Jatco Corporation

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Yukinobu Sakakibara

Nobuhiko Morifuji

Mitsuki Ishizuka

Tomoaki Kabe

Hiromu Ogino

Yuki Ono

Nobuhide Kato

Keisuke Ichikawa

Hisao Nakanishi

Takahiro Nakata

Noritaka Aoyama

Masataka Ohtsuka

Azusa Shimoda

Ken Hirashita

Hiromasa Masuda

A transmission control device controls a CVT installed in a vehicle. The device has, as modes for the CVT, a CVT mode Mfor changing a transmission gear ratio steplessly based on the operating state of the vehicle, and a stepped transmission mode Mfor changing the transmission gear ratio stepwise based on the operating state of the vehicle. The device includes a transmission mode switching control unit (controller)for controlling switching between the CVT mode Mand the stepped transmission mode Mbased on an actual accelerator opening. The transmission mode switching control unit (controller)performs switching from the CVT mode Mto the stepped transmission mode M, if the actual accelerator opening reaches or exceeds a first threshold value Tset in a plurality of stages so as to increase stepwise in accordance with an increase in a vehicle speed.

Transmission control device

In a shift control apparatus of a continuously variable transmission (CVT) configured to steplessly vary a torque, the control apparatus employs an acceleration intention determination section for determining the presence or absence of a driver's acceleration intention, a shift mode setting section for setting a shift-control mode from a normal mode to an acceleration mode in the presence of the driver's acceleration intention, a shift speed setting section for setting a shift speed based on a target transmission ratio and a vehicle speed, and a shift control section for controlling a shift of the CVT. Also provided is a shift speed correction section for correcting the shift speed for an initial downshift in the acceleration mode to a shift speed slower than the shift speed set by the shift speed setting section, only when a demanded degree of the driver's acceleration intention is small.

Shift control apparatus of continuously variable transmission

A shift control apparatus for a continuously variable transmission includes: a target transmission gear ratio setting section configured to set a target transmission gear ratio with reference to a map based on an accelerator opening degree and a vehicle speed; a shift control section configured to control a shift of the continuously variable transmission based on the target transmission gear ratio; and a downshift restricting section configured to judge whether or not a restriction of the downshift is needed based on at least one of a variation amount of the accelerator opening degree and an accelerator depression speed, and to perform the restriction of the downshift when the downshift restricting section judges that the restriction of the downshift is needed, irrespective of a variation of the accelerator opening degree inputted to the target transmission gear ratio setting section.

Shift control apparatus for continuously variable transmission

A shift control apparatus for continuously variable transmission includes: a pseudo accelerator opening degree generating section configured to generate a pseudo accelerator opening degree larger than the actual accelerator opening degree when the actual accelerator opening degree is decreased when the judging section judges that the vehicle runs the uphill; the target transmission gear ratio setting section being configured to set the target transmission gear ratio by the pseudo accelerator opening degree when the pseudo accelerator opening degree is inputted, and the shift control section being configured to control the shift toward the target transmission gear ratio set based on the pseudo accelerator opening degree and the vehicle speed when the pseudo accelerator opening degree is generated, and to control the shift toward the target transmission gear ratio set based on the actual accelerator opening degree and the vehicle speed when the pseudo accelerator opening degree is not generated.

Growing community of inventors

Gamagori, Japan

Yukinobu Sakakibara