US 10,890,269 B2Granted

Valve apparatus

AssigneeDenso Corporation

InventorsTakashi Furukawa, Toshihisa Nakajima

Life of this patent

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Abstract

In a valve apparatus, a housing includes a plurality of through holes through which a fluid flows. A first valve member opens and closes a first through hole. A second valve member opens and closes at least one second through hole. A fixed core does not move relative to the housing. A coil forms magnetic field. A first movable core moves integrally with the first valve member. When the coil forms the magnetic field, a magnetic attractive force is generated between the first movable core and the fixed core. A second movable core moves integrally with the second valve member. When the coil forms the magnetic field, a magnetic attractive force is generated between the second movable core and the fixed core. A magnetic constriction portion is provided between the fixed core and the first movable core. The second through hole is opened after the first through hole is opened.

Claims21

Dependent claims

A valve apparatus comprising:

a housing that includes a plurality of through holes through which a fluid flows from the valve apparatus;
a first valve member that is provided so as to move relative to the housing, and opens and closes a first through hole that is at least one or more of the plurality of through holes;
a second valve member that is provided so as to move relative to the housing, and opens and closes at least one second through hole of the plurality of through holes excluding the first through hole;
a fixed core that is provided in such a manner that the fixed core does not move relative to the housing;
a coil that forms a magnetic field by being energized;
a control unit that controls energization of the coil;
a first movable core that is provided so as to move integrally with the first valve member, and in which a magnetic attractive force is generated between the first movable core and the fixed core when the coil forms the magnetic field;
a second movable core that is provided so as to move integrally with the second valve member, and in which a magnetic attractive force is generated between the second movable core and the fixed core when the coil forms the magnetic field;
and
a magnetic constriction portion that is provided between the fixed core and the first movable core, wherein:
the coil, the first valve member and the second valve member are configured such that energization of the coil causes movement of the first and second valve members from closed positions to open positions;
the control unit is configured to control the energization of the coil such that the second through hole is opened by movement of the second valve member after the first through hole is opened by movement of the first valve member;
the second through hole is provided in a position that is radially outside of the periphery of the first through hole;
and
the second valve member is a cylindrical member that is provided in an outer radial direction from the first valve member.

12 more elements

A valve apparatus comprising:

a housing that includes a plurality of through holes through which a fluid flows from the valve apparatus;
a first valve member that is provided so as to move relative to the housing, and opens and closes a first through hole that is at least one or more of the plurality of through holes;
a second valve member that is provided so as to move relative to the housing, and opens and closes at least one second through hole of the plurality of through holes excluding the first through hole;
a fixed core that is provided in such a manner that the fixed core does not move relative to the housing;
a coil that forms a magnetic field by being energized;
a control unit that controls energization of the coil;
a first movable core that is provided so as to move integrally with the first valve member, and in which a magnetic attractive force is generated between the first movable core and the fixed core when the coil forms the magnetic field;
a second movable core that is provided so as to move integrally with the second valve member, and in which a magnetic attractive force is generated between the second movable core and the fixed core when the coil forms the magnetic field;
and
a magnetic constriction portion that is provided between the fixed core and the first movable core, wherein:
the coil, the first valve member and the second valve member are configured such that energization of the coil causes movement of the first and second valve members from closed positions to open positions;
the control unit is configured to control the energization of the coil such that the second through hole is opened by movement of the second valve member after the first through hole is opened by movement of the first valve member;
and
the control unit controls energization of the coil such that, after the second through hole is opened after the first through hole is opened, the first through hole is closed while the second through hole remains open.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/041,986Filed 23 Jul 2018
Priority: JP 2017-14633528 Jul 2017
Published: US 2019/0032808 A131 Jan 2019
Granted: 12 Jan 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

F16K 31/06
Electric ; magnetic: using a magnet , e.g. diaphragm valves, cutting off by means of a liquid
F02D 41/20
Electrical control of supply of combustible mixture or its constituents: output circuits, e.g. for controlling currents in command coils
F02M 21/0254
Details of actuators therefor: electric actuators, e.g. solenoid or piezoelectric
F02M 21/0266
Inwardly opening single or multi nozzle valves, e.g. needle valves: hollow stem valves; Piston valves; Stems having a spherical tip