TORQUE TRANSMITTING SYSTEM WITH TORSIONAL VIBRATION ABSORPTION FOR A POWERTRAIN

• US 20170045112A1
• Filed: 06/28/2016
• Published: 02/16/2017
• Est. Priority Date: 08/14/2015
• Status: Abandoned Application

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Li, Dongxu, Hebbale, Kumaraswamy V.
• Application Number:
  US15/194,596
• Publication Number:
  US 20170045112A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F02D 17/02 Cutting-out cutting-out engines in multiple engine arrangements F02D25/04
• CPC Class Codes: F16F 15/12353 Combinations of dampers, e.g. with multiple plates, multiple spring sets, i.e. complex configurations
• CPC Class Codes: F16F 15/14 using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers compensation of inertia forces F16F15/22; weights for balancing rotating bodies F16F15/32
• CPC Class Codes: F16H 2045/0226 comprising two or more vibration dampers
• CPC Class Codes: F16H 2045/0263 the damper comprising a pendulum
• CPC Class Codes: F16H 45/02 with mechanical clutches for bridging a fluid gearing of the hydrokinetic type control of torque converter lock-up clutches F16H61/14

Abstract

A system for absorbing vibration and transmitting torque from a rotating power source to a rotatable load includes a rotatable driving member configured as an input to be driven by the power source. The system also includes a rotatable driven member configured to be driven by the driving member via a fluid coupling of the driven member to the driving member. The system also has a rotatable component configured as an output to drive the load, and a centrifugal pendulum absorber attached to the rotatable component. A first resilient member connects the driven member to the rotatable component.

Claims

1. A system for absorbing vibration and transmitting torque from a rotating power source to a rotatable load, the system comprising:

a rotatable driving member configured as an input to be driven by the power source;

a rotatable driven member configured to be driven by the driving member via a fluid coupling with the driving member;

a rotatable component configured as an output of the system to drive the rotatable load;

a centrifugal pendulum absorber attached to the rotatable component; and

a first resilient member connecting the driven member to the rotatable component, the driven member thus dynamically absorbing torsional vibration of the rotatable component via the first resilient member.

2. The system of claim 1, further comprising:

a second resilient member connected to the rotatable component;

a selectively engageable clutch engageable to connect the driving member to one of the second resilient member and the rotatable component, thus providing a torque path from the power source to the load via the second resilient member and the rotatable component with the centrifugal pendulum absorber thereon when the clutch is engaged, bypassing the fluid coupling between the driving member and the driven member.

3. The system of claim 2, further comprising:

an electronic controller operatively connected to the clutch and configured to command engagement of the clutch under predetermined operating conditions.

4. The system of claim 2, wherein at least one of the first resilient member and the second resilient member is a coil spring.

5. The system of claim 1, wherein the first resilient member is configured to isolate torsional vibration of the rotatable component at one predetermined vibration frequency of the rotatable component.

6. A torque converter assembly configured for absorbing vibration and transmitting torque from an engine output member to a transmission input member, the torque converter assembly comprising:

a pump portion configured to be driven by the engine output member;

a turbine portion configured to be driven by the pump portion via a fluid coupling with the pump portion;

a rotatable component configured as an output of the torque converter assembly to drive the transmission input member;

a centrifugal pendulum absorber attached to the rotatable component; and

a first resilient member connecting the turbine portion to the rotatable component, the turbine portion thus dynamically absorbing torsional vibration of the rotatable component via the first resilient member.

7. The torque converter assembly of claim 6, wherein the first resilient member is a coil spring.

8. The torque converter assembly of claim 6, wherein the first resilient member is configured to isolate torsional vibration of the rotatable component at one predetermined frequency of the rotatable component.

9. The torque converter assembly of claim 6, further comprising:

a second resilient member connected to the rotatable component;

a selectively engageable clutch engageable to connect the pump portion to one of the second resilient member and the rotatable component, thus providing a torque path from the engine output member to the transmission input member via the second resilient member and the rotatable component with the centrifugal pendulum absorber thereon when the clutch is engaged, bypassing the fluid coupling between the pump portion and the turbine portion.

10. The torque converter assembly of claim 9, further comprising:

an electronic controller operatively connected to the clutch and configured to command engagement of the clutch under predetermined operating conditions.

11. A powertrain comprising:

an engine having a rotatable engine output member;

wherein the engine has a plurality of cylinders and a plurality of operating modes in which different ones of the cylinders are deactivated;

a transmission having a rotatable transmission input member;

a torque converter assembly comprising;

a pump portion connected to and driven by the engine output member;

a turbine portion configured to be driven by the pump portion via a fluid coupling with the pump portion;

a rotatable component connected to and driving the transmission input member;

a centrifugal pendulum absorber attached to the rotatable component; and

a first resilient member connecting the turbine portion to the rotatable component, the turbine portion thus dynamically damping torsional vibration of the rotatable component via the first resilient member; and

wherein the centrifugal pendulum absorber is configured to damp vibration in one of said operating modes.

12. The powertrain of claim 11, wherein the first resilient member is a coil spring.

13. The powertrain of claim 11, wherein the first resilient member is configured to isolate torsional vibration of the rotatable component at a predetermined vibration frequency of the rotatable component.

14. The powertrain of claim 11, further comprising:

a second resilient member connected to the rotatable component.

15. The powertrain of claim 14, further comprising:

a selectively engageable clutch engageable to connect the pump portion to one of the second resilient member and the rotatable component, thus providing a torque path from the engine output member to the transmission input member via the second resilient member and the rotatable component with the centrifugal pendulum absorber thereon when the clutch is engaged, bypassing the fluid coupling between the pump portion and the turbine portion.

16. The powertrain of claim 15, wherein the second resilient member is a coil spring.

17. The powertrain of claim 11, further comprising:

an electronic controller operatively connected to the clutch and configured to command engagement of the clutch under predetermined operating conditions.