公开(公告)号：US12085555B2

公开(公告)日：2024-09-10

申请号：US17369494

申请日：2021-07-07

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

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

IPC: G01N33/28 ,  F15B19/00 ,  F16H57/04 ,  G01N21/25

CPC classification number: G01N33/2888 ,  F15B19/00 ,  F16H57/0405 ,  G01N21/255 ,  G01N33/2841

Abstract: A deterioration estimation device includes a storage device and an execution device. The storage device is configured to store mapping data defining a mapping that outputs an output variable indicating the degree of deterioration of oil when an input variable is input. The mapping includes, as the input variable, a color variable that is a variable indicating a color of the oil and a hydrogen ion variable that is a variable indicating a hydrogen ion concentration of the oil. The execution device is configured to execute an acquisition process that is a process of acquiring the input variable and a calculation process of inputting the input variable acquired through the acquisition process to the mapping to output a value of the output variable.

公开(公告)号：US11421781B2

公开(公告)日：2022-08-23

申请号：US17359738

申请日：2021-06-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideaki Bunazawa ,  Atsushi Tabata ,  Koichi Okuda ,  Ken Imamura ,  Kota Fujii ,  Keita Sasaki

IPC: F16H61/30 ,  F16H59/42 ,  F16H59/14 ,  F16H61/08 ,  F16H59/18

Abstract: An oil pressure learning method of an automatic transmission includes acquiring a state of a vehicle in a state where relational regulation data is stored, supplying oil to the automatic transmission such that the value of the oil pressure is set to an oil pressure command value, calculating, as a specific variable, a variable representing an amount in which a detected input rotation speed exceeds a target input rotation speed, or the like, calculating a reward in a manner in which it has a larger value when the specific variable satisfies a criterion than when it does not satisfy the criterion, updating the relational regulation data by inputting, to an update mapping, the reward and the oil pressure command value, and calculating a torque variable having a value that is increased as an amount of change in an input torque is increased.

公开(公告)号：US11287034B2

公开(公告)日：2022-03-29

申请号：US17102641

申请日：2020-11-24

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ken Imamura

IPC: F16H61/14 ,  F16H59/72 ,  F16H59/46 ,  F16H61/02

Abstract: Provided is a lockup control device and a lockup control method for a vehicle power transmission device provided with a fluid transmission device including a lockup clutch. The lockup clutch is controlled to perform slip-engagement such that a differential rotation between an input-side rotating member and an output-side rotating member of the fluid transmission device is a target differential rotation set in advance, and the target differential rotation is corrected based on transition of a heat accumulation amount applied to friction members of the lockup clutch.

公开(公告)号：US11649892B2

公开(公告)日：2023-05-16

申请号：US17365676

申请日：2021-07-01

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kota Fujii ,  Atsushi Tabata ,  Koichi Okuda ,  Ken Imamura ,  Hideaki Bunazawa ,  Keita Sasaki

IPC: F16H61/04 ,  F16H59/18 ,  F16H59/70 ,  F16H59/42 ,  F16H61/02 ,  F16H59/72 ,  F16H59/68 ,  F16H61/00

CPC classification number: F16H61/04 ,  F16H59/18 ,  F16H59/42 ,  F16H59/70 ,  F16H59/72 ,  F16H61/0265 ,  F16H2059/683 ,  F16H2059/6807 ,  F16H2061/0096

Abstract: A hydraulic pressure calculation apparatus is applied to a gear shifting system including a transmission configured to switch between a connected state and a disconnected state of a friction engagement element depending on a hydraulic pressure supplied from a hydraulic circuit, and a hydraulic controller configured to control the hydraulic circuit. The hydraulic pressure calculation apparatus includes a memory and a processor. The memory stores pieces of mapping data of a plurality of phases obtained by dividing a period from a start to an end of switching between the connected state and the disconnected state of the friction engagement element. Each piece of the mapping data defines a mapping. The processor is configured to output, as an output variable, an estimated hydraulic pressure variable indicating an estimated value of an actual hydraulic pressure supplied from the hydraulic circuit to the friction engagement element.

