Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2005-11-22
2005-11-22
Lo, Weilun (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S456000, C123S357000, C123S514000, C137S487500, C700S047000, C700S282000, C701S103000, C701S104000
Reexamination Certificate
active
06966300
ABSTRACT:
When a learning condition is satisfied, control device performs a feedback control. In the feedback control, a metering valve control value is progressively increased to progressively increase a degree of opening of an inlet metering valve, and a pressure of a common rail is kept constant. When the amount of change in a pressure-reducing valve control value becomes equal to or less than a predetermined value, a current metering valve control value, which is currently supplied to the inlet metering valve, is obtained as a maximum discharge rate control value. Also, an intake initiation control value, at which a high pressure pump begins intake of fuel, is obtained. Then, based on these values, a pump characteristic is obtained. Thereafter, the control device obtains the metering valve control value based on a computed degree of opening of the inlet metering valve and the pump characteristic.
REFERENCES:
patent: 4773370 (1988-09-01), Koshizawa et al.
patent: 5483940 (1996-01-01), Namba et al.
patent: 6101456 (2000-08-01), Kowatari et al.
patent: 6539921 (2003-04-01), Matsumura
patent: 2001/0027775 (2001-10-01), Sakai et al.
patent: A-2001-82230 (2001-03-01), None
Lo Weilun
Nixon & Vanderhye P.C.
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