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公开(公告)号：US20200166125A1
公开(公告)日：2020-05-28
申请号：US16695257
申请日：2019-11-26
摘要： A gear change control device according to an embodiment includes a detection unit configured to detect the gear stage of a transmission and measure the input rotation rate of the transmission and the rotation rate of an engine and a controller configured to decrease the torque of a clutch to a second reference value from a first reference value when a first time elapses from a time point at which the rotation rate of the engine and the input rotation rate of the transmission become different from each other due to a gear change from a certain gear stage to a gear stage one or a plurality of stages higher than the certain gear stage that is performed by the transmission.
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公开(公告)号：US20200284302A1
公开(公告)日：2020-09-10
申请号：US16792976
申请日：2020-02-18
发明人： Yukihiro Inaba , Akihiko Ichikawa , Tomoyasu Kurimoto , Takeshi Kamiya , Yuuki Masui , Isamu Shiotsu , Yasumitsu Osada
摘要： A dog clutch for a vehicle includes gear-side meshing teeth provided on a shifting gear fitted so as to be rotatable relative to a shaft, and a dog ring disposed adjacent to the shifting gear in the axial direction of the shaft. The dog ring includes a first ring, a second ring, and springs interposed between the two rings. The first ring is provided with meshing teeth that can be meshed with the gear-side meshing teeth of the shifting gear. The second ring is provided with meshing teeth that can be meshed with the gear-side meshing teeth of the shifting gear. The springs are provided on the inner peripheral side of a circle that is centered on a rotational axis and that circumscribes a portion of the meshing teeth of the first ring and the second ring positioned on the outermost peripheral side.
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公开(公告)号：US10711895B2
公开(公告)日：2020-07-14
申请号：US16358103
申请日：2019-03-19
发明人： Tomoyasu Kurimoto , Akihiko Ichikawa , Shinichi Takeuchi , Jun Yabuta , Yuki Masui , Takeshi Yano
IPC分类号： F16H61/12 , F16H63/50 , F16H61/02 , F16H63/18 , B60W10/11 , F16D11/10 , F16D11/14 , F16H3/091 , F16H63/30 , F16H55/17
摘要： A control apparatus for a vehicle transmission that includes: transmission gears disposed on a shaft; a switching mechanism which is to be switched between a connecting state in which one of the transmission gears is rotatable integrally with the shaft and a disconnecting state in which the one of the transmission gears is rotatable relative to the shaft; a shift fork for axially moving the switching mechanism; and a shift barrel to be rotated to position the shift fork. The switching mechanism includes first and second rings and an elastic member which is disposed between the first and second rings in the axial direction and connects the first and second rings. The control apparatus determines that a failure occurs in the vehicle transmission, when a value related to a reaction force that acts on the shift barrel during rotation of the shift barrel is deviated from a predetermined range.
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公开(公告)号：US10920877B2
公开(公告)日：2021-02-16
申请号：US15795598
申请日：2017-10-27
发明人： Shinichi Takeuchi , Akihiko Ichikawa , Tomohiro Yoshimura , Tomomitsu Terakawa , Jun Yabuta , Klemens Pollmeier , Lars van Leeuwen , Andree Miller , Patrizio Agostinelli
摘要： A control apparatus for a vehicular transmission including at least one dog clutch each having a first dog member mounted on a first shaft such that the first dog member is rotated together with the first shaft, and at least one second dog member each mounted to be axially adjacent to the first dog member and rotatable relative to the first shaft, first gears each mounted to be rotatable relative to the first shaft and provided with the second dog member, second gear which are mounted such that the second gears are rotated together with a second shaft parallel to the first shaft, and which mesh with the respective first gears, and a shifting mechanism for selectively placing each dog clutch in an engaged or released state. The control apparatus includes: a first calculating portion for detecting to a rotary angular position of the first shaft, and calculating a rotary angular position of the first dog member on the basis of the detected rotary angular position of the first shaft; a second calculating portion for detecting a rotary angular position of the second shaft, and calculating a rotary angular position of each second dog member on the basis of the detected rotary angular position of the second shaft; and an engagement control portion for controlling the shifting mechanism on the basis of the rotary angular positions of the first and second dog members, for engagement of the first and second dog members with each other.
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公开(公告)号：US10788125B2
公开(公告)日：2020-09-29
申请号：US15704843
申请日：2017-09-14
发明人： Shinichi Takeuchi , Akihiko Ichikawa , Junichi Muraoka , Kotaro Hoshihara , Tomohiro Yoshimura , Jun Yabuta , Klemens Pollmeier , Lars Van Leeuwen , Andree Miller
摘要： A first dog ring and a second dog ring are biased toward each other by means of springs. When the first dog ring and the second dog ring are moved away from each other, bias force produced by the springs is applied to the second dog ring in a direction to draw the second dog ring toward the first dog ring. Accordingly, when the first dog ring is moved away from the second dog ring during shifting, the second dog ring is drawn toward the first dog ring under the bias force, and third engaging teeth of the second dog ring and meshing teeth of a first-speed gear are promptly disengaged from each other.