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：US12014585B2

公开(公告)日：2024-06-18

申请号：US17490811

申请日：2021-09-30

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Atsushi Tabata ,  Ken Imamura ,  Koichi Okuda ,  Masato Nakano ,  Toshiaki Tamachi

IPC: G07C5/08 ,  G01M13/028

CPC classification number: G07C5/0808 ,  G01M13/028 ,  G07C5/085

Abstract: An unusual-noise determination device for a vehicle that performs unusual-noise determination to determine whether a power transmission system of the vehicle is generating unusual noise. The unusual-noise determination device includes an execution device and a memory device. The memory device stores a neural network that uses the maximum sound pressure and the excess ratio as inputs, and outputs a determination result variable, which is a variable indicating a result of the unusual-noise determination. The neural network is a trained neural network that has been trained using various values related to each of multiple vehicles as training data. The execution device is configured to perform the unusual-noise determination based on an output of the trained neural network that uses, as inputs, the maximum sound pressure and the excess ratio.

公开(公告)号：US11959545B2

公开(公告)日：2024-04-16

申请号：US17329644

申请日：2021-05-25

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hideaki Bunazawa ,  Atsushi Tabata ,  Koichi Okuda ,  Ken Imamura ,  Kota Fujii ,  Keita Sasaki

IPC: F16H59/42 ,  F16H61/02 ,  G06N20/00 ,  F16H59/18 ,  F16H61/00 ,  F16H61/04

CPC classification number: F16H59/42 ,  F16H61/0213 ,  G06N20/00 ,  F16H59/18 ,  F16H2061/0087 ,  F16H2061/009 ,  F16H2061/0096 ,  F16H2061/0459

Abstract: A vehicle control device includes a processor and memory. The memory stores relation-defining data for defining a relation between a state of a vehicle and an action variable that is a variable relating to operations of a transmission installed in the vehicle. The processor is configured to execute acquisition processing, operation processing, reward calculation processing, updating processing, counting processing, and limiting processing. The processor is configured to output the relation-defining data updated so that an expected income is increased when the transmission is operated following the relation-defining data, based on an updating map.

公开(公告)号：US11566966B2

公开(公告)日：2023-01-31

申请号：US17157399

申请日：2021-01-25

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

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

IPC: G01M13/02 ,  G07C5/08 ,  G10L25/51

Abstract: There is provided a method of specifying a location of occurrence of an abnormal sound, the method including: storing mapping data in a storage device, the mapping data prescribing mapping that receives, as inputs, a sound variable that matches a sound detected in a vehicle and a state variable of a drive-system device of the vehicle synchronized with the sound, and that outputs a location as a main cause of the sound; executing a sound signal acquisition process of acquiring a sound signal output from a microphone that detects a sound; a state variable acquisition process of acquiring the state variable of the drive-system device; and a specifying process of specifying the location of occurrence of the sound corresponding to the sound signal using the sound variable and the state variable as inputs to the mapping. There are also provided a non-transitory storage medium and an in-vehicle device.

公开(公告)号：US11519495B2

公开(公告)日：2022-12-06

申请号：US17340153

申请日：2021-06-07

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Kota Fujii ,  Atsushi Tabata ,  Koichi Okuda ,  Ken Imamura ,  Hideaki Bunazawa ,  Keita Sasaki

IPC: F16H59/72

Abstract: A heat load estimation device for a friction engaging element that estimates a heat load when at least one of a temperature, a heat generation amount, and presence or absence of seizure in the friction engaging element at a time of shifting of the transmission is regarded as the heat load, includes a storage device and an execution device. The storage device stores mapping data defining mapping. The mapping includes, as an input variable, a speed variable that is a variable indicating a relative rotation speed of members of the friction engaging element and a hydraulic pressure variable that is a variable indicating hydraulic pressure during the shifting of the transmission, and includes, as an output variable, the heat load. The execution device executes a calculation process for calculating a value of the output variable and a change process for changing an execution mode of the calculation process.

公开(公告)号：US11420646B2

公开(公告)日：2022-08-23

申请号：US17029593

申请日：2020-09-23

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Jun Yoshida ,  Ken Imamura

IPC: B60W50/08 ,  B60R25/20 ,  B60W50/06

Abstract: A driving apparatus is controlled by using a driving command that is obtained by applying an accelerator operation amount to a relation between the accelerator operation amount and the driving command for the driving apparatus, and the relation is set by using a distribution of usage of the driving command by a driver such that a gradient that is a change in the driving command with a change in the accelerator operation amount in a high usage range including a value having a longest usage time among values of the driving command is less than the gradient in a range other than the high usage range.