公开(公告)号：US11458952B2

公开(公告)日：2022-10-04

申请号：US17008519

申请日：2020-08-31

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Koichi Okuda ,  Atsushi Tabata ,  Yasutaka Tsuchida ,  Yuuki Makino

IPC: B60W20/15 ,  B60W10/06 ,  B60W10/08 ,  B60W10/10 ,  B60W40/068 ,  B60W30/18 ,  B60W10/12

Abstract: In a hybrid vehicle including an engine, a first motor, a differential unit, a second motor, a driving force split device, and a controller, the controller is configured to control the engine, the first motor, and the second motor such that the hybrid vehicle travels with the engine rotating within a range of an allowable maximum rotational speed for control or less. In this case, the controller is configured to set the allowable maximum rotational speed such that the allowable maximum rotational speed is higher when a main-side ratio is lower than when the main-side ratio is higher. The main-side ratio is a ratio of a driving force that is transmitted to main drive wheels to the total driving force that is transmitted from a drive shaft to the main drive wheels and sub drive wheels via the driving force split device.

公开(公告)号：US11433912B2

公开(公告)日：2022-09-06

申请号：US17023549

申请日：2020-09-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takeshi Kitahata ,  Atsushi Tabata ,  Kenji Miyasaka ,  Koichi Okuda

IPC: F16H61/12 ,  B60W50/02 ,  F16H59/18 ,  F16H59/44 ,  F16H59/72 ,  G07C5/08

Abstract: A vehicle failure-factor specifying apparatus includes (a) a peculiarity-presence determining portion configured to determine, based on a pre-failure driving state in a stage prior to occurrence of a certain failure in a vehicle, whether a peculiarity was present or absent in the pre-failure driving state, and (b) a failure-causing-driving state specifying portion configured, when the peculiarity was present in the pre-failure driving state, to determine whether the peculiarity present in the pre-failure driving state of the vehicle is substantially identical with a peculiarity in the pre-failure driving state of other vehicles. The peculiarity-presence determining portion determines whether the peculiarity was present or absent in the pre-failure driving state of the vehicle, depending on whether a frequency distribution of the pre-failure driving state of the vehicle is deviated from a frequency distribution of a non-failure driving state of a plurality of vehicles including the other vehicles in a non-failure case.

公开(公告)号：US11415217B2

公开(公告)日：2022-08-16

申请号：US17369500

申请日：2021-07-07

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kota Fujii ,  Atsushi Tabata ,  Koichi Okuda ,  Ken Imamura

IPC: F16H59/72 ,  F16H61/12 ,  F01P11/16 ,  F16H57/04 ,  F16H61/00

Abstract: A device for a vehicle including: a memory configured to store mapping data including machine learning data defining a mapping that uses an estimation variable that is a variable indicating a vehicle operation status of the vehicle and a detection value of a sensor detecting an oil temperature of a power transmission device as input variables, and uses an element corresponding to the input variables as an output variable; and a processor configured to: acquire the input variables; use the mapping to acquire the element as the output variable of the mapping corresponding to the input variables; and determine based on the element whether the detection value becomes equal to or higher than a threshold value due to occurrence of an abnormality in the power transmission device or a mode of vehicle operation by the driver of the vehicle.

公开(公告)号：US11383693B2

公开(公告)日：2022-07-12

申请号：US16372514

申请日：2019-04-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takeshi Kitahata ,  Tooru Matsubara ,  Kazuyuki Shiiba ,  Koichi Okuda ,  Atsushi Tabata

IPC: B60W20/00 ,  B60K6/387 ,  B60K6/547 ,  B60W10/02 ,  B60W10/06 ,  B60W10/08 ,  B60K6/40

Abstract: A hybrid vehicle with an engine and a rotary machine each coupled to a drive wheel in a power transmittable manner, comprises: an electronic control device that makes the rotary machine output a starting-time compensation torque to compensate a drop in a drive torque caused in a starting process of the engine in addition to a running torque when the engine is started while the vehicle is in a running state in which the drive torque is generated by the rotary machine and the engine is in a stopped state. The electronic control device starts the engine such that a starting-time inertia torque that is generated according to starting of the engine and causes the drop in the drive torque is made smaller when a torque margin of the rotary machine which is applied to the starting-time compensation torque is relatively small than when the torque margin is relatively large.

公开(公告)号：US11352943B2

公开(公告)日：2022-06-07

申请号：US16916673

申请日：2020-06-30

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi Tabata ,  Koichi Okuda ,  Tooru Matsubara ,  Takahiro Kimura ,  Yasutaka Tsuchida

IPC: F02D41/14 ,  F02B37/14 ,  F02B37/22 ,  B60W10/06 ,  B60W20/10

Abstract: A rotation adjusting device is controlled such that an engine speed rising rate at the time of acceleration request is made smaller when a turbocharging pressure is lower than the turbocharging pressure is higher. Therefore, an engine speed can be increased at such a low speed that a rising delay in the turbocharging pressure hardly occurs, in a low turbocharging pressure region. Further, when the rotation adjusting device is controlled such that the engine speed rising rate at the time of the acceleration request is set to a value corresponding to the turbocharging pressure, an MG2 torque is controlled to compensate for an insufficient drive torque of an actual engine torque for a request engine torque. Therefore, even when the engine torque is increased slowly by increasing the engine speed at a slow speed, the insufficient drive torque is compensated for by the MG2 torque.