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公开(公告)号：US10995851B2
公开(公告)日：2021-05-04
申请号：US16695257
申请日：2019-11-26
摘要： A gear change control device according to an embodiment includes a detection unit configured to detect the gear stage of a transmission and measure the input rotation rate of the transmission and the rotation rate of an engine and a controller configured to decrease the torque of a clutch to a second reference value from a first reference value when a first time elapses from a time point at which the rotation rate of the engine and the input rotation rate of the transmission become different from each other due to a gear change from a certain gear stage to a gear stage one or a plurality of stages higher than the certain gear stage that is performed by the transmission.
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公开(公告)号：US20190301605A1
公开(公告)日：2019-10-03
申请号：US16358103
申请日：2019-03-19
发明人： Tomoyasu Kurimoto , Akihiko Ichikawa , Shinichi Takeuchi , Jun Yabuta , Yuki Masui , Takeshi Yano
摘要： A control apparatus for a vehicle transmission that includes: transmission gears disposed on a shaft; a switching mechanism which is to be switched between a connecting state in which one of the transmission gears is rotatable integrally with the shaft and a disconnecting state in which the one of the transmission gears is rotatable relative to the shaft; a shift fork for axially moving the switching mechanism; and a shift barrel to be rotated to position the shift fork. The switching mechanism includes first and second rings and an elastic member which is disposed between the first and second rings in the axial direction and connects the first and second rings. The control apparatus determines that a failure occurs in the vehicle transmission, when a value related to a reaction force that acts on the shift barrel during rotation of the shift barrel is deviated from a predetermined range.
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公开(公告)号：US11168741B2
公开(公告)日：2021-11-09
申请号：US16792976
申请日：2020-02-18
发明人： Yukihiro Inaba , Akihiko Ichikawa , Tomoyasu Kurimoto , Takeshi Kamiya , Yuuki Masui , Isamu Shiotsu , Yasumitsu Osada
摘要： A dog clutch for a vehicle includes gear-side meshing teeth provided on a shifting gear fitted so as to be rotatable relative to a shaft, and a dog ring disposed adjacent to the shifting gear in the axial direction of the shaft. The dog ring includes a first ring, a second ring, and springs interposed between the two rings. The first ring is provided with meshing teeth that can be meshed with the gear-side meshing teeth of the shifting gear. The second ring is provided with meshing teeth that can be meshed with the gear-side meshing teeth of the shifting gear. The springs are provided on the inner peripheral side of a circle that is centered on a rotational axis and that circumscribes a portion of the meshing teeth of the first ring and the second ring positioned on the outermost peripheral side.
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公开(公告)号：US10859139B2
公开(公告)日：2020-12-08
申请号：US15705380
申请日：2017-09-15
发明人： Tomohiro Yoshimura , Shinichi Takeuchi , Akihiko Ichikawa , Jun Yabuta , Klemens Pollmeier , Lars Van Leeuwen , Andree Miller , Patrizio Agostinelli
IPC分类号： F16H3/097 , F16H3/00 , F16H61/688 , F16D11/14 , F16D21/04 , F16D23/02 , F16H63/30 , F16H3/093 , F16H3/08
摘要： A vehicle transmission has a plurality of gear positions that are to be selectively established, and includes: an input shaft; a first shaft; a second shaft; an output shaft; at least one first drive gear disposed on the first shaft; at least one second drive gear disposed on the second shaft; at least one driven gear disposed on the output shaft; a dog clutch connecting and disconnecting between the input shaft and each of the first and second shafts; and a synchronous meshing apparatus. The synchronous meshing apparatus connects and disconnects between each of the first and second shafts and the output shaft, and, when connecting between each of the first and second shafts and the output shaft, establishes a power transmission path from each of the first and second shafts to the output shaft via a selected one of the at least one first or second drive gear.
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公开(公告)号：US10738886B2
公开(公告)日：2020-08-11
申请号：US15704843
申请日：2017-09-14
发明人： Shinichi Takeuchi , Akihiko Ichikawa , Junichi Muraoka , Kotaro Hoshihara , Tomohiro Yoshimura , Jun Yabuta , Klemens Pollmeier , Lars Van Leeuwen , Andree Miller
摘要： A first dog ring and a second dog ring are biased toward each other by means of springs. When the first dog ring and the second dog ring are moved away from each other, bias force produced by the springs is applied to the second dog ring in a direction to draw the second dog ring toward the first dog ring. Accordingly, when the first dog ring is moved away from the second dog ring during shifting, the second dog ring is drawn toward the first dog ring under the bias force, and third engaging teeth of the second dog ring and meshing teeth of a first-speed gear are promptly disengaged from each other.
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