Patents by Inventor Eiji Ishibashi
Eiji Ishibashi 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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Publication number: 20190093315Abstract: A work vehicle control system includes an actual topography acquisition device, a storage device, and a controller. The actual topography acquisition device acquires actual topography information, which indicates the actual topography of a work target. The storage device stores design topography information, which indicates a final design topography that is a target topography of the work target. The controller acquires the actual topography information from the actual topography acquisition device. The controller acquires the design topography information from the storage device. The controller generates a command signal to move the work implement to a position that is between the actual topography and the final design topography, and a predetermined distance above the actual topography.Type: ApplicationFiled: July 25, 2017Publication date: March 28, 2019Inventors: Eiji ISHIBASHI, Akifumi INAMARU, Yasuhito YONEZAWA, Takahiro SHIMOJO
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Publication number: 20190085529Abstract: When a current landscape includes an upward slope and a downward slope existing ahead of the upward slope, a controller determines a virtual design surface including a first design surface inclined at a smaller angle than the upward slope and a second design surface inclined with respect to the first design surface at a smaller angle than the downward slope. The controller generates a command signal that causes a work implement to move along the virtual design surface.Type: ApplicationFiled: July 26, 2017Publication date: March 21, 2019Inventors: Eiji ISHIBASHI, Junji HARADA, Akifumi INAMARU, Seiji NAGANO, Yasuhito YONEZAWA
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Publication number: 20190078298Abstract: A sensor outputs a signal indicating an excavation start position at which a work implement starts excavation. A controller determines an inclination angle of a virtual design surface so that an amount of soil between the virtual design surface extending from the excavation start position and a current landscape matches a predetermined target amount of soil. The controller generates a command signal that causes the work implement to move along the virtual design surface extending from the excavation start position in a direction inclined at the inclination angle.Type: ApplicationFiled: July 26, 2017Publication date: March 14, 2019Inventors: Eiji ISHIBASHI, Kazuhiro HASHIMOTO, Akifumi INAMARU, Yosuke KOGAWA
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Publication number: 20190078301Abstract: A work vehicle control system includes an actual topography acquisition device, a storage device, and a controller. The actual topography acquisition device acquires actual topography information, which indicates an actual topography of a work target. The storage device stores design topography information, which indicates a final design topography that is a target topography of the work target. The controller acquires the actual topography information from the actual topography acquisition device. The controller acquires the design topography information from the storage device. When the actual topography positioned below the final design topography is sloped, the controller generates a command signal to move the work implement along a locus positioned below the final design topography and below the actual topography, and a sloped locus that is positioned below the final design topography and above the actual topography.Type: ApplicationFiled: July 25, 2017Publication date: March 14, 2019Inventors: Eiji ISHIBASHI, Akifumi INAMARU, Kenji YAMAMOTO, Yasuhito YONEZAWA, Yosuke KOGAWA
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Publication number: 20190078296Abstract: A controller acquires an excavation start position at which a work implement starts excavation. When a current landscape includes an upward slope and a downward slope existing ahead of the upward slope and the excavation start position is on the upward slope, the controller determines a first virtual design surface including a first design surface located below the current landscape and inclined at a smaller angle than the upward slope. The controller generates a command signal that causes the work implement to move along the first virtual design surface.Type: ApplicationFiled: July 26, 2017Publication date: March 14, 2019Inventors: Eiji ISHIBASHI, Junji HARADA, Akifumi INAMARU, Seiji NAGANO, Yasuhito YONEZAWA
