (5.87 mpg US (5.87

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VW Premieres New Polo GTI; Textbook Downsizing Results in 25% Reduction in Fuel Consumption from Predecessor

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The new Polo GTI, in what Volkswagen is calling “textbook downsizing”, is powered by a new 1.4-liter The engine, which delivers 132 kW (177 hp), is coupled with a 7-speed DSG as standard. At the same time, it is VW’s most fuel-efficient and lowest emitting GTI. Combined fuel consumption is 5.9

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HyBoost concept achieving close to Prius-level CO2 emissions; aggressive downsizing with advanced boosting and micro-hybrid system

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variant but with fuel economy of a strong hybrid. HyBoost achieves this by combining aggressive 50% downsizing of the engine with an electric supercharger for transient low-speed performance, and a micro-hybrid stop-start and energy recuperation systems, Boggs said. Downsizing the 2.0-liter Click to enlarge. Click to enlarge.

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Study Finds Strong Synergy Between Spark Ignition Engine Downsizing and Low-to-Moderate Alcohol Blend Fuels

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A study by engineers from Mahle Powertrain Ltd and BP found strong synergy between spark ignition (SI) engine downsizing and fuel containing low-to-moderate amounts of alcohol, including ethanol and butanol. The researchers found that the combination of technologies allowed improvements in fuel economy over the engine drive cycle.

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Concept: Downsized and Supercharged Hybrid Pneumatic Engine for 30%+ Reduction in Fuel Consumption

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Schematic of downsized and supercharged four-stroke hybrid pneumatic spark injection engine. The reduction in fuel consumption is obtained mainly through enabling the effective use of a heavily downsized engine, rather than from regenerative efficiency. and is port fuel injected. Source: ETH Zürich. Click to enlarge.

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Ricardo to assist Lifan in development of 1.2L turbocharged DI gasoline engines for downsizing applications

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Ricardo will assist Lifan Automobile Group based in Chongqing, China, with the development of a family of highly downsized gasoline engines capable of meeting future Chinese and international fuel economy and emissions regulations.