| 摘要 |
A valve seat member which partitions between a supply passage and a pressurizing chamber, includes an inner flow path, which communicates between the supply passage and the pressurizing chamber, and an outer flow path, which is placed on a radially outer side of the inner flow path. An inner valve is seatable against inner valve seat formed in an opening of the inner flow path. An outer valve is contactable with an end surface of the inner valve, which is opposite from the inner valve seat. The outer valve is seatable against an outer valve seat, which is formed in an opening of the outer flow path. |
| 主权项 |
1. A high pressure pump comprising:
a plunger that is reciprocatable; a pump body that includes:
a pressurizing chamber, in which fuel is pressurized through reciprocation at the plunger; anda supply passage, which supplies the fuel to the pressurizing chamber; a valve seat member that partitions between the supply passage and the pressurizing chamber, wherein the valve seat member includes:
an inner flow path, which communicates between the supply passage and the pressurizing chamber; andan outer flow path, which is placed on a radially outer side of the inner flow path and communicates between the supply passage and the pressurizing chamber; an inner valve that is seatable and is liftable relative to an inner valve seat, which is formed in an opening of the inner flow path; an outer valve that is contactable with an end surface of the inner valve, which is opposite from the inner valve seat, wherein the outer valve is seatable and is liftable relative to an outer valve seat, which is formed in an opening of the outer flow path; a rod that is received through the inner flow path of the valve seat member and controls movement of the inner valve and movement of the outer valve; and at least one movement limiting device that limits a lift amount of the inner valve from the inner valve seat and a lift amount of the outer valve from the outer valve seat. |