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Publication number: 20190078297Abstract: A work vehicle control system includes an actual topography acquisition device, a storage device, and a controller. The actual topography acquisition device acquires actual topography information, which indicates an actual topography of a work target. The storage device stores design topography information, which indicates a final design topography that is a target topography of the work target. The controller acquires the actual topography information from the actual topography acquisition device. The controller acquires the design topography information from the storage device. The controller generates a command signal to move the work implement along a locus that is more gently sloped than the actual topography when the actual topography positioned below the final design topography is sloped.Type: ApplicationFiled: July 25, 2017Publication date: March 14, 2019Inventors: Eiji ISHIBASHI, Akifumi INAMARU, Seiji NAGANO, Kenji YAMAMOTO, Yasuhito YONEZAWA, Yosuke KOGAWA, Takahiro SHIMOJO
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Publication number: 20190071846Abstract: A controller calculates a virtual design surface including a first design surface extending from an excavation start position in a traveling direction of a work vehicle and a second design surface further extending from the first design surface in the traveling direction. The controller generates a command signal that causes the work implement to move along the virtual design surface. The controller changes a position of the first design surface so that the first design surface extends along the current landscape or is located below the current landscape when the first design surface is located above the current landscape.Type: ApplicationFiled: July 26, 2017Publication date: March 7, 2019Inventors: Eiji ISHIBASHI, Akifumi INAMARU, Yosuke KOGAWA
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Publication number: 20180171598Abstract: When correcting an error caused by deviation of an attitude detection device with respect to a work machine including a swing body which swings, a working implement being attached to the swing body, the attitude detection device outputting an attitude of the work machine, the error is corrected by using a first position which is a position of a part of the work machine when the work machine is in a first attitude and a second position which is a position of the part when the work machine is in a second attitude.Type: ApplicationFiled: October 28, 2015Publication date: June 21, 2018Inventors: Tsutomu IWAMURA, Masanobu SEKI, Masashi ICHIHARA, Kenjiro SHIMADA, Satoru SHINTANI, Yuki SHIMANO, Eiji ISHIBASHI
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Patent number: 9222236Abstract: A bulldozer includes a blade pivotably attached to a vehicle body, a blade operation lever, and a blade control section. The blade operation lever outputs a lowering instruction signal, a holding instruction signal, and a raising instruction signal for the blade. The blade control section controls a height of the blade according the signal input. The blade control section can lower the blade to a predetermined position when the lowering instruction signal and the holding instruction signal are input in order after a transmission has been switched from a state, which is different from an advancing state, to the advancing state. The blade control section can raise the blade to a predetermined position when the raising instruction signal and the holding instruction signal are input in order after a transmission has been switched from a state, which is different from a reversing state, to the reversing state.Type: GrantFiled: May 28, 2013Date of Patent: December 29, 2015Assignee: KOMATSU LTD.Inventors: Eiji Ishibashi, Hidehiro Hashimoto, Kenji Yamamoto, Yasuhito Yonezawa, Fumio Imamura, Kenjiro Shimada
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Patent number: 9091342Abstract: A control device controls a hydrostatic transmission vehicle having a hydrostatic transmission including a variable displacement pump and a variable displacement hydraulic motor. The control device is configured to set a set vehicle speed based on a forward/rearward travel command and a gear stage command instructed by an operator, to set a torque limit usable for the hydrostatic transmission based on an engine speed, to set a vehicle speed limit based on a pressure in the hydraulic circuit and the torque limit, to select a lower one of the set vehicle speed and the vehicle speed limit, and to control respective displacements of the variable displacement pump and the variable displacement hydraulic motor based on the selected vehicle speed.Type: GrantFiled: March 14, 2014Date of Patent: July 28, 2015Assignee: KOMATSU LTD.Inventors: Eiji Ishibashi, Masayuki Mukaino, Shigeru Yamamoto, Yoshitaka Onodera, Takao Ishihara
