Influence of Gasoline Components on Engine Efficiency and Emissions

Abstract

Re´sume´-L'influence des composants de l'essence sur l'efficacite´et les e´missions du moteur -Pour les de´cennies a`venir, il est pre´vu que les combustibles fossiles et les biocarburants utilise´s dans les moteurs a`combustion interne restent la principale source de propulsion des ve´hicules, ce qui justifie la recherche intense dans le monde entier et les efforts de de´veloppement pour re´pondre aux enjeux d'une efficacite´croissante et de la re´duction des e´missions. La mode´lisation des combustibles commerciaux et les processus de combustion des moteurs pre´sentent de grands de´fis. Il est e´galement impe´ratif de mieux comprendre comment les diffe´rents composants de carburant interagissent et interviennent sur la combustion du moteur et ses parame`tres de performance. Dans le travail pre´sente´, des compose´s repre´sentatifs ont e´te´utilise´s afin d'appliquer des me´thodologies et d'e´valuer l'influence des composants du carburant sur ses proprie´te´s et sur la combustion du moteur, ainsi que sur les parame`tres de performance. Une attention toute particulie`re est accorde´e à l'efficacite´du moteur et au comportement des e´missions, de meˆme qu'a`leurs corre´lations par rapport aux proprie´te´s du carburant et ad 'autres parame`tres de performance du moteur. Les potentiels de chaque composant et le groupe chimique y affe´rent ont e´te´identifie´s pour diffe´rentes de´finitions techniques moteurs. Les re´sultats combinent des informations et des me´thodologies qui peuvent eˆtre utilise´es pour de´velopper des carburants destine´s a`diffe´rentes applications.Abstract -Influence of Gasoline Components on Engine Efficiency and Emissions -For the next few decades, it is expected that fossil fuels and bio-fuels used in internal combustion engines will remain the primary source for vehicular propulsion. This justifies the intense worldwide research and development effort to comply with the challenges of increasing efficiency and reducing internal combustion engine emissions. The modeling of commercial fuels and engine combustion processes presents great challenges. There is also the need to better understand how different fuel components interact and influence engine combustion and performance parameters. In the present work, This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Oil & Gas Science and Technology -Rev. IFP Energies nouvelles (2016) 71, 12 Ó G.B. Machado et al., published by IFP Energies nouvelles, 2014 DOI: 10.2516 surrogate fuels were used to implement methodologies to evaluate the influence of fuel components on fuel properties and multiple engine combustion and performance parameters. Special attention is given to engine efficiency and emissions behavior and their correlations to fuel properties and others performance parameters of the engine. The potentials of each component ...

Experimental comparison of combustion and emission characteristics between a market gasoline and its surrogate

“…While for diesel [3][4][5][6] and jet petroleum fuels [7,8], the selection of surrogate components is diverse, the surrogates for gasoline fuels are mostly based on the so-called primary reference fuel (PRF) mixtures [9][10][11] of n-heptane and iso-octane, which are the two components used as reference fuels in octane number engine tests. To account for the content of aromatic compounds, toluene is often added (TRF -toluene reference fuel), as well as ethanol to consider its common presence in market gasoline fuels [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. This four-component surrogate model with tailored blending ratios has been widely applied in numerical studies and shown to satisfactorily emulate the real gasoline fuel in CFD simulations for certain targets.…”

Flex-fuel engine: Influence of ethanol content on power and efficiencies

“…Machado et al 9 investigated the individual influence of each chemical component (iso-octane, toluene and n-heptane) on engine torque, fuel consumption, combustion and overall efficiencies, as well as on the emissions of pollutants.…”

Comparative Effects of Olefin Content on the Performance and Emissions of a Modern GDI Engine

“…Gasoline, as the main fuel for gasoline cars, contains different kinds of straight-chain paraffins, isoparaffins, cycloparaffins, aromatics, olefins, and components with oxygen. − Hence, many studies have focused on the effects of gasoline components on the performance and emissions of gasoline engines in recent decades. Based on the tests over a wide range of engine operating conditions (various speeds and throttle positions), Machado et al found that n -heptane improved the combustion efficiency and overall efficiency of engines, while reducing carbon monoxide (CO) and total hydrocarbon (THC) emissions, without significantly increasing carbon dioxide (CO 2 ) emissions. Moreover, toluene and isooctane were beneficial for improving engine performance, reducing CO 2 and CO specific emissions for engines with high compression ratios.…”