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Downspeeding and supercharging with transmission optimization can deliver fuel economy improvement over downspeeding and turbocharging

Green Car Congress

Researchers from Southwest Research Institute (SwRI) and Eaton have demonstrated the application of downspeeding and supercharging a diesel vehicle, in conjunction with optimizing transmission gear ratios and the shift schedule, to deliver a greater improvement in fuel economy than a downsped and turbocharged configuration.

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Co-Optima releases capstone report on first 4 years of work

Green Car Congress

Co-Optima estimations indicate that significant fuel economy improvements are possible with improvements to RON, S, and HOV. compression ratio, extent of downsizing, etc.). Estimations indicate that fuel economy improvements are possible with improvements to RON, S, and HOV. Source: Co-Optima capstone report.

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CPT developing 48-volt electric supercharger for micro-mild hybrids

Green Car Congress

At 48 volts, a VTES electric supercharger will transform 7kW of battery power into a highly boosted charge of air for downsized gasoline and diesel engines. There will be no torque deficit or other tradeoffs from essential engine downsizing and higher gearing, which now dominates the development of internal combustion engines.

Volt 207
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Former Commerce and Transportation Secretary Norman Mineta urges technology neutral policies in reaching proposed CAFE standards

Green Car Congress

Current fuel economy policy clearly demonstrates this fact. —“The Case for Technology Neutral Public Policy in Fuel Economy Debate”. From a “well-to-wheel” perspective, high efficient gasoline and diesel engines are nearly as energy efficient as any technology available.

Standards 247
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Update on Nissan’s new front-engine, front-wheel drive hybrid system

Green Car Congress

There are four elements when in place that Nissan thinks will encourage wider market adoption of hybrids, Thunes said: affordable cost; meaningful fuel economy gains; a rational evolution from conventional powertrains to hybrid powertrains; and preserving cabin space and cargo area. Overall fuel economy is improved in a wide range.

Engine 220
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Torotrak and Rotrex Establish Joint Venture to Speed Introduction of Variable Drive Compressor Technology for Boosting

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The new venture, which will be called “Rotrak”, will add Torotrak’s variable speed traction drive to Rotrex’ supercharging technology to address the automotive industry’s need for affordable, effective engine downsizing technologies. Torotrak CEO Dick Elsy. million units per year to 12 million by 2016. million to 16.1

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SAE High Efficiency IC Engine Symposium opens with consideration of alternative engine designs

Green Car Congress

An increase in pumping requirements for any reason carries a fuel economy penalty. Scuderi explained that “Millerizing” the Scuderi split cycle means downsizing the compression cylinder to get the over-expansion technique that is the core of the Miller approach—achieved in a convention engine by using early or late valve closing.

Engine 294