Control device having compensation means for changing predetermined throttle pedalling speeds of automatic transmission for vehicle

• US 5,499,953 A
• Filed: 05/06/1994
• Issued: 03/19/1996
• Est. Priority Date: 06/28/1993
• Status: Expired due to Fees

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Hayasaki, Koichi
• Primary Examiner(s): Ta, Khoi Q.
• Application Number:
  US08/238,942
• Time in Patent Office: 683 Days
• Field of Search: 477/120, 477/121, 477/904, 477/905
• US Class Current: 477/120
• CPC Class Codes: F16H 2061/0227 Shift map selection, i.e. methods for controlling selection between different shift maps, e.g. to initiate switch to a map for up-hill driving
• CPC Class Codes: F16H 59/141 of rate of change of torque or torque demand
• CPC Class Codes: F16H 59/18 dependent on the position of the accelerator pedal
• CPC Class Codes: F16H 59/42 Input shaft speed
• CPC Class Codes: F16H 59/48 Inputs being a function of acceleration
• CPC Class Codes: F16H 61/0213 characterised by the method for generating shift signals
• CPC Class Codes: Y10S 477/905 Acceleration of throttle signal

Abstract

A control device of an automatic transmission capable of controlling the operation so as to suit the gearshift operation to a driver'"'"'s pedalling operation for acceleration and deceleration. The control device selects a gearshift pattern corresponding to a result obtained by comparing a displacement per unit time of an accelerator pedal with a predetermined displacement per unit time of the accelerator pedal. Further, the device includes a microcomputer to monitor the driver'"'"'s pedalling operation for acceleration and deceleration when the gearshift is carried out and to compensate the predetermined displacement per unit time of the accelerator pedal in such a manner that the driver'"'"'s unnatural pedalling operation would not be required.

Claims

1. A device for controlling an automatic transmission for a vehicle, said device comprising, in combination:

selecting means for selecting at least one gearshift pattern from a plurality of gearshift patterns corresponding to a result obtained by comparing an actual pedalling speed with at least one of a plurality of predetermined pedalling speeds;

monitoring means for monitoring a driver'"'"'s pedalling operation for acceleration or deceleration when a gearshift in said automatic transmission is carried out; and

compensating means for compensating said predetermined pedalling speeds in response to said monitoring means.

2. A device for controlling operations of an automatic transmission as claimed in claim 1, wherein said compensating means compensates said predetermined pedalling speeds when a downshift change in said automatic transmission is carried out by said driver'"'"'s pressing on said accelerator pedal.

3. A device for controlling operations of an automatic transmission as claimed in claim 1, wherein said monitoring means detect said driver'"'"'s pedalling for deceleration in a period between a time to generate a command for said gearshift and a time to finish said gearshift and then said compensating means compensate said predetermined pedalling speeds by a predetermined value X so as to decrease a tendency of a downshift change of said automatic transmission.

4. A device for controlling operations of an automatic transmission as claimed in claim 1, wherein said monitoring means detect at least one of said driver'"'"'s pedalling for deceleration at a speed more than said predetermined pedalling speed in a predetermined time period from after a finish of said gearshift and said driver'"'"'s pedalling for deceleration prior to a predetermined time, and wherein then said compensating means compensate said predetermined pedalling speeds by a predetermined value Y so as to decrease a tendency of a downshift of said automatic transmission.

5. A device for controlling operations of an automatic transmission as claimed in claim 1, wherein said monitoring means detect at least one of said driver'"'"'s pedalling for deceleration at a speed less than said predetermined pedalling speed in said predetermined time period after a finish of said gearshift and said driver'"'"'s pedalling for deceleration in excess of said predetermined time and then said compensating means compensate said predetermined pedalling speeds by a predetermined value Z so as to decrease said tendency of said downshift of said automatic transmission.

6. A device for controlling operations of an automatic transmission as claimed in claim 5, wherein the relationship between said predetermined values X, Y and Z is that X is more than Y and that Y is more than Z.

7. A device for controlling operations of an automatic transmission as claimed in claim 1, wherein said monitoring means detect at least one of said driver'"'"'s pedalling for acceleration at a speed more than said predetermined pedalling speed in a predetermined time period from a after a finish of said gearshift and said driver'"'"'s pedalling for acceleration prior to a predetermined time and wherein said monitoring means detect said driver'"'"'s pedalling for acceleration is maintained in a time period more than a predetermined second time period and then said compensating means compensate said predetermined pedalling speeds by a predetermined value α

so as to increase a tendency of a downshift of said automatic transmission.

8. A device for controlling operations of an automatic transmission as claimed in claim 1, wherein said monitoring means detect at least one of said driver'"'"'s pedalling for acceleration at a speed more than said predetermined pedalling speed in a predetermined time first period from a after a finish of said gearshift and said driver'"'"'s pedalling for acceleration prior to a predetermined time and wherein said monitoring means detect said driver'"'"'s pedalling for acceleration being canceled within a predetermined second period and then said compensating means compensate said pedalling speeds by a predetermined value β

so as to increase a tendency of a downshift of said automatic transmission.

9. A device for controlling operations of an automatic transmission as claimed in claim 8, wherein said monitoring means detect at least one of said driver'"'"'s pedalling for acceleration at a speed less than said predetermined pedalling speed-in a predetermined time period from a after a finish of said gearshift and said driver'"'"'s pedalling for acceleration in excess of a predetermined time and then said compensating means compensate said predetermined pedalling speeds by a predetermined value γ

so as to increase said tendency of said downshift of said automatic transmission.

10. A device for controlling operations of an automatic transmission as claimed in claim 7, wherein the relationship between said predetermined values α

, β and

γ

is that α

is more than β and

that β

is more than γ

.

11. A device for controlling operations of an automatic transmission as claimed in claim 3, wherein said monitoring means detect at least one of said driver'"'"'s pedalling for deceleration at a speed more than said pedalling speed in a predetermined time period from a after a finish of said gearshift and said driver'"'"'s pedalling for deceleration prior to a predetermined time and then said compensation means compensate said predetermined pedalling speeds by a predetermined value Y so as to decrease a tendency of a downshift of said automatic transmission.

12. A device for controlling operations of an automatic transmission as claimed in claim 7, wherein said monitoring means detect at least one of said driver'"'"'s pedalling for acceleration at a speed more than said predetermined pedalling speed in a predetermined time first period from a after a finish of said gearshift and said driver'"'"'s pedalling for acceleration prior to a predetermined time and wherein said monitoring means detect said driver'"'"'s pedalling for acceleration being cancelled within a predetermined second period and then said compensating means compensate said predetermined pedalling speeds by a predetermined value β

so as to increase a tendency of a downshift of said automatic transmission.

13. A device for controlling operations of an automatic transmission as claimed in claim 8, wherein the relationship between said predetermined values α

, β and

γ

is that α

is more than β and

the β

is more than γ

.

14. A device for controlling operations of an automatic transmission as claimed in claim 9, wherein the relationship between said predetermined values α

, β and

γ

is that α

is more than β and

the β

is more than γ

.