Title:
SHIFT CONTROL SYSTEM FOR VEHICULAR AUTOMATIC TRANSMISSION
Document Type and Number:
Japanese Patent JP3723103
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a shift control system for a vehicular automatic transmission that has sufficient robustness against a disturbance such as braking of a vehicle even without high precision control equipment in clutch-to-clutch downshift control during coasting travel.
SOLUTION: A slight driving state controlling means 134 controls or increases engine speed NE according to an actual input/output speed difference NSLIP in a clutch-to-clutch downshift performed during coasting travel, to thus maintain a slight driving state of the vehicle during the clutch-to-clutch downshift. The clutch-to-clutch downshift control during coasting travel in that slight driving state reduces torque fluctuation to provide high hydraulic control precision of a brake B1 and a clutch C1 related to the shift, so that even without high- cost equipment with high control precision, sufficient robustness can be obtained against a disturbance such as braking of the vehicle.
Inventors:
Kazuyuki Watanabe
Toshimitsu Sato
Atsushi Ayabe
Shinji Kato
Naoyuki Sakamoto
Hiromichi Kimura
Noboru Shibata
Mitsuhiro Nakamura
Hideaki Ogasawara
Toshimitsu Sato
Atsushi Ayabe
Shinji Kato
Naoyuki Sakamoto
Hiromichi Kimura
Noboru Shibata
Mitsuhiro Nakamura
Hideaki Ogasawara
Application Number:
JP2001234154A
Publication Date:
December 07, 2005
Filing Date:
August 01, 2001
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
Aisin AW Co., Ltd.
Aisin AW Co., Ltd.
International Classes:
B60W10/04; B60W10/06; B60W10/10; B60W10/11; F02D29/00; F16H61/04; (IPC1-7): F02D29/00; B60K41/00; B60K41/06; F16H61/04
Domestic Patent References:
| JP10047100A | ||||
| JP6001163A | ||||
| JP11036909A | ||||
| JP9195808A | ||||
| JP1089114A | ||||
| JP6017671A | ||||
| JP6017672A | ||||
| JP5229368A |
Attorney, Agent or Firm:
Haruyuki Ikeda