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http://dx.doi.org/10.3795/KSME-B.2005.29.12.1360

Fuel Evaporation Characteristics of a Port Injection Type Motorcycle Engine with Changing Fuel Spray Timing  

Lee Kihyung (한양대학교 기계공학과)
Kang Inbo (한양대학교 대학원 기계공학과)
Kim Hyungmin (한양대학교 대학원 기계공학과)
Baik Seungkook (케피코(주) 기술연구소)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.29, no.12, 2005 , pp. 1360-1368 More about this Journal
Abstract
This study investigates the characteristics of spray, such as evaporation rate and spray trajectory, for a 4-hole injector which is applied to a 4-valve motorcycle gasoline engine. Three dimensional, unsteady, compressible flow and spray within the intake-port and cylinder have been simulated using the VECTIS code. Spray characteristics were investigated at 6000 rpm engine speed. Furthermore, we visualized fuel behavior in the intake-port using a CCD camera synchronized with a stroboscope in order to compare with the analytical results. Boundary and intial conditions were employed by complete 1-D simulation of the engine using the WAVE code. Fuel was injected into the intake-port at two time intervals relative to the position of the intake valves so that the spray arrived when the valves were closed and fully open. The results showed that the trajectory of the spray was directed towards the lower wall of the port with injection against the closed valves. With open valve injection, a large portion of the fuel was lifted by the co-flowing air towards the upper half of the port and this was confirmed by simulation and visualization.
Keywords
Motorcycle; Fuel Evaporation; Equivalence Ratio; Port Fuel Injection;
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  • Reference
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