Toyota Jidosha Kabushiki Kaisha

Takahiro Kondo

Tomohiro Asami

Hiromichi Kimura

Hiroyuki Sawada

Koji Oshima

Kazuaki Nakamura

Shun Minaki

Yoshiki Ando

Seiji Kuwahara

Toshio Sugimura

Yoshiharu Harada

Toshimitsu Sato

Naoyuki Sakamoto

Masakazu Owatari

Masayasu Mizobuchi

Hisanori Nomoto

Akio Murasugi

Junichi Inoue

Makoto Nakayashiki

Shingo Akita

Ryuji Imai

Tatsuro Hatano

Masato Iijima

Koshiro Kosaka

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 controller for a hybrid vehicle is configured to execute a shifting assist process of increasing torque of a motor when performing power-on downshift of an automatic transmission and an upper limit assist torque setting process of setting an upper limit assist torque that is an upper limit value of a travel assist torque to be a smaller value when a maximum step number of the power-on downshift is large than when the maximum step number is small.

Controller and control method for hybrid vehicle

In a case where intermediate gear stage fault occurs, an electronic control unit determines, using a predetermined relationship for determining gear stage switching between a gear stage on a lower side than the intermediate gear stage by one stage and the intermediate gear stage, whether or not to execute gear stage switching between the low gear stage and a gear stage on a higher than the intermediate gear stage by one stage. For example, compared to using a relationship for determining gear stage switching between a gear stage on the higher side and the intermediate gear stage, it is possible to execute gear stage switching between a gear stage on the lower side and a gear stage on the higher side in a low vehicle speed region. Therefore, it is possible to suppress the influence on vehicle behavior.

Vehicle and control method for vehicle

In a control apparatus for a vehicle, when it is not determined that a downshift to a second gear stage should be carried out and an accelerator depression amount change rate is equal to or smaller than a predetermined value when it is determined that a downshift to a first gear stage should be carried out, a single downshift command to the first gear stage is output. When it is not determined that the downshift to the second gear stage should be carried out and the accelerator depression amount change rate is larger than the predetermined value when it is determined that the downshift to the first gear stage should be carried out, a current gear stage is maintained. Therefore, a skip downshift to the second gear stage can be carried out when it is determined that the downshift to the second gear stage should be carried out.

Control apparatus for vehicle

A control apparatus for an automatic transmission includes an ECU. The ECU stores a N&#x2212;1 speed downshift/a N&#x2212;2 speed downshift/a N&#x2212;1 speed upshift/and a hysteresis lines. The hysteresis line is a predetermined distance above the N&#x2212;1 speed upshift line, and is below the N&#x2212;2 speed downshift line. The ECU controls the speed of the automatic transmission based on a quantity of state of a vehicle, and the plurality of stored shift lines, and execute, when an N speed is established, a first downshift that changes a speed from the N speed to an N&#x2212;2 speed, when the quantity of state of the vehicle is in a region above the hysteresis line, after the quantity of state of the vehicle has risen above the N&#x2212;1 speed downshift line.

Control apparatus and control method for automatic transmission

An ECU executes a program including: a step of detecting a turbine revolution speed, a step of detecting an engine torque TE, a step of detecting a speed change ratio, a step of setting a range an enlarged slip region when a slip region enlargement condition is satisfied, and a step of enlarging the slip region toward a lock-up region side (high-load side).

Automatic gear control device

An ECU executes a program including detecting an engine speed; detecting a turbine speed; calculating a slip revolution speed of a torque converter as; calculating a hydraulic pressure control value based on the slip revolution speed and a map; and outputting a hydraulic pressure control signal to a linear solenoid. The map is set such that the hydraulic pressure control value is smaller as the slip revolution speed increases in positive values.

Control device for automatic transmission

An ECU executes a program including determining whether a mode is a neutral control execution mode, determining whether the mode is a neutral control return mode, detecting a proceeding state of the neutral control return mode when an accelerator is activated during the neutral control return mode, and inhibiting slip start when the mode is in an initial stage of the neutral control return mode.

An apparatus for controlling ignition timing during a shift in a vehicular automatic transmission is provided that is capable of suppressing shift shock in the event that input torque of the automatic transmission is affected by external changes, such as changes in fuel and air pressure and the like, by adjusting immediately to those changes. This control apparatus is provided with an ignition timing controller that controls an ignition timing retard amount; a calculator that calculates a basic retard amount; a detector that detects an engine retard amount; a determinator that determines a retard correction value based on a shift mode of the automatic transmission and the like; and a corrector that corrects the ignition timing retard amount of the controller based on the retard correction value, the basic retard amount, and the engine retard amount.

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Toyota, Japan

Takahiro Kondo