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Torotrak to present extreme engine downsizing solution at Dresden supercharging conference

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In comparison with the incumbent fixed-ratio positive-displacement supercharger on a 1.0L In comparison with the incumbent fixed-ratio positive-displacement supercharger on a 1.0L V-Charge system with mechanical variable drive outperforms conventional boosting methods on downsized gasoline engine. 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. A Study of Gasoline-Alcohol Blended Fuels in an Advanced Turbocharged DISI Engine. ( Cairns et al. SAE 2009-01-0138).

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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 liter TSI with gasoline direct injection plus turbo- and supercharging. By comparison, its direct predecessor with regard to power—equipped with a 132 kW 1.8-liter The new Volkswagen Polo GTI. Click to enlarge.

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JAC and Ricardo develop production version of HyBoost concept; seeking 30% boost in fuel economy with same performance

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The Ricardo HyBoost concept is based on a downsized, highly boosted turbocharged direct injection gasoline (TDGI) engine giving improved fuel economy at low cost, linked to a 48V electrical architecture including a belt starter generator (BSG), DC-DC converter and a lithium-ion battery for energy storage.

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FEV’s two-stage VCR system; 5-7% increase in fuel economy using variable length conrods

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downsized, turbocharged) gasoline engine, as operating an engine with higher compression ratios at low load can increase fuel economy compared to operating an engine with fixed compression ratio. In comparison, naturally aspirated engines have a higher compression ratio in the order of 1 to 1.5 Click to enlarge. Kleeberg, H.,

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Advanced Turbocharged, Direct Injected Gasoline Engines Poised to Take on Diesels in US and in Europe for Reduced Fuel Consumption and Emissions

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Comparison of Emission Standards (g/mi). . Cackette was in effect suggesting that the future tailpipe emissions baseline (LEV III) for light duty passenger vehicles—both diesel and gasoline—was likely to be or to approximate CA SULEV/US Tier 2 Bin 2. Current 50-state baseline Projected future baseline. CA LEV US T2B2 CA SULEV.

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ICCT working paper highlights benefits of current and emerging light-duty diesel technology; “promising pathway for compliance”

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The ICCT team—John German and Aaron Isenstadt—concluded that diesels have and will retain two significant advantages over gasoline engines: significantly better fuel economy and cargo hauling and towing ability. Diesels offer a promising pathway for compliance and another option in manufacturers’ toolboxes. ”. Click to enlarge.

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