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Rapid Fuel Injector Re-Pressurization
Technical Paper
2007-01-1075
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A fuel system design objective is to have the fuel injection pressure at target pressure by the time of the first injection. In most cases, a vapor and air space forms in the highest and hottest part of the fuel injector supply as the fuel system cools following engine-off. Upon key-on, the fuel pump needs to collapse the fuel vapor and compress any air before fuel pressure can build thus delaying fuel injector re-pressurization. An inventive solution to speed re-pressurization is described. It effectively eliminates the need to collapse the fuel vapor and compress any air in the first few tenths of seconds of fuel injection re-pressurization. The factors that affect fuel injection re-pressurization time are discussed.
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Citation
Pursifull, R., "Rapid Fuel Injector Re-Pressurization," SAE Technical Paper 2007-01-1075, 2007, https://doi.org/10.4271/2007-01-1075.Also In
References
- McDonald, Dennis Engine Position Tracking At Shutdown SAE 2005-01-0048
- Pursifull, Ross Fuel Rail Pressure Relief SAE 2006-01-0626
- Lavoie G. A. et. al V/L Effect on Vapor Pressure Measurement of Fuel Boiling Range Fuels Using the Two-Part Injection Method SAE 930378
- Bosch Automotive Handbook 2nd 172