Improvement of Spray Characteristics in Port Injectors 2012-32-0071
Fuel spray injected by a port injector has significant effects on engine power output and combustion efficiency. For this reason, it is necessary to atomize fuel into fine droplets and accurately supply it without being susceptible to any changes in temperature or negative pressure affected by engine. This document introduces an atomization technique with optimized layout of nozzle holes and drastically reduced pressure loss (energy loss) in the flow under a needle valve seat. It also describes an injector having a short fuel flow path and a small dead volume under the valve seat, which can have good resistance against any changes in temperature and negative pressure.
Citation: Nakamura, J., Akabane, A., Kitamura, K., and Sasaki, Y., "Improvement of Spray Characteristics in Port Injectors," SAE Technical Paper 2012-32-0071, 2012, https://doi.org/10.4271/2012-32-0071. Download Citation
Author(s):
Junichi Nakamura, Akira Akabane, Koji Kitamura, Yuzuru Sasaki
Affiliated:
Keihin Corp.
Pages: 7
Event:
2012 Small Engine Technology Conference & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Fuel injection
Valves
Pressure
Combustion and combustion processes
Nozzles
Drag
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »
