Patents by Inventor Ryota ENOMOTO
Ryota ENOMOTO has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11293164Abstract: A wheel loader includes a boom, a forward clutch, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for bringing the forward clutch into a semi-engagement state by controlling the hydraulic pressure of the hydraulic oil supplied to the forward clutch on condition that the wheel loader advances while raising the boom in at least a loaded state.Type: GrantFiled: August 10, 2017Date of Patent: April 5, 2022Assignee: KOMATSU LTD.Inventors: Ryota Enomoto, Masanori Ikari, Kentaro Yajima, Takuma Nishimura
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Publication number: 20220090357Abstract: A work machine control system includes an operational input portion that accepts an input operation to change a position of acceptance, maintains the position of acceptance when there is no input operation accepted, and provides an operation command in accordance with change in position of acceptance, an operational force providing portion that provides a plurality of operational forces in correspondence with an amount of change of the position of acceptance, a transmission portion that changes a speed of rotation provided from a drive source to transmit resultant rotation to a drive wheel, and a controller that controls the transmission portion based on a travel speed of the drive wheel in accordance with the operation command.Type: ApplicationFiled: November 19, 2019Publication date: March 24, 2022Applicant: KOMATSU LTD.Inventors: Naoki UCHIDA, Ryota ENOMOTO
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Publication number: 20220074169Abstract: A control device of a work vehicle includes a braking force function determination unit and a required braking force function determination unit. The braking force function determination unit determines at least one of an offset and an inclination for a required braking force in a braking force function which indicates a relationship between a rotational speed of an output shaft of a transmission and the required braking force and in which the required braking force monotonically increases with respect to the rotational speed such that the smaller a stage number of a selected speed stage which is input into a traction force instruction device, the larger an absolute value of at least one of the offset and the inclination. The required braking force function determination unit determines the required braking force based on the rotational speed of the output shaft of the transmission and the braking force function.Type: ApplicationFiled: March 31, 2020Publication date: March 10, 2022Inventors: Akira TAKENO, Ryota ENOMOTO, Koshiro KODO, Naoki UCHIDA, Shinobu SHIMANAKA, Shogo MIYAZAKI
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Publication number: 20200299923Abstract: A wheel loader includes a boom, a forward clutch, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for bringing the forward clutch into a semi-engagement state by controlling the hydraulic pressure of the hydraulic oil supplied to the forward clutch on condition that the wheel loader advances while raising the boom in at least a loaded state.Type: ApplicationFiled: August 10, 2017Publication date: September 24, 2020Applicant: KOMATSU LTD.Inventors: Ryota ENOMOTO, Masanori IKARI, Kentaro YAJIMA, Takuma NISHIMURA
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Patent number: 10550548Abstract: A wheel loader includes a forward clutch, an accelerator pedal, a brake pedal, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for reducing the hydraulic pressure of the hydraulic oil supplied to the forward clutch according to an operation amount of the brake pedal on condition that at least the brake pedal is operated while the accelerator pedal is being operated. The controller continues the clutch hydraulic pressure control even after the clutch shifts from a complete engagement state to a semi-engagement state by the clutch hydraulic pressure control.Type: GrantFiled: August 10, 2017Date of Patent: February 4, 2020Assignee: KOMATSU LTD.Inventors: Ryota Enomoto, Masanori Ikari, Kentaro Yajima, Takuma Nishimura
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Publication number: 20190112788Abstract: A wheel loader includes a forward clutch, an accelerator pedal, a brake pedal, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for reducing the hydraulic pressure of the hydraulic oil supplied to the forward clutch according to an operation amount of the brake pedal on condition that at least the brake pedal is operated while the accelerator pedal is being operated. The controller continues the clutch hydraulic pressure control even after the clutch shifts from a complete engagement state to a semi-engagement state by the clutch hydraulic pressure control.Type: ApplicationFiled: August 10, 2017Publication date: April 18, 2019Applicant: KOMATSU LTD.Inventors: Ryota ENOMOTO, Masanori IKARI, Kentaro YAJIMA, Takuma NISHIMURA
