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

Green Car Congress

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.

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

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Use of a variable compression ratio (VCR) could be one technology approach to reducing fuel consumption in highly boosted (e.g., 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.

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Ford / AVL study concludes mid-level ethanol blend attractive as a long-term future fuel for use in optimized engines in US

Green Car Congress

Ford engineers also presented two other papers evaluating the effects of low to mid-level ethanol blends in spark-ignited engines at the conference. As a result, as the ethanol content of the fuel is increased, the fuel economy and driving range for a given fuel tank size are reduced. Downsizing/downspeeding.

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CPT/AVL Study: New Generation of Micro-Hybrid Technologies Can Enable More than 25% Reduction in Fuel Consumption at Lower Cost Than Full Hybrid Drive Systems

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Reductions in fuel consumption and CO 2 from base 2.0-liter liter ELC-Hybrid to downsized 1.4L VTES + SpeedStart. In combination with the VTES electric supercharger, this will create a cost effective micro/mild hybrid system which, when applied to a downsized 1.4-liter Click to enlarge. —Guy Morris. Guy Morris et al.

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Simulation study suggests ORC waste heat recovery system could deliver potential 7% improvement in fuel consumption in a PHEV on highway

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Their paper was presented at the ASME Internal Combustion Engine Division 2012 Fall Technical Conference by Marcello Canova, assistant professor at OSU; lead author was Philipp Skarke, from the University of Stuttgart Institute for Internal Combustion Engines and Automotive Engineering. The OSU EcoCAR PHEV powertrain. —Skarke et al.

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AVL Concept Turbohybrid Mild Hybrid System Approaches Full Hybrid Fuel Savings at Lower Cost; Improved Driveability

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Comparison of Fuel Consumption, Fun to Drive and System Cost of the different powertrain concepts. Downsizing a gasoline engine (e.g., with the use of turbocharged GDI) and downspeeding can result in a significant increase in fuel efficiency, but with a negative impact on traction force reserve and driveability. Fischer et al.

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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

Green Car Congress

Tom Cackette, Chief Deputy Executive Office of the California Air Resources Board, spent the bulk of his talk during the opening panel discussing the response to climate change, which he called “ the defining environmental challenge of this century. Differentiated Analysis of Downsizing Concepts”). SULEV/Tier 2 Bin 2 is the target.

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