Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Aisin Corporation

Masakazu Kaifuku

Tooru Matsubara

Atsushi Tabata

Kenta Kumazaki

Hiroyuki Shibata

Hidenori Kato

Yuji Iwase

Yoshiki Ando

Hidenori Katoh

Tatsuya Imamura

Koichiro Muta

Masayuki Baba

Keita Imai

Keigo Matsubara

Toshinari Suzuki

Masaki Yoshida

Tomokazu Nomura

Tomoya Inayoshi

Kazuhiko Motodohi

Taku Akita

Masaru Katsuya

Yuto Yuasa

Jyunichi Matoba

Shiko Yoshimura

A vehicle control apparatus includes (a) a clutch control portion configured to output a hydraulic-pressure command value for supplying a hydraulic pressure to a clutch actuator of a clutch disposed between an engine and an electric motor, when the engine is to be started by being cranked by the electric motor, and (b) a learning control portion configured to execute a plurality of leanings for correcting a relationship representing a correlation between the hydraulic pressure and the hydraulic-pressure command value, wherein at least one of the leanings is a higher priority learning, and at least one of the leanings is a lower priority learning. The learning control portion is configured, when the higher priority learning is in an unconverged state, to cause a degree of reflection of a learning result of the lower priority learning to be lower, than when the higher priority learning is in a converged state.

Control apparatus for vehicle

A control device that includes an electronic control unit that is configured to perform neutral travel control that controls the transmission apparatus to enter a neutral state in which power is not transferred during rotation of the wheel, wherein the electronic control unit performs switching between an engaged neutral state in which a particular engagement device of the plurality of engagement devices is put in an engagement state and the transmission apparatus is put in a state in which power is not transferred and a released neutral state in which all of the plurality of engagement devices are put in a released state and the transmission apparatus is put in the state in which power is not transferred, based on at least a vehicle speed during the neutral travel control.

Control device for vehicle driving device

A vehicle control device for controlling a vehicle driving device including an internal combustion engine as a driving force source for a wheel and a transmission apparatus, wherein the transmission apparatus includes a transmission shift input member drivably coupled to the internal combustion engine, a transmission shift output member drivably coupled to the wheel, and a transmission mechanism having a plurality of engagement devices and selectively forming a plurality of transmission shift stages having different transmission shift ratios depending on engagement states of the plurality of engagement devices.

Vehicle control device

In a downshift of an automatic transmission in a state where an accelerator pedal is depressed, one of a clutch-to-clutch shift in which the shift is carried out by gradually reducing an engagement pressure of a clutch or a brake to be disengaged in the shift and a rotation synchronization shift in which the shift is carried out by reducing the engagement pressure of the clutch or the brake more quickly than in the clutch-to-clutch shift is selected based on an output shaft torque of the automatic transmission, a region where the rotation synchronization shift is selected is lower in output shaft torque than a region where the clutch-to-clutch shift is selected, and hence it is possible to appropriately selectively execute a shift placing emphasis on a shock and a shift placing emphasis on a shift speed in accordance with the output shaft torque.

Control apparatus and control method for vehicular automatic transmission

A vehicular shift control device is provided that controls the input rotational speed of a geared transmission by adjusting the rotational speed of a drive source at downshift of the geared transmission. The greater the deceleration of the vehicle, the smaller is set the change gradient of the input rotational speed of the geared transmission. Therefore, even if the decrease rate of the post-shifting synchronization rotational speed is great, the incident angle &#x3b3; of the input rotational speed of the geared transmission relative to the post-shifting synchronization rotational speed is maintained as a large angle. Even when the deceleration of the vehicle during downshift is great, the downshift is smoothly executed without producing an excessive synchronization shock.

Vehicular shift control device

A control device limiting an input torque to an automatic shifting portion before initiation of an inertia phase in a downshift as compared to a case of not executing the downshift, wherein in an input torque limiting control, if an accelerator variation before a start of the downshift is equal to or less than a predetermined accelerator variation limit, the control device limits the input torque before the initiation of the inertia phase to the input torque at a time of a shifting output commanding the execution of the downshift, and wherein if an accelerator variation before the start of the downshift is greater than the accelerator variation limit, the control device limits the input torque before the initiation of the inertia phase equal to or less than a predetermined input torque limit value larger than the input torque at the time of the shifting output.

Control device for vehicle drive device

A hybrid drive system including a rotating electric machine; an input member drive-coupled to an internal combustion engine and the rotating electric machine; an output member drive-coupled to a wheel; a speed change device with a plurality of switchable shift speeds changes the rotational speed of the input member and transmits the changed rotational speed to the output member; and a control device that controls the rotating electric machine. The control device corrects the output torque of the rotating electric machine so as to cancel out a torque fluctuation of the input member that accompanies an initial explosion of the internal combustion engine; and, when the initial explosion of the internal combustion engine occurs during a shift operation of the speed change device, modifies the torque correction amount in a direction that suppresses a change in the rotational speed of the input member that advances the shift operation.

