Nissan Motor Company Limited

Jatco Corporation

Sho Okutani

Makoto Komatsu

Takashi Koguchi

Hiroyasu Tanaka

Takuichiro Inoue

Hideshi Wakayama

Toshiaki Noda

Yuuji Nagase

Takashi Nobukawa

Jongkeun Lim

Kenji Hishida

A vehicle has an engine () as a driving source. Output rotation of the engine () is transmitted to driving wheels () through a torque converter () equipped with a lock-up clutch, a first gear train (), a transmission () formed by combination of a variator () and an auxiliary transmission (), a second gear train () and a final speed reduction device (). The second gear train () is provided with a parking mechanism () that mechanically locks an output shaft of the transmission () so that the output shaft of the transmission () cannot rotate during parking of the vehicle. A shift speed when down-shift is performed by the variator () during a torque-down request to the engine () is set to be slower than a shift speed when down-shift is performed by the variator () during a non-torque-down request.

Apparatus and method for controlling continuously variable transmission

As a mode switching shift line when a sub-transmission mechanism is switched from a first-speed to a second-speed, a first mode switching shift line, which prioritizes a learning of a hydraulic pressure with which a Low brake starts to slip and a learning of a hydraulic pressure with which a High clutch starts to transmit a torque, or a second mode switching shift line, which is a shift line in a Low side with respect to the first mode switching shift line and prioritizes a fuel efficiency of an engine is selected, and the sub-transmission mechanism is switched from the first-speed to the second-speed on the basis of the selected mode switching shift line.

Control device for continuously variable transmission and control method of the same

An automatic transmission control device implements a downshift by disengagement of a clutch that is engaged in a gear position before the downshift. It is determined whether an engine state is in a predetermined region in which a change of an engine torque per a change of an accelerator pedal opening is smaller than that in another region, and the engine torque is within a predetermined range, and an engine rotational speed is within a predetermined range. It is determined whether an operating state is in a predetermined state of accelerator operation in which the accelerator pedal opening is larger than a predetermined value, and an accelerator pedal opening change rate has an absolute value smaller than a predetermined value. The downshift is inhibited in response to determination that the engine state is in the predetermined region and the operating state is in the predetermined state of accelerator operation.

Automatic transmission control device

Growing community of inventors

Isehara, Japan

Sho Okutani