Internal-combustion engines – Charge forming device – With fuel pump
Reexamination Certificate
2006-11-30
2008-10-07
Moulis, Thomas N (Department: 3747)
Internal-combustion engines
Charge forming device
With fuel pump
C123S514000, C123S458000
Reexamination Certificate
active
07431020
ABSTRACT:
A returnless fuel system has a fuel pump whose speed is varied by varying the voltage across the fuel pump. Controlling the fuel pump speed entails sensing the back pressure with a pressure sensor that may lie between the jet pump supply orifice and the pressure regulator in the pressure regulator case. A trigger circuit determines the absolute value of the difference between the sensed back pressure and an average, or predetermined target, pressure and compares it to a predetermined pressure value. If the absolute value is greater than the predetermined value, then a control circuit is invoked that compares the sensed pressure to a high threshold pressure and a low threshold pressure, and based upon such comparisons, the speed of the fuel pump is varied or maintained such that the mean pressure of the fuel system is targeted under all engine consumption conditions.
REFERENCES:
patent: 4248194 (1981-02-01), Drutchas et al.
patent: 4926829 (1990-05-01), Tuckey
patent: 5044344 (1991-09-01), Tuckey et al.
patent: 5148792 (1992-09-01), Tuckey
patent: 5237975 (1993-08-01), Betki et al.
patent: 5265644 (1993-11-01), Tuckey
patent: 5284119 (1994-02-01), Smitley
patent: 5337718 (1994-08-01), Tuckey
patent: 5398655 (1995-03-01), Tuckey
patent: 5411002 (1995-05-01), Smitley
patent: 5505180 (1996-04-01), Otterman et al.
patent: 5579738 (1996-12-01), Frischmuth et al.
patent: 5701869 (1997-12-01), Richardson et al.
patent: 5752490 (1998-05-01), Rodgers et al.
patent: 5765535 (1998-06-01), Radermacher
patent: 5819709 (1998-10-01), Holmes et al.
patent: 6223731 (2001-05-01), Yoshiume et al.
patent: 6279541 (2001-08-01), Doane et al.
patent: 6305362 (2001-10-01), Kitamura et al.
patent: 6318344 (2001-11-01), Lucier et al.
patent: 6357422 (2002-03-01), Doane et al.
patent: 6532941 (2003-03-01), Begley et al.
patent: 6581574 (2003-06-01), Moran et al.
patent: 6715470 (2004-04-01), Takahashi
patent: 6840222 (2005-01-01), Schilling et al.
patent: 6877488 (2005-04-01), Washeleski et al.
patent: 6925990 (2005-08-01), Konopacki
patent: 7188608 (2007-03-01), Wilson et al.
patent: 2002/0020397 (2002-02-01), Begley et al.
patent: 2003/0221675 (2003-12-01), Washeleski et al.
DENSO International America, Inc.
Harness Dickey & Pierce PLC
Moulis Thomas N
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