CONTROL DEVICE FOR VEHICLE HYDRAULIC CONTROL CIRCUIT

• US 20110270483A1
• Filed: 01/09/2009
• Published: 11/03/2011
• Est. Priority Date: 01/09/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ito, Masatoshi, Endo, Hiroatsu
• Granted Patent: US 8,676,433 B2
• Time in Patent Office: Days
• US Class Current: 701/29
• CPC Class Codes: F16H 2061/1228 Fixing failures by repairing failed parts, e.g. loosening a sticking valve
• CPC Class Codes: F16H 2061/1284 the failing part is a sensor
• CPC Class Codes: F16H 59/68 Inputs being a function of gearing status
• CPC Class Codes: F16H 61/12 Detecting malfunction or potential malfunction, e.g. fail safe in control of hydrostatic gearing F16H61/4192; Circumventing or fixing failures
• CPC Class Codes: F16H 61/686 with orbital gears

Abstract

A control device for a vehicle hydraulic control circuit having a hydraulic switch disposed on a hydraulic control circuit of an automatic transmission, includes: a malfunction detecting portion configured to detect a malfunction of the hydraulic switch; and a malfunction removing portion configured to execute an operation for restoring a contact of the hydraulic switch when a malfunction of the hydraulic switch is detected.

Claims

1. A control device for a vehicle hydraulic control circuit having a hydraulic switch disposed on a hydraulic control circuit of an automatic transmission, comprising:

a malfunction detecting portion configured to detect a malfunction of the hydraulic switch; and

a malfunction removing portion configured to execute an operation for restoring a contact of the hydraulic switch when a malfunction of the hydraulic switch is detected.

2. The control device for a vehicle hydraulic control circuit of claim 1, wherein the malfunction removing portion intermittently changes an oil pressure applied to the hydraulic switch to repeat ON/OFF operations of the contact of the hydraulic switch.

7. The control device for a vehicle hydraulic control circuit of claim 1, wherein the malfunction removing portion increases an electric current applied to the hydraulic switch.

8. The control device for a vehicle hydraulic control circuit of claim 2, wherein the malfunction removing portion increases an electric current applied to the hydraulic switch.

9. The control device for a vehicle hydraulic control circuit of claim 1, the malfunction removing portion is implemented at the time of system activation of a vehicle.

10. The control device for a vehicle hydraulic control circuit of claim 2, the malfunction removing portion is implemented at the time of system activation of a vehicle.

11. The control device for a vehicle hydraulic control circuit of claim 7, the malfunction removing portion is implemented at the time of system activation of a vehicle.

12. The control device for a vehicle hydraulic control circuit of claim 8, the malfunction removing portion is implemented at the time of system activation of a vehicle.

13. The control device for a vehicle hydraulic control circuit of claim 1, the malfunction removing portion is implemented after completion of shift of the automatic transmission.

14. The control device for a vehicle hydraulic control circuit of claim 2, the malfunction removing portion is implemented after completion of shift of the automatic transmission.

15. The control device for a vehicle hydraulic control circuit of claim 7, the malfunction removing portion is implemented after completion of shift of the automatic transmission.

16. The control device for a vehicle hydraulic control circuit of claim 8, the malfunction removing portion is implemented after completion of shift of the automatic transmission.

17. The control device for a vehicle hydraulic control circuit of claim 1, including

an actual malfunction confirming portion configured to confirm that the hydraulic switch has an actual malfunction if a malfunction of the hydraulic switch continues despite the operation of the malfunction removing portion, and

a hydraulic switch usage prohibiting portion configured to prohibit use of the hydraulic switch confirmed as having an actual malfunction by the actual malfunction confirming portion.

18. The control device for a vehicle hydraulic control circuit of claim 2, including

an actual malfunction confirming portion configured to confirm that the hydraulic switch has an actual malfunction if a malfunction of the hydraulic switch continues despite the operation of the malfunction removing portion, and

a hydraulic switch usage prohibiting portion configured to prohibit use of the hydraulic switch confirmed as having an actual malfunction by the actual malfunction confirming portion.

19. The control device for a vehicle hydraulic control circuit of claim 7, including

an actual malfunction confirming portion configured to confirm that the hydraulic switch has an actual malfunction if a malfunction of the hydraulic switch continues despite the operation of the malfunction removing portion, and

a hydraulic switch usage prohibiting portion configured to prohibit use of the hydraulic switch confirmed as having an actual malfunction by the actual malfunction confirming portion.

20. The control device for a vehicle hydraulic control circuit of claim 8, including

an actual malfunction confirming portion configured to confirm that the hydraulic switch has an actual malfunction if a malfunction of the hydraulic switch continues despite the operation of the malfunction removing portion, and

a hydraulic switch usage prohibiting portion configured to prohibit use of the hydraulic switch confirmed as having an actual malfunction by the actual malfunction confirming portion.

21. The control device for a vehicle hydraulic control circuit of claim 9, including

an actual malfunction confirming portion configured to confirm that the hydraulic switch has an actual malfunction if a malfunction of the hydraulic switch continues despite the operation of the malfunction removing portion, and

a hydraulic switch usage prohibiting portion configured to prohibit use of the hydraulic switch confirmed as having an actual malfunction by the actual malfunction confirming portion.

22. The control device for a vehicle hydraulic control circuit of claim 10, including

an actual malfunction confirming portion configured to confirm that the hydraulic switch has an actual malfunction if a malfunction of the hydraulic switch continues despite the operation of the malfunction removing portion, and

a hydraulic switch usage prohibiting portion configured to prohibit use of the hydraulic switch confirmed as having an actual malfunction by the actual malfunction confirming portion.

23. The control device for a vehicle hydraulic control circuit of claim 13, including

an actual malfunction confirming portion configured to confirm that the hydraulic switch has an actual malfunction if a malfunction of the hydraulic switch continues despite the operation of the malfunction removing portion, and

a hydraulic switch usage prohibiting portion configured to prohibit use of the hydraulic switch confirmed as having an actual malfunction by the actual malfunction confirming portion.

24. The control device for a vehicle hydraulic control circuit of claim 14, including

an actual malfunction confirming portion configured to confirm that the hydraulic switch has an actual malfunction if a malfunction of the hydraulic switch continues despite the operation of the malfunction removing portion, and

a hydraulic switch usage prohibiting portion configured to prohibit use of the hydraulic switch confirmed as having an actual malfunction by the actual malfunction confirming portion.

3-6. -6. (canceled)