Title:
CONTROL DEVICE FOR AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2017/159204
Kind Code:
A1
Abstract:
This control device for an automatic transmission comprises a control unit (10) that controls a continuously variable transmission mechanism (CVT). The control unit (10) has: a target transmission ratio calculation unit (101) that calculates a target transmission ratio on the basis of a traveling state; a feedback control unit (103) that provides feedback control on the basis of an actual value, said actual value expressing the state of the continuously variable transmission mechanism (CVT); a phase compensation unit (104) that, on the basis of the traveling state, performs phase lead compensation on a command value from the feedback control, said phase lead compensation being based on a prescribed phase lead amount; and a phase compensation control unit (109) that sets the prescribed phase lead amount such that the prescribed phase lead amount is greater than a first phase lead amount, with which a controllability limit would be reached, said controllability limit being the limit of the possibility of suppressing the resonance of a power transmission pathway between a power source and a drive wheel, and such that the prescribed phase lead amount is less than a second phase lead amount, with which a stability limit would be reached, said stability limit being the limit of the possibility of avoiding divergence of the feedback control unit (103).
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Inventors:
OKAHARA KEN (JP)
Application Number:
PCT/JP2017/005799
Publication Date:
September 21, 2017
Filing Date:
February 17, 2017
Export Citation:
Assignee:
JATCO LTD (JP)
International Classes:
F16H61/04; F16H61/66
Foreign References:
| JP2002081538A | 2002-03-22 | |||
| JP2000027983A | 2000-01-25 | |||
| JPH10252880A | 1998-09-22 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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