公开(公告)号：US20180195480A1

公开(公告)日：2018-07-12

申请号：US15742066

申请日：2016-05-25

Applicant: DENSO CORPORATION

Inventor： Yuusuke TODA ,  Shuichi MATSUMOTO ,  Yoshinori YAMASHITA

IPC: F02M61/18 ,  F02M51/06 ,  F02M69/00

CPC classification number: F02M61/188 ,  F02M51/06 ,  F02M51/0603 ,  F02M61/04 ,  F02M61/18 ,  F02M61/1873 ,  F02M69/00

Abstract: A fuel injection valve includes a valve housing having an injection hole and a valve seat surface tapering toward a downstream side, a valve component that is accommodated in the valve housing and is coaxially separated from or seated on the valve seat surface, and an elastic component biasing the valve component toward the valve seat surface. The valve component includes an inner convex surface curved in a partial spherical shape with a predetermined curvature radius, and an outer convex surface that is provided continuously to the outer peripheral side of the inner convex surface and curved in a partial spherical shape having a smaller curvature radius than the inner convex surface. A boundary portion between the inner convex surface and the outer convex surface protrudes toward the valve seat surface so as to be able to be separated from or seated on the valve seat surface.

公开(公告)号：US20190331076A1

公开(公告)日：2019-10-31

申请号：US16508369

申请日：2019-07-11

Applicant: DENSO CORPORATION

Inventor： Makoto SAIZEN ,  Shuichi MATSUMOTO ,  Keita IMAI ,  Moriyasu GOTO

IPC: F02M51/06 ,  F02M61/10

Abstract: A fuel injection valve includes: a coil; a stationary core to generate a magnetic force; a movable structure including a moving core and a valve body and internally having a movable flow passage; and a body that internally accommodates the movable structure and internally has a part of the flow passage. The movable structure includes a throttle portion at which a passage area of the movable flow passage is partially throttled. The flow passage includes a throttle flow passage defined by the throttle portion and a separate flow passage between the movable structure and the body. A passage area of the separate flow passage is smaller than a passage area of the throttle flow passage. A position of the separate flow passage in a direction perpendicular to a moving direction of the movable structure is different from an outermost peripheral position of the moving core.