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Publication number: 20190039577Abstract: A work vehicle includes a target speed setting unit configured to set a desired target speed, a travel speed detecting unit configured to detect a travel speed of a vehicle body, an engine, a work implement attached to the vehicle body and driven by an output of the engine, a travel device, a brake disposed between the travel device and the engine and configured to brake the travel device, a clutch disposed between the engine and the brake and configured to transmit or interrupt power from the engine to the travel device, and a controller configured to reduce a difference between the travel speed and the target speed by controlling an engagement pressure of the clutch and an engagement pressure of the brake.Type: ApplicationFiled: March 30, 2017Publication date: February 7, 2019Inventors: Takuma NISHIMURA, Manabu TSUDA, Eiji YAMAGUCHI, Ryota ENOMOTO
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Patent number: 9878733Abstract: A steering device of a working vehicle includes a lever, a first switch, a lever support member, a second switch, and a control device. The first switch sets a steering signal to be in a valid/invalid state. The lever support member is provided so as to be able to flip up from a certain position of performing tilting operation. The second switch attains conduction when the lever support member is located at the certain position, and attains non-conduction in conjunction with the case where the lever support member is flipped up. The control device sets steering with use of the lever to be valid/invalid. The first switch has a plurality of terminals which respectively attain conduction of a steering signal in accordance with a setting of a valid state and an invalid state and are electrically connected to the control device in parallel with the second switch.Type: GrantFiled: May 29, 2014Date of Patent: January 30, 2018Assignee: KOMATSU LTD.Inventor: Ryota Enomoto
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Patent number: 9458603Abstract: A level selecting unit is a device for selecting a tractive force level from a plurality of levels when a velocity stage of a transmission is a first velocity. The plurality of levels includes at least a first level and a second level. A control unit controls the engine. When the velocity stage of the transmission is the first velocity and the first level is selected, the control unit controls the engine on the basis of a first tractive force characteristic. The first tractive force characteristic prescribes a relationship between the vehicle speed and the tractive force of the vehicle. When the velocity stage of the transmission is the first velocity and the second level is selected, the control unit controls the engine on the basis of a second tractive force characteristic. The tractive force is reduced more in the second tractive force characteristic than in the first tractive force characteristic.Type: GrantFiled: October 31, 2014Date of Patent: October 4, 2016Assignee: KOMATSU LTD.Inventor: Ryota Enomoto
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Publication number: 20160236704Abstract: A steering device of a working vehicle includes a lever, a first switch, a lever support member, a second switch, and a control device. The first switch sets a steering signal to be in a valid/invalid state. The lever support member is provided so as to be able to flip up from a certain position of performing tilting operation. The second switch attains conduction when the lever support member is located at the certain position, and attains non-conduction in conjunction with the case where the lever support member is flipped up. The control device sets steering with use of the lever to be valid/invalid. The first switch has a plurality of terminals which respectively attain conduction of a steering signal in accordance with a setting of a valid state and an invalid state and are electrically connected to the control device in parallel with the second switch.Type: ApplicationFiled: May 29, 2014Publication date: August 18, 2016Inventor: Ryota ENOMOTO
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Publication number: 20160122977Abstract: A level selecting unit is a device for selecting a tractive force level from a plurality of levels when a velocity stage of a transmission is a first velocity. The plurality of levels includes at least a first level and a second level. A control unit controls the engine. When the velocity stage of the transmission is the first velocity and the first level is selected, the control unit controls the engine on the basis of a first tractive force characteristic. The first tractive force characteristic prescribes a relationship between the vehicle speed and the tractive force of the vehicle. When the velocity stage of the transmission is the first velocity and the second level is selected, the control unit controls the engine on the basis of a second tractive force characteristic. The tractive force is reduced more in the second tractive force characteristic than in the first tractive force characteristic.Type: ApplicationFiled: October 31, 2014Publication date: May 5, 2016Inventor: Ryota ENOMOTO