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Aisan Fuel Injector for Multipoint Injection System
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English
Abstract
The relation between the dynamic control range and the valve behavior has been studied. The results show that reduction of valve bounce and short valve closing time are important to the expansion of the dynamic control range. Non-linearity of fuel flow at short pulse widths is caused by the valve bounce and inertia force. Therefore, lessening valve weight is very effective to obtain good linearity. Our valve is composed of a steel ball, a pipe and an armature welded together by laser, and the weight is reduced to half of a conventional pintle needle. The valve is closed only by spring force. While satisfying minimum operating voltage; 6 V, dimensional factors were optimized to obtain higher spring preset load. This made it possible to reduce the valve closing time. Consequently this injector exhibits a greater dynamic control range.
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Citation
Matsubara, M., Ando, T., Takada, S., and Takeuchi, H., "Aisan Fuel Injector for Multipoint Injection System," SAE Technical Paper 860486, 1986, https://doi.org/10.4271/860486.Also In
References
- Smith D. H. Spinweber D. A. “A General Model for Solenoid Fuel Injector Dynamics” SAE Paper 800508 February 1980
- Karidis J. P. Turns S. R. “Fast-Acting Electromagnetic Actuators-Computer Model Development and Verification” SAE Paper 820202 February 1982
- Degrace L. G. Bata G. T. “The Bendix DEKA Fuel Injector Series-Design and Performance” SAE Paper 850559 February 1985
- Oya T. et al. “Dynamical Characteristics of Electromagnetic Gasoline Injector Valve” Research Reports of the Faculty of Engineering Meiji University 42 March 1982