Fluid supply for rotating piston

• US 9,249,841 B2
• Filed: 07/11/2012
• Issued: 02/02/2016
• Est. Priority Date: 07/11/2012
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Mellet, Edward W., Wilton, Daryl A., Hart, James M.
• Primary Examiner(s): Hlavka, David J
• Application Number:
  US13/546,735
• Publication Number:
  US 20140018204A1
• Time in Patent Office: 1,301 Days
• Field of Search: 475/280, 475/275, 475/296, 475/272, 475/271, 475/276, 475/277, 475/278, 475/288, 192/85.17
• US Class Current: 1/1
• CPC Class Codes: F16D 25/06 in which the fluid actuates a piston incorporated in, i.e. rotating with the clutch F16D25/02 takes precedence
• CPC Class Codes: F16D 25/0638 with more than two discs, e.g. multiple lamellae
• CPC Class Codes: F16H 2057/087 Arrangement and support of friction devices in planetary gearings, e.g. support of clutch drums, stacked arrangements of friction devices see also arrangements for shifting planetary gears F16H3/62, F16H63/3026
• CPC Class Codes: F16H 2200/0078 the gear ratio comprising twelve or more forward speeds
• CPC Class Codes: F16H 2200/2012 with four sets of orbital gears
• CPC Class Codes: F16H 2200/2048 with seven engaging means
• CPC Class Codes: F16H 3/66 composed of a number of gear trains without drive passing from one train to another
• CPC Class Codes: F16H 63/3026 comprising friction clutches or brakes band brake actuating mechanisms F16H63/3003

Abstract

A transmission is provided having an input member, an output member, at least four planetary gear sets, coupling members, and torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes actuatable in combinations of two to establish at least eleven forward gear ratios and one reverse gear ratio. A clutch assembly for use in an automatic transmission is provided that includes an apply piston and a stationary fluid supply member. The apply piston is configured to rotate during at least one gear speed of the automatic transmission. The stationary fluid supply member has portions forming a channel in the stationary fluid supply member and defining an outlet end of the channel. The stationary fluid supply member is configured to supply fluid to the apply piston through the outlet end of the channel.

Claims

1. A clutch assembly for use in an automatic transmission having a stationary member and an input member, the clutch assembly comprising:

an apply piston configured to rotate during at least one output gear speed of the automatic transmission, the apply piston having a circumferential radial end disposed radially outward from the input member;

a stationary fluid supply member attached to the stationary member and having portions forming a channel in the stationary fluid supply member and defining an outlet end of the channel, the stationary fluid supply member being configured to supply fluid to the apply piston through the outlet end of the channel; and

at least one member seal contacting the stationary fluid supply member, the member seal being disposed between the stationary fluid supply member and the apply piston

wherein the portions forming the outlet end of the channel of the stationary fluid member are at least partially disposed radially outward from the circumferential radial end of the apply piston.

2. The clutch assembly of claim 1, further comprising a central input member to the transmission, the apply piston being disposed a first distance from the central input member, and the portions forming the outlet end of the channel of the stationary fluid supply member being disposed a second distance from the central input member, the second distance being greater than the first distance.

3. The clutch assembly of claim 2, further comprising a plurality of interleaved clutch plates, the apply piston being configured to selectively compress the plurality of interleaved clutch plates to couple first and second parts together.

4. The clutch assembly of claim 1, further comprising a rotatable piston housing disposed around the apply piston, the rotatable piston housing and the apply piston configured to rotate together, wherein the member seal contacts the rotatable piston housing, the member seal having a rotating interface with the rotatable piston housing.

5. The assembly of claim 3, wherein the member seal contacts the apply piston, the member seal having a rotating interface with the apply piston, the apply piston having a sliding spline interface with the first part.

6. A transmission comprising:

a stationary member;

an input member;

an output member;

first, second, third, and fourth planetary gear sets each having first, second, and third members;

a first interconnecting member continuously interconnecting the third member of the first planetary gear set with the third member of the fourth planetary gear set;

a second interconnecting member continuously interconnecting the second member of the first planetary gear set with the third member of the third planetary gear set;

a third interconnecting member continuously interconnecting the first member of the first planetary gear set with the second member of the second planetary gear set;

a fourth interconnecting member continuously interconnecting the third member of the second planetary gear set with the second member of the third planetary gear set;

a fifth interconnecting member continuously interconnecting the first member of the second planetary gear set with the second member of the fourth planetary gear set; and

seven torque transmitting mechanisms each selectively engageable to interconnect at least one of the first, second, and third members with at least one other of the first, second, third members and a stationary transmission member, and

wherein the seven torque transmitting mechanisms are selectively engageable in combinations of at least two to establish a plurality of forward speed ratios and at least one reverse speed ratio between the input member and the output member, a first torque transmitting mechanism of the plurality of torque transmitting mechanisms comprising an apply piston configured to rotate during at least one output gear speed of the automatic transmission, the apply piston having a circumferential radial end disposed radially outward from the input member, the first torque transmitting mechanism further comprising a stationary fluid supply member attached to the stationary member and having portions forming a channel in the stationary fluid supply member and defining an outlet end of the channel, the stationary fluid supply member being configured to supply fluid to the apply piston through the outlet end of the channel

wherein the portions forming the outlet end of the channel of the stationary fluid member are at least partially disposed radially outward from the circumferential radial end of the apply piston.

