Control device and control method for a vehicle

• US 7,263,423 B2
• Filed: 07/28/2004
• Issued: 08/28/2007
• Est. Priority Date: 02/22/2000
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Okada, Takashi, Sakamoto, Hiroshi, Minowa, Toshimichi, Ochi, Tatsuya, Kayano, Mitsuo
• Primary Examiner(s): Tran; Dalena
• Application Number:
  US10/900,358
• Publication Number:
  US 20050005721A1
• Time in Patent Office: 1,126 Days
• Field of Search: 701/51, 701/111, 477/97, 477/107, 477/161, 477/162, 477/40, 477/48, 192/85.F, 192/105.F, 192/221, 743/31, 743/39
• US Class Current: 701/51
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60W 10/02 including control of driveline 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 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 10/11 Stepped gearings
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2510/1015 Input shaft speed, e.g. turbine speed
• CPC Class Codes: B60W 2710/0605 Throttle position
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/1011 Input shaft speed, e.g. turbine speed
• CPC Class Codes: B60W 30/19 Improvement of gear change, e.g. by synchronisation or smoothing gear shift
• CPC Class Codes: F16D 25/0638 with more than two discs, e.g. multiple lamellae
• CPC Class Codes: F16H 2003/0818 comprising means for power-shifting
• CPC Class Codes: F16H 2061/0407 by control of clutch in parallel torque path
• CPC Class Codes: F16H 2061/0422 by an electric machine, e.g. by accelerating or braking the input shaft
• CPC Class Codes: F16H 2061/0429 by torque supply with a clutch in parallel torque path
• CPC Class Codes: F16H 2061/0433 by torque supply with an electric motor
• CPC Class Codes: F16H 2306/54 : Synchronizing engine speed to transmission input speed
• CPC Class Codes: F16H 3/12 : with means for synchronisation not incorporated in the clutches
• CPC Class Codes: F16H 3/126 : using an electric drive
• CPC Class Codes: F16H 61/0403 : Synchronisation before shifting
• CPC Class Codes: F16H 63/502 : for smoothing gear shifts
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y10S 903/903 : having energy storing means, e.g. battery, capacitor
• CPC Class Codes: Y10S 903/919 : Stepped shift
• CPC Class Codes: Y10S 903/945 : Characterized by control of gearing, e.g. control of transmission ratio
• CPC Class Codes: Y10S 903/946 : Characterized by control of driveline clutch
• CPC Class Codes: Y10T 74/19251 : Control mechanism

Abstract

At the time of the change-speed, by correcting the torque reducing portion of an output shaft during the change-speed, the revolution number of an input shaft is controlled on the basis of the corrected torque reduction correcting value. Also, the torque of said input shaft is adjusted at the end of the change-speed on the basis of said torque correcting value.

Claims

1. A method for controlling a transmission, which comprises a first gear pair for transmitting a torque from an input shaft to an output shaft, a first dog clutch which meshes with said first gear pair, a second gear pair for transmitting the torque from said input shaft to said output shaft, a second dog clutch which meshes with said second gear pair, a third gear pair for transmitting the torque from said input shat to said output shaft, and a friction clutch for transmitting the torque to said third gear pair under an application of pressing force, said method comprising:

engaging said friction clutch with said third gear pair;

disengaging said first gear pair and said first dog clutch;

controlling a rotational speed of said input shaft;

engaging said second gear pair with said second dog clutch; and

disengaging said friction clutch from said third gear pair.

2. The method according to claim 1, wherein said controlling step comprises controlling a rotational speed of said input shaft such that a ratio between rotational speeds of said input shaft and said output shaft conform to a change-speed ratio of said second gear pair.

3. The method according to claim 1, further comprising controlling the torque of said input shaft before and after engagement of said second gear pair with said second dog clutch.

4. The method according to claim 1, wherein said step of controlling a rotational speed of said input shaft comprises controlling an electronically controlled throttle valve of an engine which is coupled to said transmission.

5. The method according to claim 1, wherein said step of controlling a rotational speed of said input shaft comprises controlling ignition timing of an engine which is coupled to said transmission.

6. The method according to claim 1, wherein:

at least after disengagement of said first gear pair and said first dog clutch, and before engagement of said second gear pair with said second dog clutch, said friction clutch is engaged to said third gear pair; and

the torque of said input shaft is controlled.

