FLOW SENSING FUEL SYSTEM
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United States of America Patent
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Issued Date -
Oct 8, 2009
app pub date -
Apr 7, 2008
filing date -
Apr 7, 2008
priority date (Note) -
Abandoned
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Abstract
A flow sensing fuel system for multiple port fuel injection gasoline engines, gasoline direct injection engines, or common rail diesel engines include a flow monitoring device positioned in a fuel flow passage between a fuel pump and a fuel rail, a fuel pressure sensor in fluid communication with said fuel rail, and a controllable pressure regulator closing to a fuel tank. By integrating flow monitoring device, fuel pressure sensor, and controllable pressure regulator in existing fuel systems, a flow sensing fuel system is provided that protects the engine and limits the fuel leaking into the environment in case of a stuck open condition or sealing problem of one or more injectors or in case of a leak in the fuel rail assembly. The flow sensing fuel system enables monitoring the fuel flow during engine start-up, during engine operation, and after engine shut down.
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