公开(公告)号：US11338790B2

公开(公告)日：2022-05-24

申请号：US16924132

申请日：2020-07-08

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi Tabata ,  Koichi Okuda ,  Tooru Matsubara ,  Takashi Kohno ,  Yasutaka Tsuchida

IPC: B60W10/08 ,  B60W20/13 ,  B60W20/20

Abstract: Since a maximum rotation speed is set to a lower value when a supercharging pressure from a supercharger is high than when the supercharging pressure is low, an engine torque is decreased at a relatively low engine rotation speed and the engine rotation speed is less likely to fall into a high-rotation state. Since the maximum rotation speed is set to a relatively high value when the supercharging pressure is relatively low and the engine rotation speed is less likely to fall into a high-rotation state, the engine torque is not decreased at a relatively high engine rotation speed and power performance can be easily secured. Accordingly, it is possible to curb a decrease in power performance due to a decrease in the engine torque and to prevent the engine rotation speed from falling into a high-rotation state.

公开(公告)号：US11325584B2

公开(公告)日：2022-05-10

申请号：US16925929

申请日：2020-07-10

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi Tabata ,  Koichi Okuda ,  Tooru Matsubara ,  Yasuhiro Hiasa ,  Yasutaka Tsuchida

IPC: B60W20/15 ,  B60W10/06 ,  B60W10/08

Abstract: A control device for a hybrid vehicle includes: a drive control unit that calculates required drive power which is required for a hybrid vehicle based on an accelerator opening when an accelerator return operation is performed, calculates a target engine output which changes slowly with respect to a required engine output for realizing the required drive power through slow change processing, and controls an engine, a first rotary machine, and a second rotary machine such that an engine output reaches the target engine output; and a smoothing rate setting unit that changes a smoothing rate which is used for the slow change processing based on a supercharging pressure and sets the smoothing rate to a smaller value when the supercharging pressure is high than when the supercharging pressure is low.

公开(公告)号：US11142206B2

公开(公告)日：2021-10-12

申请号：US16984810

申请日：2020-08-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi Tabata ,  Koichi Okuda ,  Koji Hayashi ,  Masato Nakano ,  Toshiaki Tamachi ,  Daiki Sato

IPC: G06F1/00 ,  B60W30/188 ,  B60W10/06 ,  B60W10/10 ,  B60W50/00

Abstract: When a noise generation duration time predicted by a prediction unit is equal to or less than a predetermined time and it is predicted that generation of noise can be further curbed in comparison with a case in which the noise generation duration time in which noise is generated is relatively short and the noise generation duration time is greater than the predetermined time, an engine operating point control unit controls an engine and a differential unit such that an engine operating point reaches an engine operating point in an optimal fuel-efficiency operating line and thus it is possible to curb generation of noise and to curb a decrease in fuel efficiency.

公开(公告)号：US20210086751A1

公开(公告)日：2021-03-25

申请号：US16925280

申请日：2020-07-09

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi Tabata ,  Koichi Okuda ,  Tooru Matsubara ,  Yasuhiro Hiasa ,  Yasutaka Tsuchida

IPC: B60W20/30 ,  B60W20/15 ,  G01P3/08

Abstract: Since a maximum rotation speed of a second rotary machine is set to a lower value when a supercharging pressure is high than when the supercharging pressure is low, an engine torque decreases with an rotation speed of the second rotary machine which is relatively low and the rotation speed is less likely to fall into a high-rotation state. When the supercharging pressure is relatively low and the rotation speed is less likely to reach an upper-limit rotation speed of the second rotary machine, the maximum rotation speed is set to a relatively high value. Accordingly, the engine torque does not decrease to the rotation speed which is relatively high and power performance can be easily secured. As a result, it is possible to prevent a decrease in power performance due to the decrease in the engine torque and to prevent the rotation speed from falling into a high-rotation state.

公开(公告)号：US20210078563A1

公开(公告)日：2021-03-18

申请号：US16925422

申请日：2020-07-10

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi Tabata ,  Koichi Okuda ,  Tooru Matsubara ,  Yasutaka Tsuchida

IPC: B60W20/10 ,  B60W10/06 ,  B60W10/08

Abstract: When a travel mode in which an engine is not used as a drive power source for travel is switched to a travel mode in which the engine is used as a drive power source for travel in response to an acceleration request from a driver, it is determined whether an assist torque which is able to be output from a second rotary machine is sufficient for a required assist torque for compensating for an output shortage of the engine due to a supercharging response delay in a supercharger. When it is determined that the assist torque is not sufficient for the required assist torque, an engine rotation speed is increased to a predetermined target rotation speed by an MG1 torque of a first rotary machine.