Shifting control system for automotive automatic power transmission with neuron computer with refined data sampling and shifting pattern recollection characteristics

• US 5,099,428 A
• Filed: 01/09/1990
• Issued: 03/24/1992
• Est. Priority Date: 01/09/1989
• Status: Expired due to Fees

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Takahashi, Hiroshi
• Primary Examiner(s): Cangialosi, Salvatore
• Application Number:
  US07/462,413
• Time in Patent Office: 805 Days
• Field of Search: 364/424.01, 364/424.1, 364/148, 74/866
• US Class Current: 701/59
• CPC Class Codes: B60W 2050/0057 Frequency analysis, spectral techniques or transforms
• CPC Class Codes: F16H 2061/0075 characterised by a particular control method
• CPC Class Codes: F16H 2061/0081 Fuzzy logic
• CPC Class Codes: F16H 2061/0084 Neural networks
• CPC Class Codes: F16H 61/0213 characterised by the method for generating shift signals
• CPC Class Codes: Y10S 706/90 Fuzzy logic

Abstract

A shift control system for an automatic power transmission incorporates a storage means, responsive to an entered shifting demand, for temporarily storing instantaneous preselected shift control parameter data relative to the entered shifting demand. The control system also includes means for detecting the vehicular driving condition where no shifting demand may occur, for updating driving pattern data which is used for recollection of a driving pattern corresponding to or approximately corresponding to one of a shifting pattern or a schedule so that updating of the driving pattern data may not interfere with recollection of the driving pattern to enable appropriate selection of the transmission speed ratio at any vehicle driving condition.

Claims

1. In an automotive vehicle:

an automatic transmission shiftable in speed ratios;

means for detecting a plurality of predetermined parameters related to driving conditions in which said automotive vehicle is involved and generating a plurality of output signals indicative of said plurality of predetermined parameters detected, respectively;

means for modifying some of said plurality of output signals and generating modified output signals;

switch means manually operable by a driver of said automotive vehicle;

a programmable computer based control unit operatively coupled with said detecting means, said modifying means and said switch means, said programmable computer based control unit being operative according to associatron logic or neuron logic and including

means for forming driving pattern data out of said plurality of output signals and said modified output signals and storing said driving pattern data correlated to an output of said switch means;

means for updating said driving pattern data under a predetermined condition of said automotive vehicle; and

means for recollecting said driving pattern data upon receiving said output signals and said modified output signals which generally represent said driving pattern data; and

means responsive to said driving pattern data recollected for effecting shift control of said automatic transmission.

2. An automotive vehicle as claimed in claim 1, wherein under said predetermined condition of said automotive vehicle, said automotive vehicle is at a standstill.

3. An automotive vehicle as claimed in claim 2, wherein said programmable computer based control unit includes a matrix including a plurality of rows of neurons, said rows corresponding to said output signals and said modified output signals, respectively.