High pressure fuel supply control system for internal...

Details High pressure fuel supply control system for internal... High pressure fuel supply control system for internal...

2009-05-07

2011-12-20

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

With fuel pump

C123S456000

Reexamination Certificate

active

08079345

ABSTRACT:
A high pressure fuel supply control system for an internal combustion engine includes fuel injectors connected to a common rail, and a high pressure fuel pump for pressure-feeding to the common rail fuel that is supplied from a low-pressure fuel pump. The high pressure fuel pump includes a pressurized chamber, a plunger for pressurizing the fuel in the pressurized chamber, a fuel passage valve provided in the pressurized chamber, and an actuator for operating the fuel passage valve. A drive signal calculation unit calculates a drive signal for driving the actuator to control the discharge quantity of the high pressure fuel pump and the pressure in the common rail. The drive signal calculation unit maintains the discharge quantity of the high pressure fuel pump equal to or larger than a prescribed value.

REFERENCES:
patent: 6725837 (2004-04-01), Hiraku et al.
patent: 2002/0033167 (2002-03-01), Hiraku et al.
patent: 2004/0069278 (2004-04-01), Okamoto et al.
patent: 2006/0118089 (2006-06-01), Tokuo et al.
patent: 2007-23930 (2007-02-01), None
patent: 2007-327409 (2007-12-01), None

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