Title:
VEHICULAR AUTOMATIC TRANSMISSION CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3846911
Kind Code:
B2
Abstract:
PURPOSE: To provide a vehicular automatic transmission control device for converging input shaft rotational frequency extremely rapidly within a specific range and improving the riding comfortableness agreeably.
CONSTITUTION: Processing starts when an up shift is instructed. First, input shaft torque Tt of an automatic transmission is estimated (101), and initial duty d1(n) of an electromagnetic valve for driving a clutch of the automatic gear changer by a formula d1(n)=dr(n-1)+g.(Tt-Ttr(n-1)) is operated (103). The duty ratio d of the electromagnetic valve is feed back controlled such that rate of change Δ Nt of the input shaft rotational frequency Nt of the automatic gear changer corresponds to a desired value in present routine (107-113) and dr(n-1), Ttr-(n-1) is a value of d, Tt stored when a previous ΔNt corresponded to the desired value (115). The g is a factor sequentially learned and corrected (117). Since the above formula is based on an agreeable line relationship among the Δ Nt, Tt, and transmission torque of the clutch (proportional to d), d is rapidly converged.
Inventors:
Yoshifumi Kato
Masami Fujitsuna
Ichiro Yamauchi
Masami Fujitsuna
Ichiro Yamauchi
Application Number:
JP22968594A
Publication Date:
November 15, 2006
Filing Date:
September 26, 1994
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F16H61/04; F16H61/02; F16H61/08; (IPC1-7): F16H61/04; //F16H59:14; F16H59:42
Domestic Patent References:
| JP5332440A | ||||
| JP5203025A | ||||
| JP5231511A |
Attorney, Agent or Firm:
Hirohiko Usui
Daito Kato
Takashi Ito
Daito Kato
Takashi Ito
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