Other

Shinji Takase

Toshihiko Muramatsu

Takashi Furukawa

There is disclosed a pressure regulating valve which effectively reduces a noise of a fuel pressure regulating valve without relation to a flow amount of a fuel. In this valve, a flow collision preventing member ( ) is fitted to an upper end opening portion of a bush ( ), and an upper portion of the flow collision preventing member ( ) is protruded to a side of a valve body ( ) rather than a valve seat ( ) (an upper end surface of the bush ( )). A plurality of flow passages ( ) for flowing the fuel in an axial direction thereof (in a downward direction) along an inner peripheral surface of the bush ( ) are formed in an outer peripheral portion of the flow collision preventing member ( ) with a uniform interval. A runoff recess portion ( ) running off a protruding portion of the flow collision preventing member ( ) is formed in the valve body ( ) positioned immediately above the valve seat ( ). Since the upper portion of the flow collision preventing member ( ) protrudes out to an inner peripheral side of an annular gap formed between the valve body ( ) and the valve seat ( ), a collision of a flow of the fuel flowing through respective portions of the annular gap toward the inner peripheral direction is prevented by the flow collision preventing member , a pressure pulsation due to the collision of the flow of the fuel is not generated in a lower side of the valve body , and a noise due to the pressure pulsation is reduced.

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Oyama, Japan

Shinji Takase