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Patent Searching and Data


Title:
HYDRAULIC CONTROL DEVICE FOR VEHICLE
Document Type and Number:
Japanese Patent JP2011043203
Kind Code:
A
Abstract:

To provide a hydraulic control device for a vehicle improving responsiveness of switching of a lock-up clutch.

In a case where a spool valve element 120 is on the off-position side, a switching port 126 is communicated with a drain port 128 through a switching hydraulic chamber 129. In a case where the spool valve element 120 is on the on-position side, the switching port 126 is communicated with a second input port 114 through the switching hydraulic chamber 129. In a case where a vehicle is quickly braked (quickly stopped) while the lock-up clutch 26 is engaged, a lock-up relay valve 72 is quickly switched to the off-position to release the lock-up clutch 26. Fall of engine speed is restricted, and lowering of drivability is restricted.


Inventors:
AOYAMA TOSHIHIRO
Application Number:
JP2009191418A
Publication Date:
March 03, 2011
Filing Date:
August 20, 2009
Export Citation:
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Assignee:
TOYOTA MOTOR CORP
International Classes:
F16H61/14; F16H61/00
Domestic Patent References:
JP2004316665A2004-11-11
JPS5990655U1984-06-19
JPH0238754A1990-02-08
JPH03239867A1991-10-25
JPH0626566A1994-02-01
Attorney, Agent or Firm:
Haruyuki Ikeda
Kojiro Ikeda