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Title:
HYDRAULIC PRESSURE CONTROL DEVICE OF AUTOMATIC TRANSMISSION AND HYDRAULIC PRESSURE CONTROL METHOD
Document Type and Number:
Japanese Patent JP2016125510
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a system which secures favorable responsiveness with respect to a start requirement during a stop of an engine even if there occurs an abnormality in the supply of hydraulic pressure to a starting friction fastening element from a hydraulic pressure source such as an electric oil pump which operates in an engine stop state such as an idle stop time.SOLUTION: A hydraulic pressure control method of an automatic transmission supplies hydraulic pressure generated at a first hydraulic pressure source 6 driven by an engine to a first friction fastening element 60 for obtaining a first gear change ratio when obtaining the starting first gear change ratio during an operation of the engine, and when obtaining the first gear change ratio during a stop of the engine, supplies hydraulic pressure generated at a second hydraulic pressure source 106 which operates irrespective of the engine to the first friction fastening element 60. When there arises a prescribed state during the stop of the engine, the hydraulic pressure control method supplies the hydraulic pressure generated at the second hydraulic pressure source 106 to a second friction fastening element 50 for obtaining a second gear change ratio which is different from the first gear change ratio.SELECTED DRAWING: Figure 3

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Inventors:
SAJI TSUNESHIRO
KAMATA SHINYA
Application Number:
JP2014264103A
Publication Date:
July 11, 2016
Filing Date:
December 26, 2014
Export Citation:
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Assignee:
MAZDA MOTOR
International Classes:
F16H61/00
Domestic Patent References:
JP2009074591A2009-04-09
JP2010209979A2010-09-24
JP2014173705A2014-09-22
JP2008057676A2008-03-13
JP2012030779A2012-02-16
Foreign References:
WO2014141590A12014-09-18
Attorney, Agent or Firm:
Takuji Yamada
Mitsuo Tanaka
Fukuoka Masaaki



 
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