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Study finds highly-turbocharged alcohol-fueled DISI engines could be more efficient than diesels

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Highly turbocharged alcohol-fueled direct-injection spark-ignition (DISI) engines operated at a high compression ratio could be as or more efficient than diesel engines while also providing advantages of lower vehicle cost, lower emissions and higher power, according to a recent modeling study by Leslie Bromberg and Daniel Cohn at MIT.

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Audi using supplementary port fuel injection to address particulates from gasoline direct injection

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In part-load operation, the indirect injection supplements direct gasoline injection to improve fuel economy and to reduce the output of particulates from the engine. GDI technology provides fuel efficiency benefits from charge air cooling, more facile turbocharging, and the downsizing that these permit. Earlier post.). Earlier post.)

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Delphi Powertrain Study Concludes 3-Cylinder Turbo Gasoline Direct Injection Engine Offers a High-Value NOx and CO2 Solution for Cost-Sensitive Vehicle Segments

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CO 2 reduction potential vs. OEM On-cost for turbocharged GDi and turbo-Diesel technologies to meet Euro 6 standards. The Delphi study assessed the technology of downsizing and turbocharging; GDI fueling and its synergies with turbocharging; and an analysis of downsized 3-cylinder versus 4-cylinder engines.

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ADEPT project to apply gasoline engine HyBoost system to diesel; 48V architecture; full hybrid fuel economy at much lower cost

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The Ricardo-led Advanced Diesel Electric Powertrain (ADEPT) project will apply 48V “intelligent electrification” concepts, mild hybridization and waste heat recovery in a Ford Focus diesel demonstrator. In 2011, the HyBoost team reported that the HyBoost demonstrator was achieving comparable performance to the conventional 2.0L

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Mazdas new SKYACTIV gasoline and diesel engines are steps on the road to its Ideal Engine; focus on compression ratio

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However, while Mazda plans to offer hybrid vehicles in the medium-term, its engineers are pushing hard to increase the efficiencies of both the gasoline and diesel platforms, moving toward what they call “the ideal Internal Combustion Engine.” Extreme compression ratio rather than downsizing.

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Ford E85 Direct Injection Boosting Study: A Less Expensive Alternative to Diesel

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The resulting higher BMEP levels allow downsizing of the engine at equivalent vehicle performance. EBS has a collaborative R&D agreement with Ford, and participated in the study reported at the World Congress. In the study, Ford applied the E85 boosting approach to two engines: an early prototype 3.5-liter Earlier post.)

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PSA to commercialize SwRI-developed Dedicated-EGR technology in high-efficiency gasoline engines by 2018

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During its recent Innovation Day presentations ( earlier post ), PSA Peugeot Citroën announced that it will commercialize high-efficiency gasoline engines featuring dedicated exhaust gas recirculation (D-EGR), derived from a collaborative program with SwRI in the US. Source: SwRI, DEER 2012. Click to enlarge.

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