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Unsteady Intermittent Spray Characteristics of PEI Gasoline Injector  

Kim Beomjun (Graduate of Mechanical Engineering, Chonbuk National University)
Lee Jaiho (Graduate of Mechanical Engineering, Chonbuk National University)
Cho Daejin (Graduate of Mechanical Engineering, Chonbuk National University)
Yoon Suckju (Department of Mechanical Engineering, Automobile Hi-technology Research Center, Chonbuk National University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.13, no.5, 2005 , pp. 64-74 More about this Journal
Abstract
The effect of fuel injection spray on engine performance has been known as one of the major concerns for improving fuel economy and reducing emissions. In general, reducing the spray droplet size could prevent HC emission in gasoline engine. As far as PFI gasoline engine is concerned, the mixture of air and fuel may not be uniform under a certain condition, because breakup and production of spray droplets are made in a short distance between the fuel injector and intake valve. This study, by constituting PFI gasoline spray system, was performed to study the transient spray characteristics and dynamic behavior of droplets from two-holes two-sprays type injector used in DOHC gasoline engine. Mean droplet size and optical concentration in accordance with various conditions were measured by LDPA and CCD camera. Through this study, the variation of drop size and optical concentration could be used for understanding the behavior of unsteady spray was declared and the existing the small droplets between each pulse spray could be estimated caused to the development of wall film was conformed.
Keywords
LDPA(Laser diffraction particle analyzer); Transient condition; Spray dynamic characteristics; PFI(Port fuel injection);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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