Displacement control valve
AssigneeEagle Industry Co., Ltd.
InventorsDaichi Kurihara, Kohei Fukudome, Masahiro Hayama, Keigo Shirafuji
Life of this patent
Estimating the term…
Abstract
A displacement control valve includes a housing a first, a second, and a third chamber; a valve body having a first reciprocating valve part that opens or closes discharge paths in the first chamber; and a solenoid that applies electromagnetic force to the valve body in the direction that closes the first valve part. The control valve has a spool valve part formed on the external circumference of the valve body and a spool seating part formed on the internal circumference of the valve housing and that is opened while the first valve part is closed and vice versa upon reciprocation of the valve body to control the rate of flow between a control chamber and an inlet chamber.
Claims19
A displacement control valve comprising:
- a valve housing including a first chamber formed between discharge paths that allow a discharge chamber for discharging fluid to communicate with a control chamber for controlling a volume of the discharged fluid, a second chamber formed between inlet paths that allow an inlet chamber for sucking the fluid to communicate with the control chamber, and a third chamber opposed to the second chamber across the first chamber;
- a valve body that has a first valve part for opening or closing the discharge paths in the first chamber and that is reciprocated to open or close the discharge paths;
- and
- a solenoid configured to apply electromagnetic force to the valve body in the direction that closes the first valve part,
- wherein the displacement control valve has a spool valve structure that comprises a spool valve part formed on an external circumference of the valve body and a spool seating part formed on an internal circumference of the valve housing and that is opened while the first valve part is closed and vice versa upon reciprocation of the valve body to control the rate of flow between the control chamber and the inlet chamber,
- the valve body further includes communication path that is formed inside the valve body and partially forms the inlet paths such that the communication path extends from the third chamber to the second chamber,
- the first valve part is formed on a first end side of the valve body, and the valve body further has a second valve part formed on a second end side of the valve body and configured to open and close the inlet paths in the second chamber, the first end side and the second end side being opposed to each other in an axial direction of the valve body.
Dependencies are inferred from the claim text.