SHIFTING CONTROL DEVICE FOR VEHICLE

• US 20120022754A1
• Filed: 03/03/2010
• Published: 01/26/2012
• Est. Priority Date: 03/25/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ueno, Koki
• Granted Patent: US 8,494,734 B2
• Time in Patent Office: Days
• US Class Current: 701/58
• CPC Class Codes: F16H 2059/446 Detecting vehicle stop, i.e. the vehicle is at stand still, e.g. for engaging parking lock
• CPC Class Codes: F16H 2061/122 Avoiding failures by using redundant parts
• CPC Class Codes: F16H 2061/1284 the failing part is a sensor
• CPC Class Codes: F16H 2312/12 Parking
• CPC Class Codes: F16H 59/44 dependent on machine speed of the machine, e.g. the vehicle
• CPC Class Codes: F16H 59/48 Inputs being a function of acceleration
• 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 63/3458 with electric actuating means, e.g. shift by wire
• CPC Class Codes: F16H 63/486 Common control of parking locks or brakes in the transmission and other parking brakes, e.g. wheel brakes

Abstract

It is provided a shifting control device for vehicle for electrically controlling a switching of a transmission to a parking range for performing a parking lock in response to an operation by a driver, the shifting control device for vehicle configured to determine the switching to the parking range when the driver performs a predetermined operation for switching to the parking range, based on whether plural vehicle speed signals different in response relative to an actual vehicle speed satisfy a predetermined condition; and the switching to the parking range being determined (i) using a corrected value obtained by correcting a vehicle speed signal having a slower response such that a difference in a vehicle speed based on the vehicle speed signal having the slower response and a vehicle speed signal having a quicker response is suppressed, or (ii) using a corrected value obtained by correcting a predetermined vehicle-speed threshold value associated with the vehicle speed signal having the quicker response such that the slower the response of the vehicle signal having a slower response is, the larger is the corrected value than the corrected value associated with the vehicle speed signal having the quicker response.

Claims

1-11. -11. (canceled)

12. A shifting control device for vehicle for electrically controlling a switching of a transmission to a parking range for performing a parking lock in response to an operation by a driver,

the shifting control device for vehicle configured to determine the switching to the parking range when the driver performs a predetermined operation for switching to the parking range, based on whether plural vehicle speed signals different in response relative to an actual vehicle speed satisfy a predetermined condition;

and

the switching to the parking range being determined (i) using a corrected value obtained by correcting a vehicle speed signal having a slower response such that a difference in a vehicle speed based on the vehicle speed signal having the slower response and a vehicle speed signal having a quicker response is suppressed, or (ii) using a corrected value obtained by correcting a predetermined vehicle-speed threshold value associated with the vehicle speed signal having the quicker response such that the slower the response of the vehicle signal having a slower response is, the larger is the corrected value than the corrected value associated with the vehicle speed signal having the quicker response.

13. The shifting control device for vehicle according to claim 12, wherein the corrected value is determined, based on a delay component in response of the vehicle speed signal having the slower response relative to the actual vehicle speed, such that the slower the response of the vehicle speed signal having the slower response is, the more easily the predetermined condition is satisfied than the vehicle speed signal having the quicker response.

14. The shifting control device for vehicle according to claim 12, wherein the corrected amounts by the corrections are made larger for a larger deceleration of a vehicle in comparison to a smaller deceleration of the vehicle.

15. The shifting control device for vehicle according to claim 13, wherein the corrected amounts by the corrections are made larger for a larger deceleration of a vehicle in comparison to a smaller deceleration of the vehicle.

16. The shifting control device for vehicle according to claim 12, wherein when the vehicle speed signal having the quicker response is abnormal, the switching to the parking range is determined with suppressing the corrected amounts by the corrections and without using the abnormal vehicle speed signal.

17. The shifting control device for vehicle according to claim 13, wherein when the vehicle speed signal having the quicker response is abnormal, the switching to the parking range is determined with suppressing the corrected amounts by the corrections and without using the abnormal vehicle speed signal.

18. The shifting control device for vehicle according to claim 14, wherein when the vehicle speed signal having the quicker response is abnormal, the switching to the parking range is determined with suppressing the corrected amounts by the corrections and without using the abnormal vehicle speed signal.

19. The shifting control device for vehicle according to claim 15, wherein when the vehicle speed signal having the quicker response is abnormal, the switching to the parking range is determined with suppressing the corrected amounts by the corrections and without using the abnormal vehicle speed signal.

20. The shifting control device for vehicle according to claim 12, wherein when the vehicle speed signal having the quicker response is abnormal, the switching to the parking range is determined without performing the corrections and without using the abnormal vehicle speed signal.

21. The shifting control device for vehicle according to claim 13, wherein when the vehicle speed signal having the quicker response is abnormal, the switching to the parking range is determined without performing the corrections and without using the abnormal vehicle speed signal.

22. The shifting control device for vehicle according to claim 14, wherein when the vehicle speed signal having the quicker response is abnormal, the switching to the parking range is determined without performing the corrections and without using the abnormal vehicle speed signal.

23. The shifting control device for vehicle according to claim 15, wherein when the vehicle speed signal having the quicker response is abnormal, the switching to the parking range is determined without performing the corrections and without using the abnormal vehicle speed signal.

25. The shifting control device for vehicle according to claim 12, wherein one of the vehicle speed signals is based on a pulse signal obtained by converting a vehicle-speed correlation value detected by a rotation speed sensor.

27. The shifting control device for vehicle according to claim 12, wherein the vehicle speed signals are based on vehicle-speed correlation values detected by different rotation speed sensors.

29. The shifting control device for vehicle according to claim 12, wherein:

the predetermined condition is a determining condition for determining whether a vehicle is halted based on the vehicle speed signals; and

on performing the predetermined operation for switching to the parking range of the driver, if the predetermined condition is satisfied with the vehicle speed signals falling not more than or being less than the predetermined vehicle-speed threshold value, the switching to the parking range is determined.

30. The shifting control device for vehicle according to claim 12, further including a function to execute switching from a shift range other than the parking range to the parking range and to turn off a vehicle power source, in response to the operation by the driver for switching the vehicle power source from a turn-on state to a turn-off state,

wherein the predetermined operation performed by the driver for switching to the parking range is an operation for switching the vehicle power source from the turn-on state to the turn-off state.

31. The shifting control device for vehicle according to claim 12, wherein:

the switching of the shift range of the transmission is electrically controlled based on a positional signal about an operated position of a shift operation device; and

the predetermined operation performed by the driver for switching to the parking range is an operation of the shift operation device to switch to the operated position for switching the shift range to the parking range in the transmission.

24. A shifting control device for vehicle for electrically controlling a switching of a transmission to a parking range for performing a parking lock in response to an operation by a driver,

the shifting control device for vehicle configured to determine, when the driver performs a predetermined operation for switching to the parking range, the switching to the parking range based on whether a vehicle speed signal satisfies a predetermined condition;

and

the switching to the parking range being determined, of a plurality of vehicle speed signals different in response, based on only the vehicle speed signal having the quicker response when the vehicle speed signal having the quicker response is normal, whereas based on only the vehicle speed signal having the slower response in comparison to the vehicle speed signal having the quicker response when the vehicle speed signal having the quicker response is abnormal.

26. The shifting control device for vehicle according to claim 24, wherein one of the vehicle speed signals is based on a pulse signal obtained by converting a vehicle-speed correlation value detected by a rotation speed sensor.

28. The shifting control device for vehicle according to claim 24, wherein the vehicle speed signals are based on vehicle-speed correlation values detected by different rotation speed sensors.