Patent ID: 7293548

Claim:
A high pressure fuel pump control apparatus for an engine comprising: a variety of kinds of sensors that detect an operating condition of an engine; a low pressure fuel pump that draws up fuel in a fuel tank and delivers it to a low pressure passage; a high pressure fuel pump that sucks the fuel delivered from said low pressure fuel pump into a pressure chamber and delivers it therefrom; a normally open flow control valve that is arranged in a fuel passage connecting said pressure chamber and either one of said fuel tank and said low pressure passage; a delivery valve that is arranged in a high pressure passage connecting between said pressure chamber and an accumulator; fuel injection valves that supply the fuel in said accumulator to respective combustion chambers of said engine; a fuel pressure sensor that detects the pressure of fuel in said accumulator and outputs the value of the fuel pressure thus detected; a flow control valve control section that controls an amount of delivery fuel of said high pressure fuel pump by setting a closed position of said flow control valve; and an advance angle setting limiting section that limits said closed position from being set to a location advanced from a predetermined advance angle limiting position to an advance angle side; wherein said flow control valve control section decides a target pressure in accordance with the operating condition of said engine, and sets said closed position in such a manner that said detected fuel pressure value coincides with said target pressure; and when said closed position is being controlled to be limited to said advance angle limiting position, and when said detected fuel pressure value does not show a tendency to coincide with said target pressure, said advance angle setting limiting section changes said advance angle limiting position from the last set value to a value more retarded than said last set value.