Control device for high pressure pump

A control device for a high pressure pump that is applied to a high pressure pump including a plunger that reciprocates with rotation of a rotating shaft so that a capacity of a pressurization chamber is variable, and a regulating valve having a valve body placed in a fuel suction passage communicating with the pressurization chamber, the regulating valve supplying fuel to the pressurization chamber and shutting off fuel supply to the pressurization chamber, as a result of moving the valve body by switching an electromagnetic part between an energized state and a non-energized state, and that adjusts a fuel discharge amount of the high pressure pump by switching the regulating valve between an open state and a closed state, the control device comprising:

• a plurality of sound reducing parts that is operated individually, when a predetermined condition for operation is met, at each of a plurality of timings when an operating sound is generated as a result of a movement of the valve body, in one open-and-close period in which the valve body makes an opening movement and a closing movement, and that reduces the operating sound, at each of the plurality of the timings, by changing a period of energizing the electromagnetic part to an increase side relative to a normal time;
• an upper limit determination part that determines whether a required period of energizing the electromagnetic part in the one open-and-close period exceeds a predetermined upper limit value, when all the plurality of the sound reducing parts are operated;
• and
• a selectively operating part that selects and operates one or more of the plurality of the sound reducing parts to an extent that the required period of energizing does not exceed the upper limit value, when the upper limit determination part has determined that the required period of energizing exceeds the upper limit value.