Toyota Jidosha Kabushiki Kaisha

Takuro Shimazu

Hiroki Kondo

Atsushi Ayabe

Akira Hino

Kunio Hattori

Daisuke Inoue

Kenji Matsuo

Taichi Washio

Motonori Kimura

Koichiro Muta

Michio Yoshida

Mitsuhiro Fukao

Yukio Kobayashi

Hirofumi Nakada

Hiromitsu Nitani

Akihide Ito

Shuhei Ishikawa

Yusuke Saigo

Mitsuhiro Toyoda

The hybrid vehicle includes an engine, a motor connected to the engine, and an electronic control unit configured to control the motor to execute motoring to rotate a crankshaft of the engine. The electronic control unit is configured to execute speed-drop offset control when a rotation speed of the engine falls below a first rotation speed that is lower than a self-sustaining rotation speed of the engine while the engine is operated in a self-sustaining manner at the self-sustaining rotation speed.

Hybrid vehicle and control method for same

A control apparatus for a vehicle drive-force transmitting apparatus including a gear mechanism and a continuously-variable transmission mechanism and defining first and second drive-force transmitting paths. When the continuously-variable transmission mechanism is in a failure state in which an actual gear ratio of the continuously-variable transmission mechanism is not the highest gear ratio as a target gear ratio, the control apparatus sets the target gear ratio to a transient target gear ratio that is gradually changed toward the highest gear ratio, for causing the actual gear ratio to be gradually changed toward the highest gear ratio. A rate of change of the transient target gear ratio is higher in a state in which a drive force is transmitted through the first drive-force transmitting path by the gear mechanism, than in a state in which the drive force is transmitted through the second drive-force transmitting path by the continuously-variable transmission mechanism.

Control apparatus for vehicle drive-force transmitting apparatus

A control apparatus for a drive-force transmitting apparatus that includes a transmission having primary and secondary pulleys. When a detection accuracy of rotational speed of the primary and secondary pulley is not assured, the control apparatus sets each of (i) a secondary-thrust calculation thrust ratio value used for calculation of a secondary thrust that is to be applied to the secondary pulley and (ii) a primary-thrust calculation thrust ratio value used for calculation of a primary thrust that is to be applied to the primary pulley, such that each of the secondary-thrust calculation thrust ratio value and the primary-thrust calculation thrust ratio value is dependent on a result of a determination as to whether an actual gear ratio of the transmission is the highest gear ratio and a result of a determination as to whether an input torque inputted to the transmission is lower than a given torque value.

A control apparatus for a vehicle drive-force transmitting apparatus including a continuously-variable transmission mechanism whose gear ratio is calculated based on a detected value of an input rotational speed of the transmission mechanism and a processed output-rotational-speed value that is a detected value of an output rotational speed of the transmission mechanism subjected to a filter processing. Updating the gear ratio of the transmission mechanism is inhibited (i) when the processed output-rotational-speed value is in a low rotational speed range with an absolute value of a rate of change of the processed output-rotational-speed value being not smaller than a given value, and also (ii) when the processed output-rotational-speed value is in the low rotational speed range with the absolute value of the rate of change of the processed output-rotational-speed value being smaller than the given value, if a certain operation that increases the absolute value is being executed.

When neutral control is started by placing a CVT drive clutch in a semi-engaged state while a vehicle is decelerating in a state where a second power transmission path is established, a clutch mechanism that is semi-engaged in neutral control while the vehicle is decelerating is changed from the CVT drive clutch to a forward clutch before a stop of the vehicle, so it is possible to continue the neutral control until a stop of the vehicle. At a stop of the vehicle, a power transmission path is already changed to a first power transmission path that establishes a gear ratio (EL) higher than a highest gear ratio (&#x3b3;max) that can be established by the second power transmission path. Thus, right after a stop of the vehicle, it is possible to execute idle stop control.

Control apparatus for vehicle

A control device for a vehicle includes a transmission mechanism capable of setting a fixed transmission gear ratio, a continuously variable transmission provided in parallel with the transmission mechanism, and a path switching mechanism for selectively blocking a torque transmission path that includes the transmission mechanism and that is configured to dampen vibration. The control device further includes a clutch mechanism where the continuously variable transmission and the transmission mechanism capable of setting constant transmission gear ratio are arranged in parallel between an input shaft and the output shaft, that selectively connects torque transmission path stretching from an internal combustion engine to drive wheels via transmission mechanism, and one clutch and other clutch are arranged in series, the other clutch is arranged on a relatively downstream side. A control unit is configured to engage one clutch in a case where torque is transmitted from the internal combustion engine to the drive wheels via the continuously variable transmission.

Control device for vehicle

A controller for a vehicle transmission is disclosed. The controller may include an electronic control unit configured to carry out a change shift for changing a path of the transmission of power between a first transmission path and a second transmission path by engaging a predetermined clutch mechanism. The electronic control unit may also be configured to set a change speed ratio region that defines a range of a speed ratio of the first transmission mechanism such that a rotation speed difference between engagement members of the clutch mechanism, which are engaged with each other in carrying out the change shift, is smaller than or equal to a predetermined value. When a speed ratio outside the change speed ratio region is set in the first transmission mechanism, the change shift is not carried out.

Growing community of inventors

Miyoshi, Japan

Takuro Shimazu