This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effects of Mixture Formation of Fuel Injection Systems in Gasoline Engine
Annotation ability available
Sector:
Language:
English
Abstract
Effects of mixture formation of fuel injection systems on gasoline engine performance have been studied. Several fuel injectors which produced various spray diameters and spray patterns were used in engine tests. Spray behavior in an air flow was investigated to clarify the spray distribution through the intake valve. The relationships between the spray distribution near the intake valve and the HC emission or engine response were considered. The amount of HC emissions increased if fuel was injected when the intake valve was open with a heavy load (e.g. an engine speed of 2000 rpm and a manifold pressure of 98 kPa), because fuel would flow into the cylinders one-sidedly, causing a liquid film to form. The amount of HC emissions also increased if fuel was injected when the intake valve was open with a light load (e.g. during idling), because the fuel injection pulse would be short and fuel would flow into the cylinders, but the air-fuel mixing would not be enough to cause a misfire. Reducing the spray droplets diameters, spreading fuel uniformly on the intake valve, and reducing the fuel film on the cylinder wall, all could prevent an increase in HC emissions.
Authors
Citation
Nogl, T., Ohyama, Y., and Yamauchi, T., "Effects of Mixture Formation of Fuel Injection Systems in Gasoline Engine," SAE Technical Paper 891961, 1989, https://doi.org/10.4271/891961.Also In
References
- Nogi T. et al SAE paper 880558 1988
- Kosovski M. G. SAE paper 850294 1985
- Iwata M. et al JSAE 861 1986 in Japanese
- Arase T. et al The 6 th internal combustion engine joint symp. paper 1987 in Japanese
- Fujii K. et al JSAE No. 861 1986 in Japanese