Internal-combustion engines – Charge forming device – With fuel pump
Reexamination Certificate
2009-04-23
2010-11-09
Huynh, Hai H (Department: 3747)
Internal-combustion engines
Charge forming device
With fuel pump
C123S511000, C123S514000
Reexamination Certificate
active
07827966
ABSTRACT:
An ECU reduces a fuel flow rate discharged from an electric pump to the filter when a fuel temperature and a fuel pressure in the filter detected by a sensor portion drop. Since a mechanical pump continues to be driven without respect to the fuel quantity discharged from the electric pumps when the fuel flow rate discharged from the electric pump is decreased, a suction pressure is generated at an inlet of the filter. The fuel in a recirculation passage is introduced into the filter through a branch passage. As the result, relatively high temperature fuel is introduced into the filter to melt a solidified fuel causing a clogging of the filter.
REFERENCES:
patent: 5626114 (1997-05-01), Kushida et al.
patent: 7207319 (2007-04-01), Utsumi
patent: 7493893 (2009-02-01), Funabashi et al.
patent: 2002/0092505 (2002-07-01), Rembold et al.
patent: 0 819 844 (1998-01-01), None
Kikutani Takashi
Narisako Hideki
Shinohara Yukihiro
Yonemoto Toshiyuki
Denso Corporation
Huynh Hai H
Nixon & Vanderhye PC
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