An experimental investigation of multihole gasoline direct injection sprays at high injection pressures in a quiescent test chamber is carried out. High-speed Mie-scattering and high-speed Schlieren visualisations are used to characterise vapour penetration, liquid penetration, spray angle and velocity under typical engine high load and low load conditions. Variations of chamber conditions are also investigated in order to assess the effects of chamber temperature, density and pressure on the spray characteristics. The important chamber parameters are identified which affect the performance of multihole injectors in spark ignition engines.
Experimental characterization of high pressure gasoline direct injection sprays
Experimental characterization of high pressure gasoline direct injection sprays | SpringerLink
Invalid Name. Invalid Email. Invalid contact no. Invalid Security Code. Gasoline direct injection system is an advanced and effective fuel injection technology, which offers many advantages as compared to other gasoline fuel injection technologies with regards to efficiency and specific power.
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Maximum fuel injection pressures for GDI engines is expected to increase due to positive effects on emissions and engine-efficiency. Current GDI injectors have maximum operating pressures of 35 MPa, but higher injection pressures have yielded promising reductions in particle number PN and improved combustion stability. However, the mechanisms responsible for these effects are poorly understood, and there have been few studies on fuel sprays formed at high injection pressures. This paper summarizes experimental studies on the properties of sprays formed at high injection pressures.
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