Internal-combustion engines – Charge forming device – Fuel flow regulation between the pump and the charge-forming...
Reexamination Certificate
2005-05-10
2005-05-10
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel flow regulation between the pump and the charge-forming...
C123S458000
Reexamination Certificate
active
06889666
ABSTRACT:
A fuel pressure control apparatus for a cylinder injection type engine capable of restarting the engine without fail notwithstanding increase of fuel pressure due to temperature rise immediately after stoppage of engine operation. Fuel is supplied from a high pressure fuel pump (5) to a fuel rail (2) to be injected by fuel injection valves (1) into combustion chambers (20) of cylinders. An ECU (10) estimates increment (ΔP) of the fuel pressure (PF) within the fuel rail (2) after stoppage of the engine operation on the basis of a water temperature (THW) and an intake air temperature (THA) to restrict a maximum value of a desired fuel pressure (Po) so that a sum value (PM) of the desired fuel pressure (Po) and the increment (ΔP) does not exceed the critical actuation pressure (Pi) of the fuel injection valve (1).
REFERENCES:
patent: RE36119 (1999-03-01), Kunishima et al.
patent: 6539921 (2003-04-01), Matsumura
patent: 6715470 (2004-04-01), Takahashi
patent: 07-253041 (1995-10-01), None
Gimie Mahmoud
Mitsubishi Denki & Kabushiki Kaisha
Sughrue & Mion, PLLC
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