7. The method according to claim 6, wherein after the disengagement of said first gear pair and said first dog clutch, and before said second gear pair engages with said second dog clutch:

said friction clutch is engaged to said third gear pair; and

a rotational speed of said input shaft is controlled such that a ratio between rotational speeds of said input shaft and said output shaft conform to change-speed ratio of said second gear pair.

8. The method according to claim 6, wherein before and after engagement of said second gear pair with said second dog clutch, the torque of said input shaft is controlled.

9. The method according to claim 6, wherein torque of said input shaft is controlled by an electronically controlled throttle valve of an engine which is coupled to said transmission.

10. The method according to claim 6, wherein torque of said input shaft is controlled by ignition timing control of an engine which is coupled to said transmission.

11. The method according to claim 1, wherein:

when said second gear pair and said second dog clutch are disengaged, the torque of said input shaft is controlled.

12. The method according to claim 11, wherein:

after disengagement of said first gear pair and said first dog clutch and before engagement of said second pair with said second dog clutch, said friction clutch is pressed to said third gear pair; and

a rotational speed of said input shaft of the transmission is controlled such that a ratio between rotational speeds of said input shaft and said output shaft conform to a change-speed ratio of said second gear pair.

13. The method according to claim 11, wherein before and after engagement of said second gear pair with said second dog clutch, the torque of said input shaft is controlled.

14. The method according to claim 11, wherein the torque of said input shaft is controlled by controlling an electronically controlled throttle valve of an engine which is coupled to said transmission.

15. The method according to claim 14, wherein the torque of said input shaft is controlled by controlling an electronically controlled throttle valve of an engine which is coupled to said transmission.

16. The method according to claim 11, wherein the torque of said input shaft is controlled by controlling an ignition period control of an engine which is coupled to said transmission.

17. Controlling apparatus for a transmission which controlling apparatus controls a first dog clutch for meshing with a first gear pair which transmits torque from an input shaft to an output shaft, a second dog clutch for meshing with a second gear pair which transmits torque from said input shaft to said output shaft, and a friction clutch for transmitting the torque to a third gear pair which transmits torque from said input shaft to said output shaft under an application of a pressing force;

wherein said controlling apparatus controls said transmission according to the following sequence;

said friction clutch engages with said third gear pair;

said first dog clutch disengages from said first gear pair;

rotational speed of said input shaft is controlled;

said second dog clutch engages with said second gear pair; and

said friction clutch disengages from said third gear pair.

18. The apparatus according to claim 17, wherein:

at least after disengagement of said first gear pair and said first dog clutch, and before engagement of said second gear pair with said second dog clutch, said friction clutch is engaged to said third gear pair; and

the torque of said input shaft is controlled.

19. The apparatus according to claim 17, wherein after the disengagement of said first gear pair and said first dog clutch, and before said second gear pair engages with said second dog clutch:

said friction clutch is engaged to said third gear pair; and

a rotational speed of said input shaft is controlled such that a ratio between rotational speeds of said input shaft and said output shaft conform to change-speed ratio of said second gear pair.

20. The apparatus according to claim 17, wherein before and after engagement of said second gear pair with said second dog clutch, the torque of said input shaft is controlled.

21. The apparatus according to claim 17, wherein torque of said input shaft is controlled by an electronically controlled throttle valve of an engine which is coupled to said transmission.

22. The apparatus according to claim 17, wherein torque of said input shaft is controlled by ignition timing control of an engine which is coupled to said transmission.

23. The apparatus according to claim 17, wherein:

when said second gear pair and said second dog clutch are disengaged, the torque of said input shaft is controlled.

24. The apparatus according to claim 17, wherein:

after disengagement of said first gear pair and said first dog clutch and before engagement of said second pair with said second dog clutch, said friction clutch is pressed to said third gear pair; and

a rotational speed of said input shaft of the transmission is controlled such that a ratio between rotational speeds of said input shaft and said output shaft conform to a change-speed ratio of said second gear pair.

25. The apparatus according to claim 17, wherein before and after engagement of said second gear pair with said second dog clutch, the torque of said input shaft is controlled.

26. The apparatus according to claim 17, wherein the torque of said input shaft is controlled by controlling an ignition period control of an engine which is coupled to said transmission.