公开(公告)号：US20250124745A1

公开(公告)日：2025-04-17

申请号：US18380804

申请日：2023-10-17

Applicant: KUBOTA CORPORATION

Inventor： Yuji FUKUDA ,  Ryota HAMAMOTO ,  Joshua James Skanderup ,  Landon Roland Rosenboom

IPC: G07C5/00 ,  E02F3/96 ,  E02F9/24 ,  E02F9/26 ,  G07C5/04 ,  H04Q9/00

Abstract: A telematics service system includes a transmitter provided in or on an attachment mountable to and demountable from a working vehicle to transmit a wireless signal, a first communicator to receive the wireless signal transmitted from the transmitter, a second communicator to transmit attachment information including identification information about the attachment, a server to receive the attachment information to manage telematics information, and a controller to acquire the identification information from the wireless signal received by the first communicator, include the identification information into the attachment information, and cause the second communicator to transmit the attachment information to the server. The controller causes the second communicator to transmit, to the server, information relating to the state of the attachment that has changed in response to an operation to mount the attachment to the working vehicle and/or an operation to demount the attachment from the working vehicle.

公开(公告)号：US20230193596A1

公开(公告)日：2023-06-22

申请号：US18074725

申请日：2022-12-05

Applicant: KUBOTA CORPORATION

Inventor： Kazuki UEDA ,  Yuji FUKUDA ,  Ryota HAMAMOTO

IPC: E02F9/22

CPC classification number: E02F9/2253 ,  E02F9/2296

Abstract: In a working machine, a controller decreases a supply amount of a hydraulic fluid from a travel pump to a travel motor based on a travel state of a machine body when a speed-change instruction of increasing or decreasing speed is output by operating a switch, and a pressure detector detects a travel pressure that is a pressure of a hydraulic fluid delivered by the travel pump to the travel motor. In accordance with the travel pressure detected by the travel pressure detector, the controller changes a delay period lasting up to a switching timing of the travel switching valve from an output timing of the speed-change instruction of the switch.

公开(公告)号：US20220307229A1

公开(公告)日：2022-09-29

申请号：US17839019

申请日：2022-06-13

Applicant: KUBOTA CORPORATION

Inventor： Yuji FUKUDA ,  Jun TOMITA ,  Ryota HAMAMOTO ,  Ryosuke KINUGAWA ,  Yoshimitsu TANAKA

IPC: E02F9/22 ,  E02F9/02 ,  E02F9/24 ,  F16H61/456 ,  B62D55/06

Abstract: A working machine is provided, which includes a prime mover, a first traveling pump driven by power of the prime mover to supply operation fluid through a connector fluid tube, a traveling motor including first and second ports connected to the connector fluid tube, the traveling motor configured to be switched in a first speed and a second speed higher than the first speed, a first pressure detector to detect first traveling-pump pressure near the first port, a second pressure detector to detect second traveling-pump pressure near the second port, and a controller configured, with the traveling motor switched in the second speed, to automatically shift down the traveling motor from the second speed to the first speed, when a differential pressure between the first traveling-pump pressure and the second traveling-pump is equal to or more than a deceleration threshold.

公开(公告)号：US20210404150A1

公开(公告)日：2021-12-30

申请号：US17360398

申请日：2021-06-28

Applicant: KUBOTA CORPORATION

Inventor： Yuji FUKUDA ,  Ryota HAMAMOTO ,  Jun TOMITA ,  Daiki ABE

IPC: E02F9/22

Abstract: A working machine includes a prime mover, a traveling pump driven by a power of the prime mover to deliver operation fluid, a traveling motor rotated by the operation fluid delivered from the traveling pump to have a rotation speed stage shiftable between a first speed stage and a second speed stage higher than the first speed stage, a traveling switching valve shiftable between a first state where the rotation speed stage of the traveling motor is set to the first speed stage and a second state where the rotation speed stage of the traveling motor is set to the second speed stage, an actuation valve configured to change a pilot pressure of a pilot fluid to control a flow of operation fluid delivered from the traveling pump, and a controller configured to control the pilot pressure of the pilot fluid output from the actuation valve so that a value of the pilot pressure differs depending on whether the set rotation speed stage of the traveling motor is the first speed stage or the second speed stage.

公开(公告)号：US20210123215A1

公开(公告)日：2021-04-29

申请号：US17076361

申请日：2020-10-21

Applicant: KUBOTA CORPORATION

Inventor： Yuji FUKUDA ,  Ryota HAMAMOTO ,  Jun TOMITA

IPC: E02F9/22 ,  E02F9/02 ,  F16H61/16 ,  F16H59/02 ,  F16H61/4035

Abstract: A working machine includes a machine body, a prime mover, a traveling device mounted on the machine body, a traveling motor to provide a power to the traveling device and to switch between a first speed and a second speed higher than the first speed, a traveling pump to be driven by the prime mover and to supply operation fluid to the traveling motor, and a controller device including an automatic shifter to automatically shift the traveling motor to the first speed or to the second speed, a timer to count an elapsed time from the automatically shifting, and a shift prohibitor to prohibit the automatically shifting by the automatic shifter when the elapsed time counted by the timer is less than a threshold.

