Controller for common rail fuel injection system

Details Controller for common rail fuel injection system Controller for common rail fuel injection system

2006-08-22

2008-03-25

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S456000

Reexamination Certificate

active

07347188

ABSTRACT:
In a common rail fuel injection system, a fuel pump pressure-feeds fuel to a common rail, which accumulates the fuel at high pressure corresponding to fuel injection pressure. An electronic control unit (ECU) drives and controls a suction control valve provided in the fuel pump to regulate a pressure-feeding amount of the fuel and to perform fuel pressure feedback control. The ECU calculates a differential term of a control amount of the suction control valve based on a pressure deviation of the fuel pressure in the common rail with respect to target pressure. The ECU sets the differential term at zero when the fuel pressure is higher than the target pressure and the differential term of the control amount is a value for pressure-feeding the fuel.

REFERENCES:
patent: 5237975 (1993-08-01), Betki et al.
patent: 2002-276500 (2002-09-01), None
patent: 2004-5446 (2004-01-01), None
patent: 200576618 (2005-03-01), None

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