Study on auto-ignition characteristics of ethanol and ETBE blended fuels in a gasoline HCCI engine

Takashi Kaminaga, Takashi Youso, Masahisa Yamakawa, Satoshi Ito, Akira Hozumi, Jin Kusaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Bio-fuels such as ethanol (EtOH) and ethyl tert-butyl ether (ETBE) are used as blending components in gasoline for carbon neutralization. These oxygenates are also recognized as high octane number fuels, which are acceptable for spark ignition (SI) combustion, as they inhibit end-gas auto-ignition (partly leading to knocking). However, for homogeneous charge compression ignition (HCCI) combustion, excess delay in ignition timing may occur as an undesirable effect, leading to misfiring or incomplete combustion. In this work, knocking phenomenon and HCCI combustion characteristics of ethanol and ETBE blended gasoline fuels with same octane numbers have been experimentally studied. Chemical reaction simulations were also conducted for further understanding. Experimental work was performed in a single cylinder gasoline engine with compression ratio set to 14.0. Intake air was heated at HCCI combustion operation. SI combustion test results show that when the same octane number fuels are used, ethanol and ETBE have no effect on knocking limit. On the other hand, HCCI combustion results indicate that ethanol retards ignition timing at low intake temperature condition, whereas ignition advancement is observed at high intake temperature condition. ETBE acted as an ignition accelerator for all intake temperatures. Based on these results, an empirical equation is proposed for HCCI timing prediction of the tested blended fuels.

Original languageEnglish
Title of host publicationProceedings of the 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012
Pages416-421
Number of pages6
Publication statusPublished - 2012
Event8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012 - Fukuoka
Duration: 2012 Jul 232012 Jul 26

Other

Other8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012
CityFukuoka
Period12/7/2312/7/26

Fingerprint

Ethanol
Ignition
Gasoline
Ethers
Engine
Compression
Charge
Engines
Combustion
Antiknock rating
Timing
Electric sparks
Compression ratio (machinery)
Air intakes
Engine cylinders
Accelerator
Chemical Reaction
Temperature
Particle accelerators
Excess

Keywords

  • ETBE
  • Ethanol
  • Fuel components
  • Gasoline engine
  • HCCI
  • Knocking

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Modelling and Simulation

Cite this

Kaminaga, T., Youso, T., Yamakawa, M., Ito, S., Hozumi, A., & Kusaka, J. (2012). Study on auto-ignition characteristics of ethanol and ETBE blended fuels in a gasoline HCCI engine. In Proceedings of the 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012 (pp. 416-421)

Study on auto-ignition characteristics of ethanol and ETBE blended fuels in a gasoline HCCI engine. / Kaminaga, Takashi; Youso, Takashi; Yamakawa, Masahisa; Ito, Satoshi; Hozumi, Akira; Kusaka, Jin.

Proceedings of the 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012. 2012. p. 416-421.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kaminaga, T, Youso, T, Yamakawa, M, Ito, S, Hozumi, A & Kusaka, J 2012, Study on auto-ignition characteristics of ethanol and ETBE blended fuels in a gasoline HCCI engine. in Proceedings of the 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012. pp. 416-421, 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012, Fukuoka, 12/7/23.
Kaminaga T, Youso T, Yamakawa M, Ito S, Hozumi A, Kusaka J. Study on auto-ignition characteristics of ethanol and ETBE blended fuels in a gasoline HCCI engine. In Proceedings of the 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012. 2012. p. 416-421
Kaminaga, Takashi ; Youso, Takashi ; Yamakawa, Masahisa ; Ito, Satoshi ; Hozumi, Akira ; Kusaka, Jin. / Study on auto-ignition characteristics of ethanol and ETBE blended fuels in a gasoline HCCI engine. Proceedings of the 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012. 2012. pp. 416-421
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AB - Bio-fuels such as ethanol (EtOH) and ethyl tert-butyl ether (ETBE) are used as blending components in gasoline for carbon neutralization. These oxygenates are also recognized as high octane number fuels, which are acceptable for spark ignition (SI) combustion, as they inhibit end-gas auto-ignition (partly leading to knocking). However, for homogeneous charge compression ignition (HCCI) combustion, excess delay in ignition timing may occur as an undesirable effect, leading to misfiring or incomplete combustion. In this work, knocking phenomenon and HCCI combustion characteristics of ethanol and ETBE blended gasoline fuels with same octane numbers have been experimentally studied. Chemical reaction simulations were also conducted for further understanding. Experimental work was performed in a single cylinder gasoline engine with compression ratio set to 14.0. Intake air was heated at HCCI combustion operation. SI combustion test results show that when the same octane number fuels are used, ethanol and ETBE have no effect on knocking limit. On the other hand, HCCI combustion results indicate that ethanol retards ignition timing at low intake temperature condition, whereas ignition advancement is observed at high intake temperature condition. ETBE acted as an ignition accelerator for all intake temperatures. Based on these results, an empirical equation is proposed for HCCI timing prediction of the tested blended fuels.

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