Application of a high-repetition-rate laser diagnostic system for single-cycle-resolved imaging in internal combustion engines.

High-repetition-rate laser-induced fluorescence measurements of fuel and OH concentrations in internal combustion engines are demonstrated. Series of as many as eight fluorescence images, with a temporal resolution ranging from 10 micros to 1 ms, are acquired within one engine cycle. A multiple-laser system in combination with a multiple-CCD camera is used for cycle-resolved imaging in spark-ignition, direct-injection stratified-charge, and homogeneous-charge compression-ignition engines. The recorded data reveal unique information on cycle-to-cycle variations in fuel transport and combustion. Moreover, the imaging system in combination with a scanning mirror is used to perform instantaneous three-dimensional fuel-concentration measurements.

[1]  M. Long,et al.  Instantaneous three-dimensional concentration measurements in turbulent jets and flames. , 1988, Optics Letters.

[2]  David P. Towers,et al.  A high-speed all-digital technique for cycle-resolved 2-D flow measurement and flow visualisation within SI engine cylinders , 1999 .

[3]  C F Kaminski,et al.  Nonlinear diffusion filtering of images obtained by planar laser-induced fluorescence spectroscopy. , 2000, Journal of the Optical Society of America. A, Optics, image science, and vision.

[4]  P. S. Wyckoff,et al.  On the Adequacy of Certain Experimental Observables as Measurements of Flame Burning Rate , 1998 .

[5]  Bryan J. Patrie,et al.  Instantaneous three-dimensional flow visualization by rapid acquisition of multiple planar flow images , 1994 .

[6]  C. Kaminski,et al.  High repetition rate planar laser induced fluorescence of OH in a turbulent non-premixed flame , 1999 .

[7]  Jürgen Wolfrum,et al.  Lasers in combustion: From basic theory to practical devices , 1998 .

[8]  D. E. Winterbone,et al.  Combustion in High-Speed Direct Injection Diesel Engines—A Comprehensive Study , 1994 .

[9]  D. Foster,et al.  Compression-Ignited Homogeneous Charge Combustion , 1983 .

[10]  A. Dreizler,et al.  Double-Pulse PLIF Imaging of Self-Ignition Centers in an SI Engine , 2001 .

[11]  M. Long,et al.  Time-Resolved Three-Dimensional Concentration Measurements in a Gas Jet , 1987, Science.

[12]  Hiromitsu Ando,et al.  Combustion Control Technologies for Direct Injection SI Engine , 1996 .

[13]  C. F. Hess,et al.  Application of quantitative two-line OH planar laser-induced fluorescence for temporally resolved planar thermometry in reacting flows. , 1994, Applied optics.

[14]  2 A Technique for Routine , Cycle-Resolved 2-D Flow Measurement and Visualisation within SI Engine Cylinders in an Engine Development Environment , 2022 .

[15]  C. Kaminski,et al.  Characterisation of a spark ignition system by planar laser-induced fluorescence of OH at high repetition rates and comparison with chemical kinetic calculations , 2000 .

[16]  Shinichi Goto,et al.  Spectroscopic Investigation of the Combustion Process in an LPG Lean-burn SI Engine , 1999 .

[17]  Clemens F. Kaminski,et al.  SPARK IGNITION OF TURBULENT METHANE/AIR MIXTURES REVEALED BY TIME-RESOLVED PLANAR LASER-INDUCED FLUORESCENCE AND DIRECT NUMERICAL SIMULATIONS , 2000 .

[18]  Clemens F. Kaminski,et al.  Quantitative three-dimensional imaging of soot volume fraction in turbulent non-premixed flames , 2002 .

[19]  Johannes Janicka,et al.  Laser-diagnostic and numerical study of strongly swirling natural gas flames , 1998 .

[20]  Frediano V. Bracco,et al.  Three-dimensional visualization of premixed-charge engine flames : islands of reactants and products, fractal dimensions, and homogeneity , 1988 .

[21]  Bengt Johansson,et al.  The Hcci Combustion Process in a Single Cycle-High-Speed Fuel Tracer Lif and Chemiluminescence Imaging , 2002 .

[22]  R. Maly,et al.  Investigation of flame structure and burning behaviour in an IC engine simulator by 2D-LIF of OH radicals , 1990 .

[23]  Werner Hentschel,et al.  Investigation of Spray Formation of DI Gasoline Hollow-Cone Injectors Inside a Pressure Chamber and a Glass Ring Engine by Multiple Optical Techniques , 1999 .

[24]  R. Hanson,et al.  Movies and 3-D images of flowfields using planar laser-induced fluorescence. , 1987, Applied optics.

[25]  Milan Sonka,et al.  Image Processing, Analysis and Machine Vision , 1993, Springer US.

[26]  K. Kang,et al.  Turbulence characteristics of tumble flow in a four-valve engine , 1998 .

[27]  R. H. Thring,et al.  Homogeneous-Charge Compression-Ignition (HCCI) Engines , 1989 .

[28]  Clemens F. Kaminski,et al.  Flame front tracking and simultaneous flow field visualization in turbulent combustion , 2000 .

[29]  Michael C. Drake,et al.  Advanced diagnostics for minimizing hydrocarbon emissions from a direct-injection gasoline engine , 1996 .

[30]  David L. Harrington,et al.  Automotive Spark-Ignited Direct-Injection Gasoline Engines , 2000 .