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Researchers propose evaluating alt fuel efficiency based on energy rather than volume; impact of ethanol on vehicle efficiency and GHGs

Green Car Congress

This is because the ethanol component may affect the conversion efficiency of the gasoline component in a blend, that is, make an engine more or less efficient in its use of the gasoline component. converted all vehicle efficiency measurements into vehicle energy efficiency (VEE, km/MJ) based on fuel energy densities reported in each study.

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Brunel engineers optimizing CAI combustion in 2-stroke camless gasoline DI engine

Green Car Congress

As part of a consortium over the last several years, the authors worked with industrial partners in developing 2/4-stroke switchable engine technologies through engine downsizing, from which the current research on 2-stroke CAI via poppet valve operation have been initiated and performed. bar IMEP on the 2-stroke mode. Zhang et al.

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Lotus Omnivore Engine Shows Up To 10% Better Fuel Economy Than Spray-Guided GDI Engines; Achieves HCCI At Extremely Light Loads

Green Car Congress

At 2000 rpm and up to approximately 2.7 The automotive industry, including Lotus Engineering, has quite rightly advocated engine downsizing for four-stroke engines. The two-stroke cycle, conversely, does not suffer from significant throttling losses and in many ways is a more natural fit for automotive use.

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Developing Fords EcoBoost Combustion System

Green Car Congress

Ford’s turbocharged, gasoline direct injection EcoBoost engines are targeted to play a significant near-term role in Ford’s efforts to reduce fuel consumption by enabling downsizing. The cold-start period constitutes the majority of engine emissions due to zero or low conversion efficiency of the aftertreatment system. Earlier post.).

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