Controller for automatic transmission

• US 20010021891A1
• Filed: 02/21/2001
• Published: 09/13/2001
• Est. Priority Date: 02/23/2000
• Status: Active Grant

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Iwase, Masakatsu, Kusafuka, Muneo, Unoki, Masamichi
• Granted Patent: US 6,450,919 B2
• Time in Patent Office: Days
• US Class Current: 701/57
• CPC Class Codes: B60W 2050/0057 Frequency analysis, spectral techniques or transforms
• CPC Class Codes: B60W 40/09 Driving style or behaviour
• CPC Class Codes: F16H 2059/003 Detecting or using driving style of a driver, e.g. for adapting shift schedules
• CPC Class Codes: F16H 2059/183 Rate of change of accelerator position, i.e. pedal or throttle change gradient
• CPC Class Codes: F16H 2061/0081 Fuzzy logic
• CPC Class Codes: F16H 59/18 dependent on the position of the accelerator pedal
• CPC Class Codes: F16H 59/24 dependent on the throttle opening
• 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: Y10T 74/19251 Control mechanism

Abstract

An automatic transmission controller is capable of compensating for both driver type and tendencies of a driver in temporary acceleration, such as in passing. The automatic transmission controller executes a driver type judging subroutine for judging the overall acceleration habits of the driver and classifying the driver as one of a plurality of driver types by monitoring the driving behavior for a predetermined time. The controller also executes a temporary acceleration inclination judging routine for judging the habits of the driver in temporary acceleration by monitoring driving behavior for a period of time shorter than the predetermined time, and executes shift control routines for controlling and changing the shift timing based on the judged driver type and the inclination in temporary acceleration. The controller controls shift timing, taking into account both the driver type and the inclination in temporary acceleration, such as passing.

Claims

1. An automatic transmission controller capable of changing shift timing of a transmission in accordance with acceleration behavior of a driver, comprising:

driver type judging means for judging a driver type in accordance with the acceleration of the driver, as one of a plurality of driver types, by monitoring the driving behavior of the driver over a predetermined period of time;

temporary acceleration inclination judging means for judging the temporary inclination of the driver in temporary acceleration by monitoring said driving behavior for a time shorter than said predetermined period of time; and

shift control means for controlling and changing said shift timing based on the driver type judged by said driver type judging means and the temporary inclination judged by said temporary acceleration inclination judging means.

2. The automatic transmission controller according to

claim 1

, wherein said temporary acceleration inclination judging means judges that the driver has the temporary inclination when the speed of accelerator depression exceeds a predetermined value.

3. The automatic transmission controller according to

claim 2

, wherein said temporary acceleration inclination judging means judges that the driver has the temporary inclination when the speed of accelerator depression exceeds a predetermined value.

4. The automatic transmission controller according to

claim 1

, wherein said shift control means changes the shift timing for a driver type based on the temporary inclination judged by said temporary acceleration inclination judging means.

5. The automatic transmission controller according to

claim 4

, wherein said shift timing for each driver type is stored as a shift map wherein accelerator opening is one parameter and said shift control means computes a compensation value for the accelerator opening based on said temporary inclination, computes a shift map retrieving accelerator opening by adding said compensation value to the actual accelerator opening and changes the shift timing by retrieving said shift map based on the computed shift map retrieving accelerator opening.

6. The automatic transmission controller according to

claim 5

, wherein said driver type judging means judges the driver type as one of at least into two driver types, including a high acceleration inclination type and low acceleration inclination type and said shift control means limits said accelerator opening compensation as the judged driver type goes from the low acceleration inclination type toward the high acceleration inclination type.

7. The automatic transmission controller according to

claim 5

, wherein said driver type judging means judges the driver type as one of at least into two driver types, including a high acceleration inclination type and low acceleration inclination type and said shift control means raises the maximum value of said accelerator opening compensation as the judged driver type goes from the high acceleration inclination type toward the low acceleration inclination type.