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| Experiment on impingement spray characteristics of multihole injector in gasoline direct injection engine |
| 1.College of Mechatronic Engineering, North University of China, Taiyuan, Shanxi 030051, China; 2.School of Transportation Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China; 3.China Automotive Technology ＆ Research Center, Tianjin 300162, China |
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Abstract To investigate the impingement spray characteristics of multihole injector in gasoline direct injection engine, the capacity impingement spray experiment device was established. The impingement spray was carried out under the conditions of different ambient pressure and injection pressure.The in fluences of wall inclination and wall distance from injector orifice were considered. The results show that the spray height and the spray radius are increased by the increase of injection pressure. The increasing rate of spray height is decreased with the increase of injection pressure.With the increasing of ambient pressure, the spray height and the spray radius are decreased. However, if ambient pressure rises further, the spray height increases too. The larger the distance from wall to injector orifice and wall inclination is, the greater the spray height and the spray radius will be obtained. The wall inlcination is further increased, the total momentum of impingement droplets is decreased with decreased spray radius due to the spray resistance of outgoing droplet edges.
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2013, Vol. 34 
