Vehicle transmission control device

Patent metadata

Field	Value
Publication number	US-9410620-B2
Application number	US-201214439177-A
Country	US
Kind code	B2
Filing date	Nov 16, 2012
Priority date	Nov 16, 2012
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

An automatic transmission shifting control including: a shifting target value calculating portion setting shifting target values, torque of a rotary-member on the output shaft side, and rate of change of rotating speed of a rotary-member on the input shaft side; a manipulated calculating portion setting manipulated amounts, a torque of the rotary-member on the input shaft side, a torque capacity of one coupling device engaging for a transmission shifting-action, and torque capacity of other coupling devices releasing the shifting-action; a torque assignment ratio calculating portion setting torque assignment ratios to transfer through the respective coupling devices to engage and release the shifting-action; when a second-shifting-action is required during a preceding first-shifting-action according to a first-shifting-model, the manipulated calculating portion switching the first-shifting-model corresponding to the first-shifting-action to a second-shifting-model corresponding to the second-shifting-action, implementing a transmission shifting control for the second-shifting-action according to the second-shifting-model.

First claim

The invention claimed:

1. A transmission shifting control apparatus for a vehicle including an automatic transmission which comprises a plurality of coupling devices for transmitting a rotary motion and a torque between an input shaft provided to receive a drive force from a drive power source and an output shaft provided to transmit the drive force to drive wheels, and which is configured to be shifted with concurrently performed engaging and releasing actions of the respective coupling devices, said control apparatus being configured to implement a shifting control of said automatic transmission according to a predetermined shifting model for determining manipulated amounts to establish shifting target values, the control apparatus comprising:
a shifting target value calculating portion configured to set, as said shifting target values, a torque of a rotary member disposed on the side of said output shaft, and a rate of change of a rotating speed of a rotary member disposed on the side of said input shaft;
a manipulated amount calculating portion configured to set, as said manipulated amounts, a torque of the rotary member disposed on the side of said input shaft, a torque capacity of one of the coupling devices which is to be engaged for a shifting action of said automatic transmission, and a torque capacity of the other of the coupling devices which is to be released for the shifting action; and
a torque assignment ratio calculating portion configured to set torque assignment ratios which are ratios of torques to be transferred through the respective coupling devices to be engaged and released for the shifting action,
and when a second shifting action of the automatic transmission is required to be performed, during a preceding first shifting action according to a first shifting model, said manipulated amount calculating portion switching said first shifting model corresponding to said first shifting action to a second shifting model corresponding to said second shifting action, to implement a shifting control of the automatic transmission for performing said second shifting action according to said second shifting model.

2. The transmission shifting control apparatus according to claim 1 , wherein said manipulated amount calculating portion does not switch said first shifting model to said second shifting model, where the second shifting action is required during said first shifting action while said torque assignment ratios are being changed.

3. The transmission shifting control apparatus according to claim 2 , wherein when said second shifting action is required to be performed, during said first shifting action while said torque assignment ratios are being changed, said manipulated amount calculating portion switches said first shifting model to said second shifting model after changes of said torque assignment ratios are terminated.

4. The transmission shifting control apparatus according to claim 2 , wherein said torque assignment ratios are returned back to original values prior to a moment of initiation of their changes for said first shifting action during which said second shifting action is required to be performed, said first shifting model corresponding to the first shifting action is switched to said second shifting model corresponding to the second shifting action after the torque assignment ratios have been returned to said original values.

5. The transmission shifting control apparatus according to claim 1 , wherein said manipulated amount calculating portion is operated according to said shifting model which is formulated to calculate said manipulated amounts on the basis of said shifting target values, and according to motion equations of the automatic transmission including said shifting target values and said manipulated amounts, and a relationship representative of said torque assignment ratios.

Assignees

• TSUGE Shogo
• Masunaga Seiji
• Hasegawa Yoshio
• Ota Keisuke
• Toyota Motor Co Ltd

Inventors

• TSUGE Shogo
• Masunaga Seiji
• Hasegawa Yoshio
• Ota Keisuke

Classifications

• F16H2061/0093

  using models to estimate the state of the controlled object · CPC title

• F16H2061/0477

  by suppression of excessive engine flare or turbine racing during shift transition · CPC title

• F16H61/0437 Primary

  by using electrical signals (F16H61/0403 and F16H61/061 take precedence) · CPC title