HYDRAULIC CONTROL SYSTEM FOR AUTOMATIC TRANSMISSION

WIPO Patent Application WO/2007/077664

A1

Provided is a hydraulic control system comprising a solenoid valve (SR) for outputting a signal pressure in failure but not at a normal time, and a first clutch apply relay valve (34) adapted to be switched to a normal position (at a righthand half position in Fig. 5) or a failure position (at a lefthand half position in Fig. 5) on the basis of that signal pressure. In failure, the first clutch apply relay valve (34) is switched to the fail position so that a fail-safe control is performed. The first clutch apply relay valve (34) inputs, when at the normal position, an engaging pressure of a hydraulic servo (51) from a linear solenoid valve (SL1) so that it is locked at the normal position. While a first clutch (C-1) is being applied, a B-2 apply control valve (35) can be switched by the signal pressure of the solenoid valve (SR).

JP2006292110	CONTROL UNIT FOR VEHICLE
WO/1985/003126	FAILURE DETECTION SYSTEM FOR GEARED ROTARY ACTUATOR MECHANISM
JPS63186058	CONTROL DEVICE OF HYDRAULIC TYPE TRANSMISSION FOR VEHICLE

SATO NOBUHIRO (JP)
YAMAGUCHI TETSUYA (JP)
NODA KAZUYUKI (JP)
FUKATSU AKIRA (JP)
IWASE MIKIO (JP)
NOZAKI KAZUTOSHI (JP)
HONDA ATSUSHI (JP)

PCT/JP2006/321209

July 12, 2007

October 25, 2006

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AISIN AW CO (JP)
TOYOTA MOTOR CO LTD (JP)
SATO NOBUHIRO (JP)
YAMAGUCHI TETSUYA (JP)
NODA KAZUYUKI (JP)
FUKATSU AKIRA (JP)
IWASE MIKIO (JP)
NOZAKI KAZUTOSHI (JP)
HONDA ATSUSHI (JP)

F16H61/12; F16H61/68; F16H61/684; F16H59/74; F16H61/686

JP2005265101A	2005-09-29
JP2001280456A	2001-10-10
JPH0842681A	1996-02-16
JP2000240776A	2000-09-05

CHIKASHIMA, Kazuo (9-7 Shibaura 1-chome, Minato-k, Tokyo 23, JP)

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