公开(公告)号：US10781928B2

公开(公告)日：2020-09-22

申请号：US16318163

申请日：2017-07-18

Applicant: DENSO CORPORATION

Inventor： Hiroshi Tanimura ,  Akira Takagi ,  Atsushi Motoki ,  Tsunehito Watanabe

IPC: F16K11/07 ,  F16K3/24

Abstract: A critical state is assumed in which a position of one end of the opening of the input port in the axial direction and a position of the other end of the groove in the axial direction accord with each other with respect to the axial direction. In the critical state, when a straight line is extended in the axial direction as well as radially outward of the spool without changing a direction of the straight line in a circumferential direction of the spool from one end of the groove bottom in the axial direction with the same inclination as the inclination of the groove bottom at the one end of the groove in the axial direction relative to the axial direction, the straight line passes through the opening of the output port to contact a wall surface of the output port.

公开(公告)号：US10139008B2

公开(公告)日：2018-11-27

申请号：US15386319

申请日：2016-12-21

Applicant: DENSO CORPORATION

Inventor： Atsushi Motoki ,  Akira Takagi

IPC: F16K31/06 ,  F16K11/07 ,  F16H61/02

Abstract: A spool valve includes a valve housing and a spool. The spool is slidable in an axial direction in the valve housing. A linear solenoid drives the spool against a spring. The valve housing has a feedback chamber to apply a force to the spool, an input port to receive a hydraulic pressure, an output port to produce an output pressure according to an axial position of the spool, and an drain port to exhaust oil to an outside. The spool valve has multiple supply paths to cause oil to flow from the input port to the output port and/or multiple exhaust paths to cause oil to flow from the output port to the drain port.