Fuel Distribution in an Air Assist Direct Injected Spark Ignition Engine with Central Injection and Spark Plug Measured with Laser Induced Fluorescence

Ekenberg, Martin; Johansson, Bengt

doi:10.4271/2000-01-1898

Cited by 8 publications

(2 citation statements)

References 3 publications

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“…The resulting findings were subsequently verified using laser measuring methods such as Particle Image Velocimetry (PIV), Planar Laser Induced Fluorescence (PLIF) [1][2][3][4] and MIE-scattering light (MIE) and by conducting flow field simulations using CFD. Therefore, basic thermodynamic studies had to be conducted first.…”

Section: Introductionmentioning

confidence: 94%

The inflammation behaviour of a DI gasoline engine

Pischinger¹,

Geiger²,

Ballauf³

et al. 2002

MTZ Worldw

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Section: Introductionmentioning

confidence: 94%

The inflammation behaviour of a DI gasoline engine

Pischinger¹,

Geiger²,

Ballauf³

et al. 2002

MTZ Worldw

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“…The injection sequence and injection pulse width of the two injectors are controlled by an electronic control unit (ECU). The low injection pressure and flexible control strategy not only reduce the cost of the AAFI system but also improve its safety [15,16]. Therefore, the AAFI system can be integrated into the spark ignition aviation piston engine to achieve high-quality atomization of heavy fuels.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Effects of Injection Parameters on the Air-Assisted Diesel Spray Characteristics

Zhao

2022

International Journal of Aerospace Engineering

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The air-assisted fuel injection (AAFI) system may be installed in the spark ignition aviation piston engine for the atomization of heavy fuels. However, studies on the effects of injection parameters on the spray characteristics are insufficient, which affects the improvement of AAFI engine performance. In this study, air-assisted diesel spray characteristics are investigated experimentally using a high-speed backlit imaging technique. The effects of main air-assisted injection control parameters such as fuel injection pressure, fuel temperature, and fuel injection duration on the spray characteristics are examined. The results show that spray shape changes from “spindle” to “cone” with an increase in fuel injection pressure. As the fuel injection pressure increases to 1.0 MPa, both the spray penetration and spray width increase significantly. “Protrusions” appear on the spray edge at high fuel temperatures. When the fuel temperature drops to 268 K, the spray penetration and spray width increase slightly. The spray shrinks significantly in both the axial and radial directions with an increase in fuel injection duration. Key parameters that directly affect air-assisted spray characteristics include the difference between the fuel-air mixture injection pressure and the ambient pressure, the density of fuel-air mixture in the air-assisted injector premixed chamber, and the kinetic energy density of the fuel. The former two parameters affect the spray penetration while the latter affects the spray width. The study is beneficial for the design of AAFI engines.

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