High pressure fuel pump control apparatus for an engine

Details High pressure fuel pump control apparatus for an engine High pressure fuel pump control apparatus for an engine

2007-11-13

2007-11-13

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S458000

Reexamination Certificate

active

11377726

ABSTRACT:
A high pressure fuel pump control apparatus for an engine can suppress or avoid uncontrolled fuel delivery of a flow control valve upon delivery of a maximum amount of fuel, and resultant great deterioration in drivability and exhaust gas. An advance angle setting limiting section limits a closed position of the flow control valve from being set to a location advanced from a predetermined advance angle limiting position. A flow control valve control section decides a target pressure in accordance with an engine operating condition, and sets the closed position such that the fuel pressure coincides with the target pressure. When the closed position is being controlled to be limited to the advance angle limiting position, and when the fuel pressure does not show a tendency to coincide with the target pressure, the advance angle limiting position is changed from the last set value to a value more retarded therefrom.

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