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Improvement of Spray Characteristics in Port Injectors
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 23, 2012 by SAE International in United States
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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.
CitationNakamura, 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.
- Matsuo, D. Haramai, A. Sato, K. Ueda, M. “Development of a Small Low-cost Fuel Injector to Overcome Diversification of Requirements in Global Markets,” SAE Technical Paper 2009-32-0055 2009
- Kawahara, M. Saitoh, K. Sato, K. “Reduction of Operation Noises of Injector for Small Motorcycle,” SAE Technical Paper 2011-32-0625 2011