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公开(公告)号：US11572069B2
公开(公告)日：2023-02-07
申请号：US17267744
申请日：2019-08-15
申请人： Caterpillar Inc.
摘要： The present disclosure relates to a method of controlling gear selection in a transmission of a vehicle in response to a directional shift requested by an operator and to a control system for controlling gear selection to manage directional shifts in vehicles, from a first direct to a second direction (e.g. forward to reverse). The method compares the current transmission output speed with a predetermined direction shift threshold transmission output speed. If the current transmission output speed is less than or equal to the predetermined direction shift threshold transmission output speed, the transmission is caused to execute a direction shift from the initial first direction gear to the same second direction gear, or a next highest second direction gear if there is no second direction gear which corresponds to the initial first direction gear. If the current transmission output speed is greater than the predetermined direction shift threshold transmission output speed, the direction shift is inhibited until the current transmission output speed slows to less than or equal to the predetermined direction shift threshold transmission output speed.
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公开(公告)号：US20220325789A1
公开(公告)日：2022-10-13
申请号：US17717940
申请日：2022-04-11
发明人： Hyeong-Tak Lee
摘要： In one aspect, a method of controlling gear shifting in response to a driving mode change, the method including determining a maximum number of allowable low-level gear-shifting steps according to a result of determining a state of a transmission, computing an immediate post-gear-shifting expected speed of a turbine for each step included that is within the maximum number of allowable low-level gear-shifting steps, using a current speed of an output shaft of the transmission and a gear ratio of each step and comparing the computed expected speed of the turbine with a preset allowable speed thereof for each step, setting the lowest-level gear-shifting step, among gear-shifting steps at which the expected speed of the turbine and the allowable speed thereof satisfy a predetermined condition, is set to be a target gear-shifting step, and executing gear-shifting control for shifting a current gear-shifting step down to the target gear-shifting step.
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公开(公告)号：US11226035B1
公开(公告)日：2022-01-18
申请号：US17115921
申请日：2020-12-09
摘要： A vehicle includes a powerplant, at least one drive wheel, a transmission, and a controller. The powerplant is configured to generate power to propel the vehicle. The transmission is configured to deliver power from the powerplant to the at least one drive wheel. The controller is programmed to, in response to a scheduled upshift of the transmission and detection of a set of conditions that are indicative of the vehicle climbing while on loose terrain, override upshifting the transmission and maintain a current gear of the transmission. The controller is further programmed to, in response to the scheduled upshift of the transmission and non-detection of at least one condition of the set of conditions that are indicative of the vehicle climbing while on loose terrain, upshift the transmission.
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公开(公告)号：US20220009459A1
公开(公告)日：2022-01-13
申请号：US17487235
申请日：2021-09-28
发明人： Di Wu , Yuan Yao , BO WANG , XIAO ZHANG , QING-QUAN WANG , RUI CHEN , CHAO TONG
摘要： Disclosed are an intelligent harvester with automatic braking function, and a braking method thereof. The intelligent harvester includes: a harvester body; a wireless communication assembly arranged in the harvester body and operatively connected to a remote control system; a communication detection system detecting a communication between the wireless communication assembly and the remote control system; and a braking system arranged in the harvester body and operatively connected to the communication detection system, wherein the braking system controls the harvester body to brake when the communication detection system detects the communication between the wireless communication assembly and the remote control system fails.
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公开(公告)号：US20210404552A1
公开(公告)日：2021-12-30
申请号：US17335841
申请日：2021-06-01
摘要： A transmission system configured to perform a gear change based on a shift operation by an operator is provided, which includes a power transmission system including a transmission and configured to transmit an engine driving force to wheels, a shift operation detecting module, and a transmission controlling module adapted to be executable of a manual rotation synchronizing mode having first and second steps. In the first step, when a first shift operation for changing the transmission to a lower-speed side is detected, the transmission controlling module sends a control signal to a connecting-and-disconnecting mechanism provided to the power transmission system to suspend the transmission of the driving force. In the second step, when a second shift operation is detected, the transmission controlling module sends a control signal to the connecting-and-disconnecting mechanism to resume the transmission of the driving force while the transmission is switched to the lower-speed side.
