Thermal valve assembly

• US 7,726,584 B2
• Filed: 05/08/2006
• Issued: 06/01/2010
• Est. Priority Date: 05/08/2006
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (General Motors Company)
• Inventors: Olenzek, Richard F., Berger, Todd R., Loe, Derril A.
• Primary Examiner(s): Denion; Thomas E
• Assistant Examiner(s): Carton; Michael
• Application Number:
  US11/430,255
• Publication Number:
  US 20070257119A1
• Time in Patent Office: 1,485 Days
• Field of Search: 236/93.R, 236/50, 137/389, 137/468, 605/27
• US Class Current: 236/93.00R
• CPC Class Codes: F16H 57/0413 Controlled cooling or heating of lubricant; Temperature control therefor
• CPC Class Codes: F16H 57/0421 on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
• CPC Class Codes: G05D 9/02 without auxiliary power
• CPC Class Codes: Y10T 137/7297 With second diverse control
• CPC Class Codes: Y10T 137/7737 Thermal responsive

Abstract

A thermal valve assembly for a transmission is provided. The thermal valve assembly includes a body having a base portion having a plurality of opposing sidewalls extending therefrom. A cover is mounted with respect to the body and operates to at least partially close the body to form a volume. The base portion defines an inlet orifice, while at least one of the plurality of opposing sidewalls at least partially defines an outlet orifice. A plate is operable to selectively close the inlet orifice. A bi-metallic spring member is disposed at least partially within the volume. The bi-metallic spring member is operable to bias the plate against the base portion. Additionally, the bi-metallic spring member has a variable stiffness characteristic responsive to temperature.

Claims

1. A thermal valve assembly for a transmission, the thermal valve assembly comprising:

a body having a base portion with a plurality of opposing sidewalls extending therefrom;

a cover mounted with respect to said body and operable to at least partially close said body to form a volume;

an inlet orifice defined by said base portion;

an outlet orifice defined at least partially by at least one of said plurality of opposing sidewalls;

a plate operable to selectively close said inlet orifice;

a first post member fixed to and extending from said base portion and at least partially within said volume;

a second post member fixed to and extending from said base portion and at least partially within said volume, the second post member being spaced from the first post member;

wherein the plate is configured to slide along the first post member while the plate is pivoted about the second post member;

wherein the first post member and the second post member remain fixed to said base portion without movement relative to said base portion as the plate slides along the first post member and pivots about the second post member;

a first spring member disposed at least partially within said volume, said first spring member being operable to bias said plate against said base portion; and

wherein said first spring member has a variable stiffness characteristic responsive to temperature.

2. The thermal valve assembly of claim 1, further comprising:

a flange portion at least partially defined by one of said plurality of opposing sidewalls;

a first pin and a second pin extending from said flange portion; and

wherein said first and second pins are sufficiently configured for attachment to a case of the transmission.

3. The thermal valve assembly of claim 2, wherein said first pin and said second pin are generally cylindrical in shape and wherein said first pin is larger in diameter than said second pin.

4. The thermal valve assembly of claim 1, wherein said cover is mounted to said body by one of welding, adhesive bonding, and snap fit.

5. The thermal valve assembly of claim 1, wherein the thermal valve assembly is mounted within an auxiliary sump volume of the transmission and wherein the thermal valve assembly is configured to selectively communicate fluid from the auxiliary sump volume to a main sump volume.

6. The thermal valve assembly of claim 1,

wherein said first post member is configured to retain said first spring member with respect to said body;

and

wherein said plate defines a slot sufficiently configured for said sliding engagement of said first post member.

7. The thermal valve assembly of claim 6, wherein said plate defines a hole generally opposite said slot, said hole being configured to loosely receive said second post member for said pivoting of said plate.

8. The thermal valve assembly of claim 1, further comprising:

a second spring member mounted with respect to the thermal valve assembly; and

wherein said second spring member cooperates with a side cover member of the transmission to retain the thermal valve assembly with respect to the transmission.

14. The thermal valve assembly of claim 1, wherein the inlet orifice and the outlet orifice are at a substantially right angle to each other.

15. The thermal valve assembly of claim 1, wherein the first spring member is bi-metallic.

9. A thermal valve assembly mountable within an auxiliary sump volume of a transmission, the thermal valve assembly comprising:

a body having a base portion with a plurality of opposing sidewalls extending therefrom;

a cover mounted with respect to said body and operable to at least partially close said body to form a volume;

an inlet orifice defined by said base portion;

an outlet orifice defined at least partially by at least one of said plurality of opposing sidewalls;

a plate operable to selectively close said inlet orifice;

said outlet orifice being in fluid communication with said inlet orifice when said plate does not close said inlet orifice and not being in fluid communication with said inlet orifice when said plate closes said inlet orifice;

a bi-metallic spring member disposed at least partially within said volume, said bi-metallic spring member being operable to bias said plate against said base portion;

a first post member fixed to and extending from said base portion and at least partially within said volume;

a second post member fixed to and extending from said base portion and at least partially within said volume, the second post member being spaced from the first post member;

wherein the plate is configured to slide along the first post member while the plate is pivoted about the second post member;

wherein the first post member and the second post member remain fixed to said base portion without movement relative to said base portion as the plate slides along the first post member and pivots about the second post member;

wherein said first post member is configured to retain said bi-metallic spring member with respect to said body;

wherein said plate defines a slot sufficiently configured for said sliding engagement of said first post member; and

wherein said bi-metallic spring member has a variable stiffness characteristic responsive to temperature.

10. The thermal valve assembly of claim 9, wherein said plate defines a hole generally opposite said slot, said hole being configured to loosely receive said second post member for said pivoting of said plate.

11. The thermal valve assembly of claim 9, further comprising:

a flange portion at least partially defined by one of said plurality of opposing sidewalls;

a first pin and a second pin extending from said flange portion; and

wherein said first and second pins are sufficiently configured for attachment to a case of the transmission.

12. The thermal valve assembly of claim 9, wherein said first pin and said second pin are generally cylindrical in shape and wherein said first pin is larger in diameter than said second pin.

13. The thermal valve assembly of claim 9, further comprising:

a second spring member mounted with respect to the thermal valve assembly; and

wherein said second spring member cooperates with a side cover member of the transmission to retain the thermal valve assembly with respect to the transmission.

16. The thermal valve assembly of claim 9, wherein the inlet orifice and the outlet orifice are at a substantially right angle to each other.

17. A thermal valve assembly for a transmission, the thermal valve assembly comprising:

a body having a base portion with a plurality of opposing sidewalls extending therefrom;

a cover mounted with respect to said body and operable to at least partially close said body to form a volume;

an inlet orifice defined by said base portion;

an outlet orifice defined at least partially by at least one of said plurality of opposing sidewalls, the outlet orifice and the inlet orifice being at a substantially right angle to each other;

a plate operable to selectively close said inlet orifice;

said outlet orifice being in fluid communication with said inlet orifice when said plate does not close said inlet orifice and not being in fluid communication with said inlet orifice when said plate closes said inlet orifice;

a thermally responsive spring member disposed at least partially within said volume, said thermally responsive spring member being operable to bias said plate against said base portion; and

wherein said thermally responsive spring member has a variable stiffness characteristic responsive to temperature.

18. The thermal valve assembly of claim 17, wherein the thermal valve assembly is mounted within an auxiliary sump volume of the transmission and wherein the thermal valve assembly is configured to selectively communicate fluid from the auxiliary sump volume to a main sump volume.