IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0562286
(2014-12-05)
|
등록번호 |
US-9599206
(2017-03-21)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
9 |
초록
▼
A hydrodynamic torque coupling device with lockup clutch is provided that includes an impeller, an axially displaceable turbine-piston, and a stop feature. The turbine-piston includes a turbine-piston shell and a turbine-piston flange. The turbine-piston is axially displaceable relative to the impel
A hydrodynamic torque coupling device with lockup clutch is provided that includes an impeller, an axially displaceable turbine-piston, and a stop feature. The turbine-piston includes a turbine-piston shell and a turbine-piston flange. The turbine-piston is axially displaceable relative to the impeller to move an engagement surface region of the turbine-piston towards and away from an engagement surface region of the impeller for positioning the torque converter respectively into and out of a lockup mode. When the turbine-piston is out of the lockup mode, a fluid passageway connecting a torus chamber to a damper chamber extends between the engagement surface regions and between flow restriction surface regions of the turbine-piston and impeller. At a maximum axial displacement position out of lockup mode, a gap between the engagement surface regions is greater than a gap between the flow restriction surface regions.
대표청구항
▼
1. A hydrokinetic torque coupling device for coupling together a driving shaft and a driven shaft, the hydrokinetic torque coupling device rotatable about a rotational axis and comprising: a casing comprising an impeller shell and a casing shell connected to and non-rotatable relative to the impelle
1. A hydrokinetic torque coupling device for coupling together a driving shaft and a driven shaft, the hydrokinetic torque coupling device rotatable about a rotational axis and comprising: a casing comprising an impeller shell and a casing shell connected to and non-rotatable relative to the impeller shell, the casing being rotatable about the rotational axis and having a damper chamber;torque converter coaxially aligned with and rotatable about the rotational axis, the torque converter having a torus chamber and comprising an impeller rotatable about the rotational axis and comprising the impeller shell having a first engagement surface region and a first flow restriction surface region;an axially displaceable turbine-piston coaxially aligned with and hydrodynamically drivable by the impeller to rotate about the rotational axis, the turbine-piston comprising a turbine-piston shell and a turbine-piston flange having a second engagement surface region and a second flow restriction surface region facing the first engagement surface region and the first flow restriction surface region, respectively; anda stop feature configured to prevent axial displacement of the turbine-piston in adirection away from the impeller beyond a maximum axial displacement position,wherein the turbine-piston is axially displaceable relative to the impeller to move the second engagement surface region towards and away from the first engagement surface region for positioning the hydrokinetic torque coupling device between a lockup mode in which the turbine-piston is mechanically locked to so as to be non-rotatable relative to the impeller and a non-lockup mode in which a fluid passageway extends through a first gap between the first and second engagement surface regions and a second gap between the first and second flow restriction surface regions to place the torus chamber and the damper chamber in fluid communication with one another, andwherein axial displacement of the turbine-piston into the maximum axial displacement position provides the first gap with a greater width than the second gap. 2. The hydrokinetic torque coupling device of claim 1, wherein at least one of the first engagement surface region and the second engagement surface region comprises a friction lining. 3. The hydrokinetic torque coupling device of claim 1, wherein the first flow restriction surface region of the impeller shell is established by an inner surface region of the impeller shell, the impeller shell having a non-uniform thickness at the inner surface region. 4. The hydrokinetic torque coupling device of claim 1, wherein the impeller shell comprises an elbow portion extending at an oblique angle to the rotational axis, wherein the first flow restriction surface region of the impeller shell is established by an inner surface region of the elbow portion, the impeller shell having a non-uniform thickness at the inner surface region. 5. The hydrokinetic torque coupling device of claim 4, wherein the oblique angle is approximately forty-five degrees relative to the rotational axis. 6. The hydrokinetic torque coupling device of claim 1, wherein the turbine-piston flange has a radially outer distal end establishing the second flow restriction surface region. 7. The hydrokinetic torque coupling device of claim 1, wherein the turbine-piston flange is integrally formed with the turbine-piston shell. 8. The hydrokinetic torque coupling device of claim 1, further comprising a stator situated between the impeller and the turbine-piston. 9. The hydrokinetic torque coupling device of claim 1, wherein the first and second flow restriction surface regions extend axially. 10. The hydrokinetic torque coupling device of claim 1, wherein the first and second flow restriction surface regions remain parallel to one another throughout axial displacement of the turbine-piston into and out of the lockup mode. 11. The hydrokinetic torque coupling device of claim 1, wherein: the impeller shell comprises an elbow portion extending at an oblique angle to the rotational axis, wherein the first flow restriction surface region of the impeller shell is established by an inner surface region of the elbow portion, the impeller shell having a non-uniform thickness at the inner surface region;the turbine-piston flange extends radially to terminate at a radially outer distal end establishing the second flow restriction surface region; andthe first and second flow restriction surface regions extend axially. 