Investigation of Spray Characteristics by Increasing Fuel Injection Pressure for Gasoline Direct Injection Nozzle at High Temperature and High Pressure Ambient

高温高圧雰囲気場におけるガソリン直噴インジェクタノズルの噴霧特性解析

In order to reduce particulate matter emitted from gasoline direct injection spark ignition engine, it is important to reduce the fuel film deposition on the wall and local rich air-fuel mixture formation. As a means to reduce these, the high pressure fuel injection is considered to be effective. In this study, the authors evaluated the influence of increasing fuel injection pressure to the spray behavior under the high-temperature and high-pressure ambient assuming the practical combustion chamber in engines. The air entrainment flow velocity into the spray was measured by using consecutive Particle Tracking Velocimetry (PTV) method with a high-speed camera and a high-frequency Nd:YAG laser. And, fuel vapor phase was measured by using Laser Induced Exciplex Fluorescence (LIEF) method with a constant volume vessel. The air entrainment flow velocity into the spray was increased with time after injection, and it became fast by increasing the pressure. The area of fuel film deposition was decreased, and the rate of the film vaporization was increased. The height of vapor phase around the spray tip rose by increasing the fuel pressure.ガソリン直噴エンジンの排気PM エミッション低減に向けて,本研究では燃料の高圧噴射化によるPM 低減の可能性について研究している.本報では,高圧雰囲気場における噴霧特性について評価した.

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  • English
  • Japanese

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  • Accession Number: 01673411
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: May 15 2018 3:03PM