International Journal of Automotive Technology
- 제2권4호
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- Pages.165-170
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- 2001
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- 1229-9138(pISSN)
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- 1976-3832(eISSN)
SPRAY STRUCTURE OF HIGH PRESSURE GASOLINE INJECTOR IN A GASOLINE DIRECT INJECTION ENGINE
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Lee, Chang Sik
(Department of Mechanical Engineering, Hanyang University) ;
- Chon, Mun Soo (Technical Center, Daewoo Motor Co., Ltd.) ;
- Park, Young Cheol (Department of Automotive Engineering, Shinsung College)
- 발행 : 2001.12.01
초록
This study is focussed on the investigation of spray characteristics from the high pressure gasoline injector for the application of gasoline direct injection engine. For the analysis of spray structure of high pressure gasoline injector; the laser scattering method with a Nd-Yag laser and the Phase Doppler particle analyzer system were applied to observe the spray development and the measurement of the droplet size and velocity of the spray, respectively. Also spatial velocity distribution of the spray droplet was measured by use of the particle image velocity system. Experimental results show that high pressure gasoline injector shapes the hollow-cone spray, and produce the upward ring shaped vortex on the spray surface region. This upward ring shaped vortex promotes the secondary atomization of fuel droplets and contributes to a uniform distribution of fuel droplets. Most of fuel droplets are distributed under 31
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