The Spray Characteristics of Dual-Stream Port Fuel Injectors for Applications to 4-Valve Gasoline Engines

Format:

Conference/Event

Author/Creator:

Zhao, Fu-Quan, author.

Conference Name:

1995 SAE International Fall Fuels and Lubricants Meeting and Exhibition (1995-10-16 : Toronto, Canada)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1995

Summary:

An experimental study of sprayod structures from a regular dual-stream (RDS) injector and an air-shrouding dual-stream (ASDS) injector was carried out extensively to understand the spray characteristics of dual-stream (DS) port fuel injector for applications to 4-valve gasoline engines. The injectors were tested under steady and transient conditions at different injection pressures. The global spray structures were visualized using planar laser Mie scattering (PLMS) technique and spray atomization processes were quantified using phase Doppler anemometry (PDA) technique. The experimental results showed that at the beginning of fuel injection, the spray tip penetration for the RDS injector decreases with an increase in injection pressure; however, at the later stage of fuel injection, it increases when the injection pressure is increased. It is also found that the ligaments are dominant near the injector tip for the RDS injector with threads connecting the two streams. These phenomena can not be observed from the ASDS sprays. For the ASDS injector, spray atomization characteristics are improved a lot; however, the separate emergence of two streams is not observed when the shrouding air flows into the injector

Notes:

Vendor supplied data

Publisher Number:

952487

Access Restriction:

Restricted for use by site license