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Effects of combustion phasing, injection timing, relative air-fuel ratio and variable valve timing on SI engine performance and emissions using 2,5-dimethylfuran

Daniel, R, Wang, C, Xu, H and Tian, G (2012) Effects of combustion phasing, injection timing, relative air-fuel ratio and variable valve timing on SI engine performance and emissions using 2,5-dimethylfuran

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Abstract

Ethanol has long been regarded as the optimal gasoline-alternative biofuel for spark-ignition (SI) engines. It is used widely in Latin and North America and is increasingly accepted as an attractive option across Europe. Nevertheless, its low energy density requires a high rate of manufacture; in areas which are deficient of arable land, such rates might prove problematic. Therefore, fuels with higher calorific values, such as butanol or 2,5-dimethylfuran (DMF) deserve consideration; a similar yield to ethanol, in theory, would require much less land. This report addresses the suitability of DMF, to meet the needs as a biofuel substitute for gasoline in SI engines, using ethanol as the biofuel benchmark. Specific attention is given to the sensitivity of DMF to various engine control parameters: combustion phasing (ignition timing), injection timing, relative air-fuel ratio and valve timing (intake and exhaust). Focus is given to the window for optimization; the parameter range which sustains optimal IMEP (within 2%) but provides the largest reduction of emissions (HC or NOx). The test results using a single cylinder SI research engine at 1500rpm show how DMF is less sensitive to key engine parameters, compared to gasoline. This allows a wider window for emissions optimization because the IMEP remains optimal across a greater parameter range. Copyright © 2012 SAE International.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Authors :
NameEmailORCID
Daniel, RUNSPECIFIEDUNSPECIFIED
Wang, CUNSPECIFIEDUNSPECIFIED
Xu, HUNSPECIFIEDUNSPECIFIED
Tian, Gg.tian@surrey.ac.ukUNSPECIFIED
Date : 10 September 2012
Identification Number : 10.4271/2012-01-1285
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:39
Last Modified : 17 May 2017 15:12
URI: http://epubs.surrey.ac.uk/id/eprint/840008

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