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

Johan Hult, Mattias Richter, Jenny Nygren, Marcus Aldén, Anders Hultqvist, Magnus Christensen, Bengt Johansson

Research output: Contribution to journalArticlepeer-review

72 Scopus citations


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 μs 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, directinjection 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 threedimensional fuel-concentration measurements.

Original languageEnglish (US)
Pages (from-to)5002-5014
Number of pages13
JournalApplied Optics
Issue number24
StatePublished - Aug 20 2002

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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