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US 11,753,969 B2Granted
Recirculating hydraulic fluid control valve
AssigneeSchaeffler Technologies AG & Co. KG
InventorsGustavo de Oliveira Figueiredo, Andrew Mlinaric
Life of this patent
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Abstract
A hydraulic fluid control valve (HFCV) configured to recirculate an exiting hydraulic fluid from a first hydraulic actuation chamber to a second hydraulic actuation chamber is provided. The HFCV includes a selectively movable spool having an inner fluid chamber configured to receive and deliver the exiting hydraulic fluid to one or both of either a sump or one of the first or second hydraulic actuation chambers.
Claims12
A hydraulic fluid control valve, comprising:
- a housing having:
- a first fluid port configured to be fluidly connected to a first hydraulic actuation chamber;
- and,
- a second fluid port configured to be fluidly connected to a second hydraulic actuation chamber, the first hydraulic actuation chamber and the second hydraulic actuation chamber configured to receive and exit hydraulic fluid;
- and,
- a spool disposed at least partially within the housing, the spool having:
- a vent aperture;
- a first aperture;
- a second aperture;
- and,
- a third aperture;
- and,
- the first aperture, the second aperture, and the third aperture are configured to move in unison;
- and,
- each of the first aperture, the second aperture, and the third aperture are continuously fluidly connected to each other;
- and,
- in a first axial position of the spool:
- the first aperture is configured to receive hydraulic fluid from the first hydraulic actuation chamber;
- the second aperture is configured to deliver a first portion of the hydraulic fluid from the first hydraulic actuation chamber to the second hydraulic actuation chamber;
- and,
- the vent aperture is configured to exit a second portion of the hydraulic fluid from the first hydraulic actuation chamber;
- and,
- in a second axial position of the spool:
- the third aperture is configured to receive hydraulic fluid from the second hydraulic actuation chamber;
- the second aperture is configured to deliver a first portion of the hydraulic fluid from the second hydraulic actuation chamber to the first hydraulic actuation chamber;
- and,
- the vent aperture is configured to exit a second portion of the hydraulic fluid from the second hydraulic actuation chamber.
24 more elements
A hydraulic fluid control valve, comprising:
- a housing having a first fluid port and a second fluid port, the first fluid port configured to be fluidly connected to a first hydraulic actuation chamber, the second fluid port configured to be fluidly connected to a second hydraulic actuation chamber, and the first hydraulic actuation chamber and the second hydraulic actuation chamber configured to receive and exit hydraulic fluid;
- and,
- a spool disposed at least partially within the housing, the spool having an inner fluid chamber configured to directly contact hydraulic fluid, the inner fluid chamber including:
- a first aperture;
- a second aperture;
- and,
- a third aperture;
- and
- the inner fluid chamber configured to:
- i) continuously fluidly connect each of the first aperture, the second aperture, and the third aperture to each other;
- ii) receive hydraulic fluid from the first hydraulic actuation chamber and deliver a first portion of the hydraulic fluid from the first hydraulic actuation chamber to the second hydraulic actuation chamber when the spool is in a first axial position;
- and, iii) receive hydraulic fluid from the second hydraulic actuation chamber and deliver a first portion of the hydraulic fluid from the second hydraulic actuation chamber to the first hydraulic actuation chamber when the spool is in a second axial position;
- and,
- a one-way valve configured to:
- i) allow hydraulic fluid from the first hydraulic actuation chamber or hydraulic fluid from the second hydraulic actuation chamber to flow from the inner fluid chamber to the respective second hydraulic actuation chamber and the first hydraulic actuation chamber, and ii) prevent hydraulic fluid flow into the inner fluid chamber when the spool is in the first axial position and the second axial position.
12 more elements
Dependencies are inferred from the claim text.