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公开(公告)号：US11203259B2
公开(公告)日：2021-12-21
申请号：US16806528
申请日：2020-03-02
发明人： Narihito Hongawara , Takuya Sugisawa , Keitaro Kageyama , Satoshi Fujikawa , Hiroki Tanabe , Shingo Kodama
IPC分类号： B60K6/365 , F16H61/16 , B60K6/547 , B60K6/383 , B60W10/02 , B60W10/06 , B60W10/115 , B60W30/192 , F16H61/04 , F16H3/66 , B60K6/26 , B60K6/48 , B60K6/387 , B60W30/20
摘要： A power train device of a vehicle includes an engine and an automatic transmission. The automatic transmission is configured such that in a neutral state, multiple ones of multiple rotary elements forming a power transmission path other than a rotary element coupled to an input member and a rotary element coupled to an output member are in a non-restraining state. The multiple ones of the multiple rotary elements include a rotary element of a predetermined brake among multiple friction fastening elements, and the predetermined brake is fastened before a fuel supply upon an engine start.
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公开(公告)号：US20210370942A1
公开(公告)日：2021-12-02
申请号：US17332351
申请日：2021-05-27
发明人： Brodie Lee Thompson , Sai Praveen Gundlapalli , Robert Anthony Herold , Alexander Eli Dowling , Scott Glenn Jackson
摘要： A method for shifting a transmission in a machine. The method includes detecting a request for a directional shift of the transmission and determining a ground speed of the machine in response to the request. The method further includes overriding the request if the ground speed is above a ground speed threshold. Further, the method includes preparing the machine for the directional shift by limiting an output speed of a power source of the machine and by issuing a command to a brake unit of the machine to reduce the ground speed of the machine. Furthermore, the method includes validating and raising the request to the transmission to execute the directional shift if the ground speed is below the ground speed threshold.
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公开(公告)号：US11149837B2
公开(公告)日：2021-10-19
申请号：US16355294
申请日：2019-03-15
摘要： A gear shroud arrangement includes a mounting plate defining an aperture therethrough. A first cylindrical shroud is included having a first end and an opposed second end, wherein the first end of the first shroud is connected to an outer periphery of the mounting plate and is aligned with the aperture. A backing plate is mounted to the second end of the first shroud. A second cylindrical shroud extends from the backing plate in a direction opposite the first shroud.
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公开(公告)号：US20210293329A1
公开(公告)日：2021-09-23
申请号：US17197566
申请日：2021-03-10
发明人： Kenichi Harada
摘要： A shift operation determination apparatus includes: an operation member rotatably attached to the vehicle; a position detection section configured to detect a position of the operation member in a rotation direction; a shift determination section configured to determine, based on the position of the operation member, a shift range selected by the operation member; and a regulation section configured to regulate a rotation of the operation member, the regulation section being configured to regulate the rotation of the operation member when the operation member moves to a second position corresponding to the second range from a first position corresponding to the first range or a third position corresponding to the third range and moves to the third position within a predetermined time after being located at the second position.
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公开(公告)号：US20210285539A1
公开(公告)日：2021-09-16
申请号：US16330553
申请日：2017-09-05
申请人： QinetiQ Limited
IPC分类号： F16H61/18 , F16H63/08 , F16H61/16 , F16H3/091 , F16H61/684
摘要： Some embodiments are directed toward a transmission having a torque input and output, drive members selectively engageable for sequentially changing gear ratio between the torque input and output, the transmission also having a shaft with a shifting feature. The transmission includes a drum having a track around its outer perimeter and arranged such that torque can be transferred by rotating the shaft, the drum capable of being moved along the length of the shaft, a biasing mechanism for urging the drum towards a rest position along the length of the shaft, and a drive member selector member provided in operative relation to the track, wherein by rotating the shaft the drive member selector member can be selectively urged into contact with a first drive member for drivingly engaging therewith in a first torque connection or into contact with a second drive member for drivingly engaging in a second torque connection.
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