公开(公告)号：US20210123212A1

公开(公告)日：2021-04-29

申请号：US17076282

申请日：2020-10-21

Applicant: KUBOTA CORPORATION

Inventor： Masahiro TOYAMA ,  Ryuki NISHIMOTO ,  Yuji FUKUDA ,  Kohei NAGAO ,  Ryota HAMAMOTO ,  Hiroaki NAKAGAWA

IPC: E02F9/22 ,  E02F9/20

Abstract: A working machine includes a hydraulic device, an operation valve to supply operation fluid to operate the hydraulic device and to vary the operation fluid to be supplied to the hydraulic device, an operation device having an operation member supported swingably, the operation device being configured to output an operation signal in accordance with an operation amount of the operation member, and a controller including a swing calculator to calculate an evaluation value representing a degree of swinging of the operation member, and a control signal generator to generate a control signal based on the evaluation value and the operation signal.

公开(公告)号：US20250154744A1

公开(公告)日：2025-05-15

申请号：US19026509

申请日：2025-01-17

Applicant: KUBOTA CORPORATION

Inventor： Kohei NAGAO ,  Daiki ABE ,  Ryota HAMAMOTO

IPC: E02F9/22

Abstract: A work vehicle includes a primary pressure control valve configured to control a pilot primary pressure of pilot oil. A secondary pressure control valve is configured to control a pilot secondary pressure of the pilot oil. Control circuitry is configured to control a rotation speed of an engine according to a target rotation speed. The control circuitry is configured to control the primary pressure control valve and the secondary pressure control valve based on a first target value of the pilot primary pressure and a second target value of the pilot secondary pressure.

公开(公告)号：US20240102263A1

公开(公告)日：2024-03-28

申请号：US17953535

申请日：2022-09-27

Applicant: KUBOTA CORPORATION

Inventor： Ryota HAMAMOTO ,  Hiroaki NAKAGAWA ,  Yuji FUKUDA

IPC: E02F9/20 ,  E02F9/24 ,  E02F9/26

CPC classification number: E02F9/2033 ,  E02F9/24 ,  E02F9/262 ,  E02F9/265 ,  E02F9/2285

Abstract: A working machine includes a machine body, a working device provided on the machine body movably up and down with respect to the machine body, a protector provided on the machine body to protect an operator's seat on the machine body, a detector provided on the protector to detect an obstacle higher than the protector, and a controller configured or programmed to, when the detector detects the obstacle, perform at least one process to prevent the working device from contacting the obstacle.

公开(公告)号：US20240060274A1

公开(公告)日：2024-02-22

申请号：US18366677

申请日：2023-08-08

Applicant: KUBOTA CORPORATION

Inventor： Kohei NAGAO ,  Ryota HAMAMOTO

IPC: E02F9/22

CPC classification number: E02F9/2296 ,  E02F9/2228 ,  E02F9/2285

Abstract: A speed control method for a work vehicle, includes driving an engine to rotate a first hydraulic pump provided in the work vehicle. Hydraulic fluid from the first hydraulic pump is supplied to a first hydraulic motor to rotate the first hydraulic motor to drive a first traveling device provided in a vehicle body of the work vehicle. A rotational speed of the first hydraulic motor is detected. Feedback control with respect to the engine and a control valve configured to control a pilot pressure of the first hydraulic pump is performed. The feedback control being performed to reduce a speed difference between the rotational speed detected and a target rotational speed of the first hydraulic motor corresponding to a target vehicle speed. A feedback gain of the feedback control is set based on a first coefficient which becomes larger as the target rotational speed becomes lower.

公开(公告)号：US20230349402A1

公开(公告)日：2023-11-02

申请号：US18221055

申请日：2023-07-12

Applicant: KUBOTA CORPORATION

Inventor： Daiki ABE ,  Ryota HAMAMOTO ,  Hiroaki NAKAGAWA

IPC: F15B21/0423 ,  F01P7/04 ,  E02F9/22

CPC classification number: F15B21/0423 ,  F01P7/044 ,  E02F9/226 ,  F15B2211/62 ,  F15B21/02

Abstract: A working machine includes a prime mover, a hydraulic pump driven by power of the prime mover, a cooler including a cooling fan rotated by either the power of the prime mover or hydraulic fluid delivered from the hydraulic pump, and a controller configured or programmed to perform a reduction control for reducing a target fan rotation speed that is a target rotation speed of the cooling fan in response to reduction of an actual prime mover rotation speed that is an actual rotation speed of the prime mover, and to perform, after the reduction control, a restoration control for restoring the target fan rotation speed. The controller is configured or programmed to make a difference between a reduction rate of the target fan rotation speed in the reduction control and an increase rate of the target fan rotation speed in the restoration control.