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CMU study shows autonomous vehicle algorithms can have considerable effect on fuel economy; need for new approaches in testing

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Autonomous vehicle driving behavior can have a considerable effect on fuel economy. However, the study also showed that autonomous vehicle (AV) technology following algorithms designed without considering efficiency can degrade fuel economy by up to 3%.

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NREL report on electric bus demo at Foothill Transit finds Proterra fuel economy >8x higher than CNG on same line

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The CNG buses had an average fuel economy of 3.89 However, because Foothill Transit operates its BEB and CNG bus fleets differently, the efficiency results presented are not an apples-to-apples comparison. mpgge, equating to 4.34

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Toyota implements Atkinson cycle in non-hybrid ESTEC engine; up to 38% thermal efficiency and improved fuel economy

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The result of their work, presented in papers this spring at the SAE 2014 World Congress, the Vienna Motor Symposium, and the JSAE Annual Congress, is the new 1.3-liter liter ESTEC (Economy with Superior Thermal Efficient Combustion) in-line 4-cylinder Gasoline Engine (1NR-FKE). —Yamada et al. Trend of engine efficiency.

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BorgWarner suggests Valve-Event Modulated Boost system can offer 6-17% fuel economy benefit over already downsized and turbocharged engines

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Christopher Thomas, BorgWarner VP, Advanced Engineering, Engine Group and VP, Advanced Engineering, Drivetrain Group presented the basic concepts of VEMB and current BorgWarner test results at the recent SAE 2012 High Efficiency IC Engine Symposium. Source: Borgwarner. Click to enlarge. The turbo will always be spinning.

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GM investigating ultracap-based Active Energy Recovery Buffer as low-cost mechanism to improve conventional vehicle fuel economy

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GM is exploring the use of an ultracapacitor-based Active Energy Recovery Buffer (AERB) scheme as a low-cost means to improve fuel economy in conventional vehicles; results of a simulation study presented at SAE 2011 World Congress showed improvement of up to 1.3% liter engine and a six-speed transmission.

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Daimler Trucks NA presents new Class 8 Freightliner Cascadia with fuel efficiency improved up to 8%

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Daimler Trucks North America (DTNA) has presented its new heavy-duty truck flagship: the new Freightliner Cascadia. When developing the new Cascadia, the engineers set a priority goal of achieving significant fuel savings. are available in the new Cascadia to further promote downspeeding and thus improved fuel economy.

Detroit 150
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ORNL study finds even low penetration of CAVs delivers significant fuel economy benefits, but increases travel time slightly

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A new study by a team at Oak Ridge National Laboratory (ORNL) suggests that low penetration rates of connected and automated vehicles (CAVs) can deliver significant fuel consumption benefits, but that the total travel time increases slightly. Fuel consumption (top) and travel time (bottom) for different penetration rates of CAVs.