Hybrid drive system

A control device for a vehicular drive system having (i) an engine, (ii) an electrically controlled differential portion operative to control an operating state of an electric motor connected to a rotary element of a differential mechanism for power-transmissive state for thereby controlling a differential state between a rotation speed of an input shaft connected to the engine, and a rotation speed of an output shaft, and (iii) a shifting portion forming a part of a power-transmitting mechanism between the electrically controlled differential portion and drive wheels, the control device including high-speed rotation preventing means for preventing high-speed rotations of each rotary elements of both the differential mechanism and the shifting portion, when a drop occurs or drop occurrence is predicted, in a supplied hydraulic pressure applied to a hydraulically operated frictional engaging device of the shifting portion, to a level less than a given value, wherein the high-speed rotation preventing means reduces torque or rotation speed of an input shaft of the shifting portion by controlling the engine or the electric motor.

Control device for vehicular drive system

A control apparatus and a control method for a vehicular drive apparatus that includes a driving power source, and a power transmission device that transmits power from the driving power source to a drive wheel are provided. It is determined that a malfunction occurs in the power transmission device, when a comparison value remains equal to or above a predetermined value for a predetermined period. The comparison value is obtained by making a comparison between an actual value and a theoretical value that relate to a rotational speed of a predetermined rotational member that constitutes at least a part of the vehicular drive apparatus. The predetermined period is set according to an operating state of the power transmission device. Thus, it is possible to reduce the possibility that it is erroneously determined that a malfunction occurs, and to quickly determine that a malfunction occurs.

Control apparatus and control method for vehicular drive apparatus

It is provided a power transmitting apparatus for a vehicle that is disposed in a power transmission path between an engine and driving wheels and that has an electric differential portion whose differential state between an input rotation speed and an output rotation speed is controlled by controlling a driving state through an electric motor coupled to a rotating element of the differential portion, wherein for varying the output rotation speed of the electric differential portion, at a predetermined time point, an amount of divergence between an actual rotation speed and a target rotation speed of the engine is calculated and the target rotation speed of the engine is set such that the amount of divergence converges at a predetermined slope and the convergence of the amount of divergence is delayed compared to that without any control.

Power transmitting apparatus for vehicle

A controller for a power transmission system that uses an engine and a motor as driving force sources to transmit power and that includes a transmission unit is provided. The transmission unit has a plurality of engagement devices and establishes a plurality of gears having different speed ratios by the frictional engagement devices. The transmission unit is arranged downstream of the driving force sources. The controller includes a torque transmission capacity setting unit that, when the transmission unit shifts gears, varies torque transmission capacities of the frictional engagement devices on the basis of an operating state of the motor and an operating state of the engine.

Controller for power transmission system

In a vehicular power transmitting apparatus provided with an electrically-controlled differential portion in which controlling an operating state of an electric motor controls a differential state of a differential mechanism, a control device for starting up a drive force source in an appropriate mode depending on a vehicle condition can be provided. The control device includes drive-force source start control means for switching start modes of an engine depending on a vehicle condition to achieve an appropriate start mode for the engine depending on the vehicle condition, so that for instance a contracted drive range by a second electric motor can be avoided.

Control device for vehicular power transmitting apparatus

A vehicle power transmission system has a first electric motor, a differential section, a power interruption element forming part of a power transmission path, a second electric motor connected to a power transmission path, and a control device that maintains the output rotational speed of the differential section at a predetermined constant value or at a value within a predetermined range until the engagement of the power interruption element is completed, so as to control a rotational speed of a primary power source by the first electric motor during the period when the state of the vehicle power transmission system is being switched front a non-drive mode to a drive mode.

Vehicle power transmission system

A drive system of a hybrid vehicle, including an engine, a first electric motor, a second electric motor operatively connected to a drive wheel of the hybrid vehicle, and two planetary gear mechanisms, and wherein the two planetary gear mechanisms have at least four rotary elements arranged to permit the drive system to be placed in a selected one of a first operation mode in which the rotary element connected to the engine and the rotary element connected to the first electric motor are disposed on opposite sides of the rotary element connected to the drive wheel and the second electric motor, as seen in a collinear chart in which the four rotary elements are located at respective four different positions along a base line, and a second operation mode in which the rotary element connected to the first electric motor and the rotary element connected to the drive wheel and the second electric motor are disposed on opposite sides of the rotary element connected to the engine, as seen in said collinear chart.

Hybrid vehicle drive system

A control apparatus for a vehicular power transmitting system including (a) an electrically controlled differential portion which has a differential mechanism and a first electric motor connected to a rotary element of the differential mechanism and which is operable to control a differential state between a rotating speed of its input shaft connected to a drive power source and a rotating speed of its output shaft by controlling an operating state of the first electric motor, and (b) a switching portion operable to switch a power transmitting path for transmitting power from the drive power source, between a power transmitting state and a power cut-off state, the control apparatus including a control range setting portion configured to set one of two different control ranges of a rotating speed of the output shaft, depending upon whether the power transmitting path is placed in the power transmitting state or said power cut-off state, by the switching portion.

Growing community of inventors

Okazaki, Japan

Masakazu Kaifuku