7. The transmission of claim 6, wherein a second of the seven torque transmitting mechanisms is selectively engageable to interconnect the first member of the third planetary gear set with the input member, the second member of the fourth planetary gear set, and the first member of the second planetary gear set;

wherein a third of the seven torque transmitting mechanisms is selectively engageable to interconnect the third member of the second planetary gear set and the second member of the third planetary gear set with the input member, the second member of the fourth planetary gear set, and the first member of the second planetary gear set;

wherein a fourth of the seven torque transmitting mechanisms is selectively engageable to interconnect the first member of the third planetary gear set with the stationary transmission member;

wherein a fifth of the seven torque transmitting mechanisms is selectively engageable to interconnect the second member of the third planetary gear set and the third member of the second planetary gear set with the stationary transmission member;

wherein a sixth of the seven torque transmitting mechanisms is selectively engageable to interconnect the third member of the first planetary gear set and the third member of the fourth planetary gear set with the stationary transmission member;

wherein a seventh of the seven torque transmitting mechanisms is selectively engageable to interconnect the first member of the fourth planetary gear set with the stationary transmission member; and

wherein the output member is continuously connected for common rotation with the second member of the first planetary gear set and the third member of the third planetary gear set.

8. The transmission of claim 7, wherein the first torque transmitting mechanism is selectively engageable to interconnect the third member of the third planetary gear set and the second member of the first planetary gear set with the second member of the third planetary gear set and the third member of the second planetary gear set.

9. The transmission of claim 8, wherein the first torque transmitting mechanism comprises at least one member seal contacting the stationary fluid supply member, the member seal being disposed between the stationary fluid supply member and the apply piston.

10. The transmission of claim 8, wherein the input member is located along a central axis of the transmission, the apply piston of the first torque transmitting mechanism being disposed a first distance from the input member, and the portions forming the outlet end of the channel of the stationary fluid supply member of the first torque transmitting mechanism being disposed a second distance from the input member, the second distance being greater than the first distance.

11. The clutch assembly of claim 10, the first torque transmitting mechanism comprising a rotatable piston housing, the rotatable piston housing being disposed around the apply piston, wherein the member seal contacts the rotatable piston housing, the apply piston configured to rotate with the rotatable piston housing, the member seal having a rotating interface with the rotatable piston housing.

12. The assembly of claim 10, wherein the member seal of the first torque transmitting mechanism contacts the apply piston of the first torque transmitting mechanism, the member seal having a rotating interface with the apply piston.

13. The transmission of claim 10, wherein the third member of the first planetary gear set, the third member of the fourth planetary gear set, the first member of the second planetary gear set, and the first member of the third planetary gear set are sun gear members;

wherein the second members of the first, second, third, and fourth planetary gear sets are planetary gear carrier members; and

wherein the first member of the first planetary gear set, the first member of the fourth planetary gear set, the third member of the second planetary gear set, and the third member of the third planetary gear set are ring gear members.

14. The transmission of claim 8, wherein the first torque transmitting mechanism is selectively engageable to interconnect the first member of the third planetary gear set with the second member of the third planetary gear set and the third member of the second planetary gear set.

15. The transmission of claim 14, wherein the portions forming the outlet end of the channel of the stationary fluid supply member of the first torque transmitting mechanism are at least partially disposed radially outwardly from an outer side of the apply piston.

16. The transmission of claim 15, wherein the input member is located along a central axis of the transmission, the apply piston of the first torque transmitting mechanism being disposed a first distance from the input member, and portions forming the outlet end of the channel of the stationary fluid supply member of the first torque transmitting mechanism being disposed a second distance from the input member, the second distance being greater than the first distance.

17. The transmission of claim 16, wherein the third member of the first planetary gear set, the third member of the fourth planetary gear set, the first member of the second planetary gear set, and the first member of the third planetary gear set are sun gear members;

wherein the second members of the first, second, third, and fourth planetary gear sets are planetary gear carrier members; and

wherein the first member of the first planetary gear set, the first member of the fourth planetary gear set, the third member of the second planetary gear set, and the third member of the third planetary gear set are ring gear members.

18. A clutch assembly for use in an automatic transmission having a stationary member and an input member, the clutch assembly comprising:

an apply piston having an outer side disposed radially outward from the input member, the apply piston configured to rotate during at least one output gear speed of the automatic transmission;

a stationary fluid supply member attached to the stationary member and having portions forming a channel in the stationary fluid supply member and defining an outlet end of the channel, the stationary fluid supply member being configured to supply fluid to the apply piston through the outlet end of the channel, the portions forming the outlet end of the channel being at least partially disposed radially outwardly from the outer side of the apply piston; and

at least one member seal contacting the stationary fluid supply member, the member seal being disposed between the stationary fluid supply member and the apply piston

wherein the portions forming the outlet end of the channel of the stationary fluid member are at least partially disposed radially outward from the outer side of the apply piston.