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公开(公告)号：US11649892B2
公开(公告)日：2023-05-16
申请号：US17365676
申请日：2021-07-01
发明人： Kota Fujii , Atsushi Tabata , Koichi Okuda , Ken Imamura , Hideaki Bunazawa , Keita Sasaki
IPC分类号： F16H61/04 , F16H59/18 , F16H59/70 , F16H59/42 , F16H61/02 , F16H59/72 , F16H59/68 , F16H61/00
CPC分类号： F16H61/04 , F16H59/18 , F16H59/42 , F16H59/70 , F16H59/72 , F16H61/0265 , F16H2059/683 , F16H2059/6807 , F16H2061/0096
摘要： 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.
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公开(公告)号：US11415217B2
公开(公告)日：2022-08-16
申请号：US17369500
申请日：2021-07-07
发明人： Kota Fujii , Atsushi Tabata , Koichi Okuda , Ken Imamura
摘要： 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.
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3.发明授权公开(公告)号：US11959545B2
公开(公告)日：2024-04-16
申请号：US17329644
申请日：2021-05-25
发明人： Hideaki Bunazawa , Atsushi Tabata , Koichi Okuda , Ken Imamura , Kota Fujii , Keita Sasaki
CPC分类号： F16H59/42 , F16H61/0213 , G06N20/00 , F16H59/18 , F16H2061/0087 , F16H2061/009 , F16H2061/0096 , F16H2061/0459
摘要： 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.
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公开(公告)号：US11566966B2
公开(公告)日：2023-01-31
申请号：US17157399
申请日：2021-01-25
发明人： Atsushi Tabata , Koichi Okuda , Kota Fujii , Ken Imamura
摘要： 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.
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5.发明授权公开(公告)号：US11519495B2
公开(公告)日：2022-12-06
申请号：US17340153
申请日：2021-06-07
发明人： Kota Fujii , Atsushi Tabata , Koichi Okuda , Ken Imamura , Hideaki Bunazawa , Keita Sasaki
IPC分类号： F16H59/72
摘要： 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.
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公开(公告)号：US11209081B2
公开(公告)日：2021-12-28
申请号：US16706967
申请日：2019-12-09
发明人： Shuma Naito , Atsushi Tabata , Kota Fujii
IPC分类号： F16H61/02 , B60K6/36 , B60K6/44 , F16H61/40 , F16H63/40 , F16H59/14 , F16H61/00 , B60K6/445 , B60K6/365
摘要： A control apparatus for a linear solenoid valve configured to regulate a hydraulic pressure in a vehicle transmission. The control apparatus includes a hydraulic control portion configured to output a control command signal that is applied to a solenoid of the linear solenoid valve. The hydraulic control portion outputs, as the control command signal, a regulating control command signal by which the hydraulic pressure is to be regulated to a regulated pressure value that is dependent on a vehicle driving state. When the regulated pressure value is in a certain pressure range in which vibration-based noise is likely to be generated by vibration of the linear solenoid valve that is operated with the regulating control command signal being applied to the solenoid, the hydraulic control portion outputs, as the control command signal, a noise-restraining command signal by which generation of the vibration-based noise is restrained.
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公开(公告)号：US10906524B2
公开(公告)日：2021-02-02
申请号：US16131889
申请日：2018-09-14
发明人： Masafumi Yamamoto , Atsushi Tabata , Tatsuya Imamura , Koichi Okuda , Kota Fujii
摘要： A control apparatus for a vehicular power transmitting system includes a power transmission switching portion configured to selectively establish a first drive mode by placing one of the first and second coupling elements in an engaged state, a second drive mode by placing the other of the first and second coupling elements in an engaged state, or a third drive mode by placing both of the first and second coupling elements in the engaged states. The power transmission switching portion switches the vehicular power transmitting system between the first and second drive modes through the third drive mode, where a predetermined condition is not satisfied, and switches the vehicular power transmitting system between the first and second drive modes with concurrent engaging and releasing actions of the first and second coupling elements, where the predetermined condition is satisfied.
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公开(公告)号：US10436304B2
公开(公告)日：2019-10-08
申请号：US15368036
申请日：2016-12-02
发明人： Kota Fujii , Yuji Yasuda , Atsushi Tabata , Haruhisa Suzuki , Koichi Okuda , Hiroyuki Tateno
摘要： A tolerance ring is arranged between an output-side rotary shaft and a rotor shaft. For this reason, even when looseness in a spline fitting portion of the output-side rotary shaft and rotor shaft is not filled, both the output-side rotary shaft and the rotor shaft are held by the tolerance ring so as not to rattle. Therefore, it is possible to reduce tooth hammer noise that occurs in the spline fitting portion. An output-side rotary shaft has oil passages for supplying lubricating oil to a tolerance ring. Lubricating oil is forcibly supplied through these oil passages to an annular space in which a tolerance ring is accommodated.
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公开(公告)号：US10190669B2
公开(公告)日：2019-01-29
申请号：US15421957
申请日：2017-02-01
发明人： Kota Fujii , Atsushi Tabata , Haruhisa Suzuki , Koichi Okuda , Hiroyuki Tateno
摘要： A tolerance ring is interposed between an output side rotary shaft and a rotor shaft. For this reason, even in a case where a backlash formed in a spline fitting portion between the output side rotary shaft and the rotor shaft is not eliminated, the rotary shafts of both of the output side rotary shaft and the rotor shaft are held by the tolerance ring without a backlash, and rattling noise can be suppressed. An oil supply groove for supplying a lubricant between an annular portion of the tolerance ring and the output side rotary shaft is provided inside an annular groove formed in the output side rotary shaft. With this, it is possible to suppress degradation of the durability of the tolerance ring without performing special processing on the tolerance ring.
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公开(公告)号：US12085555B2
公开(公告)日：2024-09-10
申请号：US17369494
申请日：2021-07-07
发明人： Atsushi Tabata , Ken Imamura , Kota Fujii , Koichi Okuda
CPC分类号： G01N33/2888 , F15B19/00 , F16H57/0405 , G01N21/255 , G01N33/2841
摘要： 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.
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