Toyota Jidosha Kabushiki Kaisha

Junichi Inoue

Tsuyoshi Fujikane

Yoshio Hasegawa

Hitoshi Matsunaga

Keigo Matsubara

Takahiro Kondo

Yoichi Nakashima

Kohei Dodo

Hayato Yoshikawa

Atsushi Muto

Tatsuya Kaneko

Masato Iijima

A cooling system for a vehicle that includes a temperature detection device for detecting a temperature related to a power transmission apparatus. The cooling system includes a cooling fan and an electronic control apparatus including a load limiting portion configured, when the detected exceeds a limit temperature value, to limit a load applied to the power transmission apparatus. The electronic control apparatus is configured to determine whether the detected temperature is equal to or higher than a fan-cooling temperature value that is lower than the limit temperature value, and to control rotation of the cooling fan, such that the cooling fan is rotated when the detected temperature is not lower than the fan-cooling temperature value, and such that a rotational speed of the cooling fan is higher when a temperature of the power transmission apparatus is high, than when the temperature of the power transmission apparatus is low.

Cooling system for vehicle

A vehicle controller controls a vehicle including an engine and an automatic transmission. The vehicle controller includes an electronic control unit. The electronic control unit estimates power generable by the engine based on a condition of the engine and a condition of the automatic transmission in a non-driving range, calculates a load on the automatic transmission in a driving range based on a condition of the automatic transmission in the driving range, determines whether a difference between the power and the load is equal to or smaller than a predetermined threshold by which an engine stall is identifiable, and limits a gear shift request from the non-driving range to the driving range when the difference is equal to or smaller than the predetermined threshold.

Vehicle controller and method of controlling vehicle

A control device of an automatic transmission to set and control a gear position based on a vehicle speed and an accelerator opening degree, includes a controller determining a high load travel based on a travel resistance during travel control on a gear shift line, which is set such that a region on a higher accelerator opening degree side of a downshift line is a region where a lock-up clutch is to be turned off, and turning off the lock-up clutch before downshifting when determining the high load travel.

Control device of automatic transmission

A map is provided that has an unlimited region where a take-off slip-engagement the next time is repeatedly executed indefinitely, a limited region where the take-off slip-engagement the next time is repeatedly executed only once, and a prohibited region where the take-off slip-engagement the next time is prohibited, and has a generated heat amount during the take-off slip-engagement and an elapsed time after the lock-up slip-engagement ends as variables. Therefore, a region in which the take-off slip-engagement the next time had been prohibited because the take-off slip-engagement the next time is unable to be repeatedly executed indefinitely even though it is able to be repeatedly executed only once is made the limited region, so the take-off slip-engagement the next time is allowed to be repeatedly executed only once.

Control apparatus for vehicular power transmitting apparatus

A control device of a vehicle drive-train system including an engine, an electronic throttle valve, an automatic transmission having a manual shift mode, a torque converter provided between the automatic transmission and the engine, and a lock-up clutch operable to directly connect an input member and an output member of the torque converter with each other includes a blipping control device that performs blipping control for temporarily increasing the output rotational speed of the engine by of the electronic throttle valve, when a power-off downshift is performed while the automatic transmission is in the manual shift mode; and a lock-up control device that engages or partially engages the lock-up clutch, based on a difference between a rotational speed of the output member of the torque converter and a rotational speed of the input member thereof, which the difference is reduced after the blipping control is started.

Growing community of inventors

Toyota, Japan

Junichi Inoue