Wall Adhesion Characteristics of Fuel Spray under Flow Conditions in Intake Port Fuel Injection Spark Ignition Engines

DOI

Bibliographic Information

Other Title
  • 吸気管内燃料噴射式火花点火機関を想定した流動条件下における燃料噴霧の壁面付着特性
  • - Effect of Fuel Injection in Multi-Cycle on Liquid Film Formation -
  • - マルチサイクルでの燃料噴射が液膜形成に与える影響 -

Abstract

Port Fuel Injection (PFI) system in hybrid gasoline engines is frequently in cold condition due to use for electricity generation. Under cold condition, the fuel film forms on the intake port wall does not evaporate completely during the cycle, and the injected fuel spray impinges on it in the next cycle. In this paper, the process of fuel film formation under multi-cycle fuel injection condition is analysed by applying the Total Internal Reflection Laser Induced Fluorescence method. In addition, the particle size distribution of spray droplets was measured in quiescent conditions with Super High Spatial Resolution Photographymethod, which allows for whole spray imaging while maintaining the spatial resolution of small droplets. As a result, the fuel adhesion mass per injection increases as the critical Weber number increases with repeated fuel injections under quiescent conditions. Under cross flow conditions, fuel mass impinging on the wall is much smaller than under quiescent conditions. Accordingly, the fuel adhesion mass per injection is almost constant with repeated fuel injections because of the small increase in the critical Weber number.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390580394707774208
  • DOI
    10.11351/jsaeronbun.55.113
  • ISSN
    18830811
    02878321
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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