High-pressure pump control unit
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United States of America Patent
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May 19, 2020
Grant Date -
Jul 27, 2017
app pub date -
Oct 18, 2016
filing date -
Jan 21, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
When a condition for reducing a noise caused in the high-pressure pump is satisfied, a reduction control unit implements a noise reduction control to supply a smaller power to reduce a moving speed of a movable portion in a close acting direction to put a valve body into a closed state for a predetermined time after an energization start timing of a solenoid in a plunger rising period. A closing control unit causes a closing current, which is a constant current for surely putting the valve body into the closed state, to flow the closing current in the solenoid when the noise reduction control is completed in the plunger rising period. The predetermined time is shorter than an energization period in which a current flows in the solenoid.
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