Hydrokinetic torque coupling device having turbine-piston lockup clutch with drive-clutch component, and related method

Patent metadata

Field	Value
Publication number	US-9765872-B2
Application number	US-201414522361-A
Country	US
Kind code	B2
Filing date	Oct 23, 2014
Priority date	Oct 23, 2014
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A hydrokinetic torque coupling device includes an impeller, a casing having a first engagement surface, a damper assembly, a turbine-piston and a drive-clutch component non-moveably attached to the turbine-piston and having a second engagement surface. The turbine-piston is axially displaceable relative to the casing to move the second engagement surface axially towards and away from the first engagement surface for positioning the hydrokinetic torque coupling device respectively into and out of a lockup mode in which the first and second engagement surfaces frictionally interlock with one another to mechanically lock the casing non-rotatably relative to the input part of the damper assembly. The drive-clutch component is configured to engage and rotationally drive a torsional vibration damper.

First claim

What is claimed is:

1. A hydrokinetic torque coupling device for coupling a driving shaft and a driven shaft together, comprising:
an impeller comprising an impeller shell and a plurality of impeller blades;
a casing comprising the impeller shell and a cover shell connected to the impeller shell, the casing having a first engagement surface, wherein the first engagement surface comprises an inner surface of the cover shell;
an axially displaceable turbine-piston coaxially aligned with and hydrodynamically drivable by the impeller, the turbine-piston comprising a turbine-piston shell and a plurality of turbine blades attached to the turbine-piston shell;
a drive-clutch component affixed to the turbine-piston shell and comprising a drive portion and a clutch portion, the clutch portion having a second engagement surface movable axially toward and away from the first engagement surface, the drive portion being configured to engage and rotationally drive a torsional vibration damper,
the turbine-piston is axially displaceable relative to the casing to move the second engagement surface axially towards and away from the first engagement surface for positioning the hydrokinetic torque coupling device respectively into and out of a lockup mode in which the turbine-piston is mechanically locked to and non-rotatable relative to the casing.

2. The hydrokinetic torque coupling device of claim 1 , further comprising an output hub and the torsional vibration damper; wherein the torsional vibration damper interconnects the drive-clutch component and the output hub; and wherein the drive-clutch component is axially movable relative to the torsional vibration damper.

3. The hydrokinetic torque coupling device of claim 2 , wherein the torsional vibration damper comprises an intermediate member, a first set of circumferentially extending elastic damping members drivingly coupling the drive-clutch component to the intermediate member, a driven member connected to and non-rotatable relative to the output hub, a second set of circumferentially extending elastic damping members drivingly coupling the intermediate member to the driven member, and a centrifugal pendulum oscillator mounted to the intermediate member.

4. The hydrokinetic torque coupling device of claim 2 , wherein the torsional vibration damper comprises an intermediate member, a first set of circumferentially extending elastic damping members drivingly coupling the drive-clutch component to the intermediate member, a driven member connected to and non-rotatable relative to the output hub, a second set of circumferentially extending elastic damping members drivingly coupling the intermediate member to the driven member, and a spring mass system coupled to the intermediate member.

5. The hydrokinetic torque coupling device of claim 2 , wherein the torsional vibration damper comprises: a driven member non-rotatably connected to the output hub; and circumferential elastic damping members rotatably interconnecting the drive-clutch component to the driven member.

6. The hydrokinetic torque coupling device of claim 5 , wherein the torsional vibration damper further comprises an input member non-rotatably connected to the drive portion of the drive-clutch component and operatively connected to the driven member through the circumferential elastic damping members so as to rotatably interconnect the drive-clutch component to the driven member.

7. The hydrokinetic torque coupling device of claim 6 , wherein the drive-clutch component is axially moveable relative to the input member of the torsional vibration damper.

8. The hydrokinetic torque coupling device of claim 7 , wherein the drive portion of the drive-clutch component is provided with axially extending inner splines facing the torsional vibration damper, wherein the input member of the torsional vibration damper is formed with teeth on an outer peripheral surface thereof, and wherein the teeth are complementary to the splines of the drive-clutch component and configured to non-rotatably and axially slidably engage the splines of the drive-clutch component.

9. The hydrokinetic torque coupling device of claim 5 , wherein the drive-clutch component further comprises a plurality of driving tabs drivingly engaging the damping members; and wherein the driven member of the torsional vibration damper has a plurality of driven tabs drivingly engaging the damping members so that the damping members are disposed between the driven tabs of the driven member and the driving tabs of the drive-clutch component.

10. The hydrokinetic torque coupling device of claim 1 , wherein the drive portion of the drive-clutch component is affixed to the turbine-piston shell.

11. A method of assembling a hydrokinetic torque coupling device for coupling a driving shaft and a driven shaft together, comprising the steps of:
providing a torque converter comprising an impeller including an impeller shell and impeller blades, and an axially displaceable turbine-piston including a turbine-piston shell and a plurality of turbine blades attached to the turbine-piston shell;
providing a drive-clutch component comprising a drive portion and a clutch portion;
non-moveably attaching the drive portion of the drive-clutch component to the turbine-piston shell;
mounting a torsional vibration damper so that the drive-clutch component drivingly engages the torsional vibration damper; and
non-moveably attaching a cover shell having a first engagement surface to the impeller shell so as to form a casing enclosing the torque converter, the drive-clutch component, and the torsional vibration damper and so that the first engagement surface faces a second engagement surface of the clutch portion of the drive-clutch component, the second engagement surface being moveable axially towards and away from the first engagement surface for positioning the hydrokinetic torque coupling device respectively into and out of a lockup mode in which the turbine-piston is mechanically locked to and non-rotatable relative to the casing.

12. The method of claim 11 , wherein the step of non-movably attaching the drive portion of the drive-clutch component to the turbine-piston shell comprises securing the drive portion to the turbine-piston shell via an interference fit.

13. The method of claim 12 , wherein the torsional vibration damper comprises a driven member and circumferential elastic damping members; and wherein the method further comprising the steps of: non-rotatably connecting the driven member to the output hub; and rotatably interconnecting the drive-clutch component to the driven member with the elastic damping members.

14. The method of claim 13 , wherein the torsional vibration damper further comprises an input member non-rotatably connected to the drive portion of the drive-clutch component and operatively connected to the driven member through the circumferential elastic damping members so as to rotatably interconnect the drive-clutch component to the driven member.

15. The method of claim 14 , wherein the drive portion of the drive-clutch component is provided with axially extending inner splines facing the torsional vibration damper, wherein the input member of the torsional vibration damper is formed with teeth on an outer peripheral surface thereof, wherein the teeth are complementary to the splines of the drive-clutch component; and wherein the torsional vibration damper is mounted to the drive-clutch component so that the teeth of the input member of the torsional vibration damper non-rotatably and axially slidably engage the splines of the drive-clutch component.

16

Assignees

• Valeo Embrayages

Inventors

• Werthman David
• Lee Sungchul
• Bacher Michel
• Depraete Alexandre

Classifications

• F16H2045/0289

  Details of friction surfaces of the lock-up clutch · CPC title

• F16H2045/0294

  Single disk type lock-up clutch, i.e. using a single disc engaged between friction members · CPC title

• F16H45/02 Primary

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title

• F16H2045/0226

  comprising two or more vibration dampers · CPC title

• F16H2045/0278

  comprising only two co-acting friction surfaces · CPC title