SHIFT CONTROL DEVICE FOR AUTOMATIC TRANSMISSION

Japanese Patent JP2010096224

A

To provide a shift control device for an automatic transmission, enabling to widen a manual shift possible region of the automatic transmission which can perform automatic shift-up in a manual mode, by ensuring appropriate hysteresis between an automatic up-shift line and a down-shift permission line.

The hysteresis between the automatic up-shift line and the down-shift permission line is set to be smaller as an accelerator opening is smaller. This suppresses an extreme reduction of a time interval between down-shift and up-shift in the conditions that the accelerator opening is greater to easily cause hunting. On the other hand, the manual down-shift possible region can widened to the high-rotation side in the conditions that the accelerator opening is smaller to hardly cause hunting, to meet the manual down-shift requirement of a driver in a high vehicle speed range.

JP2749632	INDUSTRIAL APPLICABILITY: Jumping speed change control device for automatic transmission
JPS6444347	METHOD OF CONTROLLING LINE PRESSURE OF CONTINUOUSLY VARIABLE TRANSMISSION
JPS61112850	METHOD FOR CONTROLLING SPEED CHANGE OF AUTOMATIC SPEED CHANGE GEAR FOR VEHICLE

MATSUNAGA HITOSHI
KITAJIMA KEI

JP2008266059A

April 30, 2010

October 15, 2008

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TOYOTA MOTOR CORP

F16H61/10; F16H59/18; F16H59/40; F16H59/42; F16H59/56; F16H59/74; F16H61/686

JPH09264414A	1997-10-07
JPH11294570A	1999-10-29
JP2004257414A	2004-09-16

Patent Business Corporation Ark Patent Office
Yoshiro Kurauchi
Kunitomi Go
Ashikita Tomoharu

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