University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Ignition timing sensitivities of oxygenated biofuels compared to gasoline in a direct-injection SI engine

Daniel, R, Tian, G, Xu, H and Shuai, S (2012) Ignition timing sensitivities of oxygenated biofuels compared to gasoline in a direct-injection SI engine Fuel, 99. pp. 72-82.

Full text not available from this repository.


Global concerns over atmospheric carbon dioxide (CO 2) levels and the security of fossil fuel supply have led to the development of biofuels; a potentially carbon-neutral and renewable fuel strategy. One new gasoline-alternative biofuel candidate is 2,5-dimethylfuran (DMF). In this paper, the potential of DMF is examined in a direct-injection spark-ignition (DISI) engine. Focus is given to the combustion performance and emissions sensitivity around the optimum spark timing, especially at 10 crank angle degrees retard (SR10). Such spark retard strategies are commonly used to reduce catalyst light-off times, albeit at the cost of reduced engine performance and increased CO 2. The results for DMF are compared to gasoline, ethanol, butanol and methanol so that its sensitivity can be positioned relatively. The overall order of spark sensitivity at the highest load (8.5 bar IMEP) was: gasoline > butanol > DMF > ethanol > methanol. The four biofuels widen the spark window due to improved anti-knock qualities and sometimes increased charge-cooling. This allows the increase of CO 2 to be better minimized than with gasoline. Furthermore, DMF is the only biofuel to produce high exhaust gas temperatures, similar to gasoline and helpful for fast catalyst light-off, whilst maintaining high combustion stabilities. This demonstrates the potentially favorable characteristics of DMF to become an effective cold-start fuel. © 2012 Elsevier Ltd. All rights reserved.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Daniel, R
Xu, H
Shuai, S
Date : 1 September 2012
DOI : 10.1016/j.fuel.2012.01.053
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:39
Last Modified : 25 Jan 2020 00:14

Actions (login required)

View Item View Item


Downloads per month over past year

Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800