Hitachi Astemo Ltd.

Yuto Ishizuka

Hiroyuki Yamada

Kenichiro Tokuo

Kiyotaka Ogura

Shingo Tamura

Minoru Hashida

Masamichi Yagai

Provided is a discharge valve mechanism capable of improving responsiveness when a discharge valve is opened, and a high-pressure fuel supply pump including the discharge valve mechanism.

Discharge valve mechanism and high-pressure fuel supply pump including the same

Provided is a fuel supply pump capable of improving welding quality while securing a function of a valve body. A fuel supply pump of the present invention includes a regulating member (discharge valve stopper) that guides movement of a valve body (discharge valve), a main body portion (body) provided with a valve chamber (discharge valve chamber) that houses the regulating member, a sealing member (plug) that seals the valve chamber, and a welded portion (welded portion) that fixes the sealing member to the main body portion. An annular space portion (annular space portion) along an outer periphery of the regulating member is formed between the welded portion and the regulating member. The regulating member includes a positioning portion (fitting portion) for positioning with respect to the main body portion on a side opposite to the sealing member, and a gap forming portion (gap forming portion) forming an annular gap (annular gap) between the gap forming portion and the main body portion, and the annular gap allows a space on a side of the positioning portion in the valve chamber and the annular space portion to communicate with each other.

Fuel supply pump

Growing community of inventors

Hitachinaka, Japan

Yuto Ishizuka