12. The hydrokinetic torque coupling device of claim 1, wherein the stop feature comprises an output hub. 13. The hydrokinetic torque coupling device of claim 1, further comprising a damper assembly comprising an input part drivenly connected to the turbine-piston and an output part operatively connectable to an output hub. 14. The hydrokinetic torque coupling device of claim 13, wherein the input part of the damper assembly is non-rotatably connected to the turbine-piston and axially movable relative to the output part. 15. The hydrokinetic torque coupling device of claim 13, wherein the damper assembly further comprises circumferential torsional vibration dampers interconnecting the input part rotatably relative to the output part. 16. The hydrokinetic torque coupling device of claim 13, wherein the damper assembly further comprises an intermediate member, a first set of circumferentially extending elastic damping members drivingly coupling the input part to the intermediate member, a second set of circumferentially extending elastic damping members drivingly coupling the intermediate member to the output part, and a centrifugal pendulum oscillator mounted to the intermediate member, and wherein the output part is connected to and non-rotatable relative to the output hub. 17. The hydrokinetic torque coupling device of claim 13, wherein the damper assembly further comprises an intermediate member, a first set of circumferentially extending elastic damping members drivingly coupling the input part to the intermediate member, a second set of circumferentially extending elastic damping members drivingly coupling the intermediate member to the output part, and a spring mass system coupled to the intermediate member, and wherein the output part is connected to and non-rotatable relative to the output hub. 18. The hydrokinetic torque coupling device of claim 1, wherein the turbine-piston is axially displaceable towards an output side of the hydrokinetic torque coupling device in order to frictionally couple the first and second engagement surface regions together and position the hydrokinetic torque coupling device in the lockup mode, and wherein the turbine-piston is axially movable towards an input side of the hydrokinetic torque coupling device so that the first and second engagement surface regions are not frictionally coupled with one another and the hydrokinetic torque coupling device is not in the lockup mode. 19. A method of assembling a hydrokinetic torque coupling device for coupling a driving shaft and a driven shaft together, comprising: providing a torque converter having a torus chamber and comprising an impeller including an impeller shell having a first engagement surface region and a first flow restriction surface region, an axially displaceable turbine-piston comprising a turbine-piston shell and a turbine-piston flange having a second engagement surface region and a second flow restriction surface region facing the first engagement surface region and the first flow restriction surface region, respectively, and a stop feature configured to prevent axial displacement of the turbine-piston in a direction away from the impeller beyond a maximum axial displacement position; andoperatively connecting the torque converter to a casing shell and a damper assembly to establish a damper chamber in which the damper assembly is situated, wherein the turbine-piston is axially displaceable relative to the impeller to move the second engagement surface region towards and away from the first engagement surface region for positioning the hydrokinetic torque coupling device between a lockup mode in which the turbine-piston is mechanically locked to so as to be non-rotatable relative to the impeller and a non-lockup mode in which a fluid passageway extends through a first gap between the first and second engagement surface regions and a second gap between the first and second flow restriction surface regions to place the torus chamber and the damper chamber into fluid communication with one another, and wherein axial displacement of the turbine-piston into the maximum axial displacement position provides the first gap with a greater width than the second gap. 20. A method of operating a hydrokinetic torque coupling device comprising a torque converter, a casing shell, and a damper assembly situated in a damper chamber, the torque converter having a torus chamber and comprising an impeller including an impeller shell having a first engagement surface region and a first flow restriction surface region, an axially displaceable turbine-piston comprising a turbine-piston shell and a turbine-piston flange having a second engagement surface region and a second flow restriction surface region facing the first engagement surface region and the first flow restriction surface region, respectively, and a stop feature configured to prevent axial displacement of the turbine-piston in a direction away from the impeller beyond a maximum axial displacement position, said method comprising: axially displacing the turbine-piston towards the impeller to move the second engagement surface axially towards and into frictional engagement with the first engagement surface to mechanically and non-rotatably lock the turbine-piston to the impeller; andaxially displacing the turbine-piston away from the impeller to move the turbine-piston into the maximum axial displacement position in which a fluid passageway extends through a first gap between the first and second engagement surface regions and a second gap between the first and second flow restriction surface regions to place the torus chamber and the damper chamber into fluid communication with one another, and the first gap is greater in width than the second gap.
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