Pressure spike attenuator for automotive fuel injection system
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United States of America Patent
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Jun 11, 2002
Grant Date -
N/A
app pub date -
Sep 1, 2000
filing date -
Sep 1, 2000
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A fuel injection system for an internal combustion engine includes a pressure spike attenuator that is installed between the pump and fuel rail inlet of the system. This pressure spike attenuator includes an expandable pressure vessel having a sidewall that is corrugated in cross-section to facilitate volumetric expansion of the pressure vessel. A solenoid valve includes a tapered needle that is moved between an opened and a closed position. In the opened position, the fuel pump, the pressure vessel, and the fuel rail are all in fluid communication with one another. In the closed position, the pressure vessel is isolated from both the fuel pump and the fuel rail, and the fuel rail is isolated from both the fuel pump and the pressure vessel.
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