Dual clutch transmission with radially nested clutches having a common disk carrier

• US 7,318,512 B2
• Filed: 06/07/2005
• Issued: 01/15/2008
• Est. Priority Date: 06/29/2004
• Status: Active Grant

• Current Assignee: BorgWarner Incorporated
• Original Assignee: BorgWarner Incorporated
• Inventors: Bauer, Karl-Heinz, Heinrich, Johannes, Weinhold, Carsten, Guenter, Frank, Heber, Klaus, Hauck, Hans-Juergen, Gerathewohl, Rainer
• Primary Examiner(s): Lorence; Richard M
• Application Number:
  US11/146,844
• Publication Number:
  US 20050284725A1
• Time in Patent Office: 952 Days
• Field of Search: 192/87.11, 192/87.14
• US Class Current: 192/48.619
• CPC Class Codes: F16D 2021/0661 Hydraulically actuated multiple lamellae clutches
• CPC Class Codes: F16D 21/06 at least two driving shafts or two driven shafts being concentric
• CPC Class Codes: F16D 25/0638 with more than two discs, e.g. multiple lamellae
• CPC Class Codes: F16D 25/10 Clutch systems with a plurality of fluid-actuated clutches arrangements or mounting of clutches in vehicles B60K17/00

Abstract

A dual clutch transmission having radially nested clutches includes an outer clutch having a plurality of first outer clutch disks, a plurality of first inner clutch disks, and a first inner support carrier, with the first inner clutch disks operatively mounted to the first inner carrier. The transmission further includes an inner clutch having a plurality of second outer clutch disks, a plurality of second inner clutch disks, and a second inner support carrier is included. The second inner clutch disks are operatively mounted to the second inner carrier. A common disk carrier having a first outer clutch disk carrier operatively supports the first outer clutch disks of the outer clutch and a second outer clutch disk carrier that operatively supports the second outer clutch disks of the inner clutch.

Claims

1. A dual clutch transmission having radially nested clutches comprising:

an outer clutch having a plurality of first outer clutch disks, a plurality of first inner clutch disks, and a first inner support carrier, said first inner clutch disks and said first outer clutch disks operatively and alternately disposed between each other, said first inner clutch disks operatively mounted to said first inner carrier;

an inner clutch having a plurality of second outer clutch disks, a plurality of second inner clutch disks, and a second inner support carrier, said second inner clutch disks and said second outer clutch disks operatively and alternately disposed between each other, said second inner clutch disks operatively mounted to said second inner carrier;

a common disk carrier having a first outer clutch disk carrier that operatively supports said first outer clutch disks of said outer clutch and a second outer clutch disk carrier that operatively supports said second outer clutch disks of said inner clutch;

a first actuating piston adapted to cause said first inner and said first outer disks of said outer clutch to operatively engage each other, and a second actuating piston adapted to cause said second inner and said second outer disks of said inner clutch to operatively engage each other; and

a guide cylinder wherein said first actuating piston is disposed between said guide cylinder and said common disk carrier such that said guide cylinder and said first actuation piston form a pressure chamber that is adapted to be pressurized to cause said first actuating piston to actuate said outer clutch, and said first actuation piston and said common disk carrier form a compensation chamber that is adapted to be pressurized to compensate for excess outer clutch actuation pressure.

2. A dual clutch transmission as set forth in claim 1 that further includes a compensating piston wherein said second actuating piston is disposed between said compensating piston and said common disk carrier such that said common disk carrier and said second actuation piston form a pressure chamber that is adapted to be pressurized to cause said second actuating piston to actuate said inner clutch, and said second actuation piston and said compensating piston form a compensation chamber that is adapted to be pressurized to compensate for excess inner clutch actuation pressure.

3. A dual clutch transmission as set forth in claim 1 wherein said second outer clutch disk carrier is a separate element from said common disk carrier and includes a plurality of axial teeth, and said common clutch disk carrier includes a like plurality of corresponding openings such that the engagement of said teeth within said openings axially locks said second outer clutch carrier to said common disk carrier.

4. A dual clutch transmission as set forth in claim 1 wherein said first actuating piston includes a plurality of circumferentially extending tabs and said common disk carrier includes a like plurality of corresponding openings such that said extending tabs extend though said openings to operatively engage said outer clutch assembly.