Fuel pump
AssigneeHitachi Astemo, Ltd.
InventorsAtsuji Saito, Satoshi Usui
Life of this patent
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Abstract
A coil component of an electromagnetic valve is made compact to achieve both low cost and improvement in sound vibration performance. Therefore, a high-pressure fuel pump of the present invention includes: a coil 3g; a magnetic core 3e that is arranged on a side opposite to a pressurizing chamber 11 with respect to a movable core 3h and attracts the movable core 3h when the coil 3g is energized; a yoke 3q arranged on a radially outer side of the coil 3g; a cover portion 3r that covers the coil 3g from an axially outer side; and a molded portion 17 that covers a radially outer side of the yoke 3q and an axially outer side of the cover portion 3r.
Claims6
A fuel pump comprising:
- an electromagnetic intake valve mechanism comprising:
- a body:
- a coil;
- a movable core;
- a magnetic core that is arranged on a side opposite to a pressurizing chamber with respect to the movable core and attracts the movable core when the coil is energized;
- a yoke arranged on a radially outer side of the coil;
- a cover portion that covers the coil from an axially outer side;
- and
- a molded portion that covers a radially outer side of the yoke and an axially outer side of the cover portion, wherein
- the yoke includes a bottom portion with a hole formed therein on a side of the pressurizing chamber and an open portion on the side opposite to the pressurizing chamber,
- the cover portion is arranged to cover the open portion,
- an inner peripheral portion of the hole formed in the bottom portion of the yoke and an outer peripheral portion of the body are fixed by press fitting,
- the cover portion is arranged on a radially inner side of the yoke and is arranged with a gap interposed between the cover portion and an inner peripheral surface of the yoke, and
- the molded portion is formed to be in contact with an axially outer end surface of the cover portion and is formed in a range from an axially outer end surface of the yoke over an axial center of an outer peripheral surface of the yoke.
Dependencies are inferred from the claim text.