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Crank-angle resolved imaging of biacetyl laser-induced fluorescence in an optical internal combustion engine

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Abstract

The use of a frequency-tripled, diode-pumped Nd:YAG laser in combination with a CMOS camera lens-coupled to a three-stage image intensifier allowed the visualization of the fuel distribution with crank angle resolution for hundreds of consecutive engine cycles. Biacetyl, doped into iso-octane, was excited at rates of 12 kHz with 100 ns pulses. Pulse energies are high enough to allow single-pulse imaging of the vapor-phase fuel distribution for motored and fired operation in an optical engine. The repetition rate of the setup is adequate to resolve critical steps in the development of the fuel cloud around the spark plug of a direct-injection gasoline engine.

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Authors and Affiliations

  1. Department of Mechanical Engineering, The University of Michigan, 2026 W.E. Lay Automotive Laboratory, 1231 Beal Ave., Ann Arbor, MI, 48109-2133, USA

    J.D. Smith & V. Sick

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  1. J.D. Smith
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  2. V. Sick
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Correspondence to J.D. Smith.

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PACS

42.62.Fi; 33.50.Dq; 82.33.Vx

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Smith, J., Sick, V. Crank-angle resolved imaging of biacetyl laser-induced fluorescence in an optical internal combustion engine. Appl. Phys. B 81, 579–584 (2005). https://doi.org/10.1007/s00340-005-1947-6

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  • DOI: https://doi.org/10.1007/s00340-005-1947-6

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