Engine Thermal Efficiency Gain and Well-to-Wheel Greenhouse Gas Savings When Using Bioethanol as a Gasoline-Blending Component in Future Spark-Ignition Engines: A China Case Study

Abstract

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Multiobjective component sizing of a hybrid ethanol-electric vehicle propulsion system

“…The ethanol-gasoline blend model can be applied for up to 70 vol. % ethanol blends [18]. However, the blend whose ethanol content is beyond 25 vol.…”

“…An accurate ethanol-gasoline blend model is vitally important because a precise knowledge of ethanol blends and their influencing factors can be instrumental in the implementation of component sizing and energy management. The authors, in our recently published articles [18], [19], have proposed an empirical ethanol-gasoline blend model based on historical and literature data to evaluated statistical benefits of ethanol use on the engine thermal efficiency gains and WTW GHG emissions. Table 1 lists the main properties of typical gasoline and ethanol used in automotive applications.…”

“…where 0 , 1 , 2 , 3 , and 4 are coefficients derived from the engine tests using ethanol blends, more details are available in [18]; ∆ and ∆ are differences between ethanol and gasoline, in terms of research octane number and octane sensitivity, respectively, as expressed below.…”

“…Among them, ethanol-gasoline blends have attracted considerable attention from both scholars and the wider community [17]. For example, Wang et al, in their recently published articles [18], [19], have demonstrated clear benefits of ethanol addition for the enhancement of engine Multiobjective component sizing of a hybrid ethanol-electric vehicle propulsion system efficiency and the reduction of emissions. Furthermore, Samaras et al [20] have stressed that the reduced liquid fuel requirements of PHEVs could utilize limited ethanol resources, without threat to food security.…”

The Effect of Pure Oxygenated Biofuels on Efficiency and Emissions in a Gasoline Optimised DISI Engine

“…The impact of transportation on climate change has caused both global and national incentives to increase the amount of renewable fuels used in internal combustion engines (ICEs) [1][2][3][4][5][6][7]. Liquid biofuels show advantages compared to gaseous alternatives as they exhibit higher energy density and are compatible with current infrastructure [7][8][9].…”