FUEL SUPPLY PUMP

WIPO Patent Application WO/2021/095556

A1

Provided is a fuel supply pump capable of improving weld quality while maintaining function of a valve element. The fuel supply pump of the present invention comprises: a restricting member (discharge valve stopper 84) that guides the movement of a valve element (discharge valve 82); a main body part (body 1) to which is provided a valve chamber (discharge valve chamber 1d) for accommodating the restricting member; a sealing member (plug 85) that seals the valve chamber; and a weld section (weld section 86) where the sealing member is fixed to the main body part. An annular-space section (annular-space section 60) is formed along the outer periphery of the restricting member and between the weld section and the restricting member. The restricting member has a positioning part (fitting part 84a) for positioning the restricting member on the side opposite the sealing member with respect to the main body part, and a gap-forming section (gap-forming section 84c) that forms an annular gap (annular gap 63) with the main body part. The annular gap causes the annular space section and the space on the positioning part side of the valve chamber to communicate.

YAGAI MASAMICHI (JP)
OGURA KIYOTAKA (JP)
TAMURA SHINGO (JP)
ISHIZUKA YUTO (JP)
YAMADA HIROYUKI (JP)
TOKUO KENICHIRO (JP)
HASHIDA MINORU (JP)

PCT/JP2020/040759

May 20, 2021

October 30, 2020

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HITACHI ASTEMO LTD (JP)

F02M59/46

JP2017072026A	2017-04-13
JP2019143562A	2019-08-29

TODA Yuji (JP)

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