Methods and systems for a driveline dual mass flywheel

• US 9,656,665 B2
• Filed: 02/25/2013
• Issued: 05/23/2017
• Est. Priority Date: 05/04/2012
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: McCallum, James William Loch, Lee, Seung-Hoon, Pietron, Gregory Michael, Gibson, Alex O'Connor, Oshinsky, David
• Primary Examiner(s): Bishop, Erin D
• Application Number:
  US13/776,338
• Publication Number:
  US 20130296124A1
• Time in Patent Office: 1,548 Days
• Field of Search: None
• CPC Class Codes: B60K 2006/268 Electric drive motor starts the engine, i.e. used as starter motor
• CPC Class Codes: B60K 6/26 characterised by the motors or the generators
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/023 Fluid clutches
• CPC Class Codes: B60W 10/026 of lock-up clutches
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 20/40 Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers power-up or power-down of the driveline B60W30/192
• CPC Class Codes: B60W 2510/0233 of torque converter lock-up clutch
• CPC Class Codes: B60W 2510/0275 Clutch torque
• CPC Class Codes: B60W 2510/0638 Engine speed
• CPC Class Codes: B60W 2510/081 Speed
• CPC Class Codes: B60W 2510/24 Energy storage means
• CPC Class Codes: B60W 2710/024 of torque converter lock-up clutch
• CPC Class Codes: B60W 2710/0627 Fuel flow rate
• CPC Class Codes: B60W 2710/0644 Engine speed
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2300/205 related or induced by the engine
• CPC Class Codes: B60Y 2300/58 : Engine torque vibration dampers, e.g. flywheels, dual-mass-springs
• CPC Class Codes: Y10S 903/902 : Prime movers comprising electrical and internal combustion motors
• CPC Class Codes: Y10S 903/93 : Conjoint control of different elements

Abstract

Systems and methods for improving operation of a hybrid vehicle are presented. In one example, compensation is provided for a dual mass flywheel positioned in a vehicle driveline. The approaches may reduce driveline torque disturbances.

Claims

1. A method of adjusting operation of a hybrid vehicle driveline, comprising:

adjusting a torque converter clutch in response to a speed or torque differential across a dual mass flywheel (DMF) positioned in the hybrid vehicle driveline between an engine and a driveline disconnect clutch where the DMF is a driveline component positioned between the engine and the driveline disconnect clutch.

2. The method of claim 1, where adjusting the torque converter clutch includes adjusting a torque converter clutch control command to increase slip across the torque converter clutch.

3. The method of claim 1, where the hybrid vehicle driveline includes a driveline integrated starter/generator.

4. The method of claim 1, where the hybrid vehicle driveline includes an automatic transmission.

5. The method of claim 1, where the speed differential across the DMF is determined from an engine position sensor and a position sensor located in the hybrid vehicle driveline between the DMF and the driveline disconnect clutch.

6. The method of claim 5, where the driveline disconnect clutch is located in the hybrid vehicle driveline between the DMF and a driveline integrated starter/generator.

7. The method of claim 1, where the driveline disconnect clutch selectively disengages the engine from a driveline integrated starter/generator and a transmission.

8. A method of adjusting operation of a hybrid vehicle driveline, comprising:

engaging a driveline disconnect clutch to rotate an engine via a driveline integrated starter/generator (DISG); and

adjusting the DISG in response to a speed or torque differential across a dual mass flywheel (DMF) positioned in the hybrid vehicle driveline between the engine and the driveline disconnect clutch, where the DMF is a driveline component between the engine and the driveline disconnect clutch.

9. The method of claim 8, where the DISG is located in the hybrid vehicle driveline at a location between the driveline disconnect clutch and a transmission.

10. The method of claim 9, where adjusting the DISG includes decreasing torque output from the DISG when a speed on an engine side of the DMF is less than a speed on a driveline disconnect clutch side of the DMF.

11. The method of claim 8, where the DMF transfers engine torque to an automatic transmission or a dual layshaft-dual clutch transmission.

12. The method of claim 8, where a frequency component of an engine speed signal is a basis for adjusting the DISG.

13. The method of claim 12, where the frequency component is determined via a fast Fourier transform (FFT).

14. A hybrid vehicle system, comprising:

an engine;

a dual mass flywheel (DMF) including a first side mechanically coupled to the engine;

a driveline disconnect clutch including a first side mechanically coupled to a second side of the DMF;

a driveline integrated starter\generator (DISG) including a first side coupled to a second side of the driveline disconnect clutch; and

a controller including non-transitory instructions executable to adjust the DISG in response to a speed difference across the DMF.

15. The hybrid vehicle system of claim 14, further comprising a transmission coupled to a second side of the DISG.

16. The hybrid vehicle system of claim 14, where the speed difference provides a position difference between the first side of the DMF and the second side of the DMF as compared to a position of the first side of the DMF and a position of the second side of the DMF when no torque is transferred across the DMF.

17. The hybrid vehicle system of claim 14, further comprising additional executable instructions to increase slip across the driveline disconnect clutch when the speed difference exceeds a threshold speed.

18. The hybrid vehicle system of claim 17, further comprising additional executable instructions to increase slip across a torque converter clutch when the speed difference exceeds the threshold speed.

19. A method of adjusting operation of a vehicle driveline, comprising:

adjusting an actuator in response to engagement of a driveline disconnect clutch to dampen oscillation of a dual mass flywheel (DMF) positioned between an engine and the driveline disconnect clutch, and where the DMF is between the engine and the driveline disconnect clutch.