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Publication number: 20150066317Abstract: A control device controls a hydrostatic transmission vehicle having a hydrostatic transmission including a variable displacement pump and a variable displacement hydraulic motor. The control device is configured to set a set vehicle speed based on a forward/rearward travel command and a gear stage command instructed by an operator, to set a torque limit usable for the hydrostatic transmission based on an engine speed, to set a vehicle speed limit based on a pressure in the hydraulic circuit and the torque limit, to select a lower one of the set vehicle speed and the vehicle speed limit, and to control respective displacements of the variable displacement pump and the variable displacement hydraulic motor based on the selected vehicle speed.Type: ApplicationFiled: March 14, 2014Publication date: March 5, 2015Inventors: Eiji ISHIBASHI, Masayuki MUKAINO, Shigeru YAMAMOTO, Yoshitaka ONODERA, Takao ISHIHARA
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Publication number: 20140257646Abstract: A bulldozer includes a blade pivotably attached to a vehicle body, a blade operation lever, and a blade control section. The blade operation lever outputs a lowering instruction signal, a holding instruction signal, and a raising instruction signal for the blade. The blade control section controls a height of the blade according the signal input. The blade control section can lower the blade to a predetermined position when the lowering instruction signal and the holding instruction signal are input in order after a transmission has been switched from a state, which is different from an advancing state, to the advancing state. The blade control section can raise the blade to a predetermined position when the raising instruction signal and the holding instruction signal are input in order after a transmission has been switched from a state, which is different from a reversing state, to the reversing state.Type: ApplicationFiled: May 28, 2013Publication date: September 11, 2014Applicant: KOMATSU LTD.Inventors: Eiji Ishibashi, Hidehiro Hashimoto, Kenji Yamamoto, Yasuhito Yonezawa, Fumio Imamura, Kenjiro Shimada
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Patent number: 8725364Abstract: A control device controls a hydrostatic transmission vehicle having a hydrostatic transmission including a variable displacement pump and a variable displacement hydraulic motor. The control device is configured to set a set vehicle speed based on a forward/rearward travel command and a gear stage command instructed by an operator, to set a torque limit usable for the hydrostatic transmission based on an engine speed, to set a vehicle speed limit based on a pressure in the hydraulic circuit and the torque limit, to select a lower one of the set vehicle speed and the vehicle speed limit, and to control respective displacements of the variable displacement pump and the variable displacement hydraulic motor based on the selected vehicle speed.Type: GrantFiled: September 28, 2009Date of Patent: May 13, 2014Assignee: Komatsu Ltd.Inventors: Eiji Ishibashi, Masayuki Mukaino, Shigeru Yamamoto, Yoshitaka Onodera, Takao Ishihara
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Patent number: 8532888Abstract: A control device controls a hydrostatic transmission vehicle having a hydrostatic transmission with a variable displacement pump and a variable displacement hydraulic motor. The control device is configured to set a set vehicle speed based on a forward/rearward travel command and a gear stage command instructed by an operator, to set an upper limit of the engine speed with respect to the set vehicle speed for limiting the upper limit of the engine speed to a predetermined partial engine speed set to be lower than a high idle engine speed when the set vehicle speed is in a preliminarily set low and intermediate speed range, and to control respective displacements of the variable displacement pump and the variable displacement hydraulic motor based on the set vehicle speed for allowing a vehicle speed to reach the set vehicle speed even when the engine is rotated at the partial engine speed.Type: GrantFiled: September 28, 2009Date of Patent: September 10, 2013Assignee: Komatsu Ltd.Inventors: Eiji Ishibashi, Masayuki Mukaino, Shigeru Yamamoto, Yoshitaka Onodera, Takao Ishihara
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Publication number: 20110202243Abstract: A control device controls a hydrostatic transmission vehicle having a hydrostatic transmission with a variable displacement pump and a variable displacement hydraulic motor. The control device is configured to set a set vehicle speed based on a forward/rearward travel command and a gear stage command instructed by an operator, to set an upper limit of the engine speed with respect to the set vehicle speed for limiting the upper limit of the engine speed to a predetermined partial engine speed set to be lower than a high idle engine speed when the set vehicle speed is in a preliminarily set low and intermediate speed range, and to control respective displacements of the variable displacement pump and the variable displacement hydraulic motor based on the set vehicle speed for allowing a vehicle speed to reach the set vehicle speed even when the engine is rotated at the partial engine speed.Type: ApplicationFiled: September 28, 2009Publication date: August 18, 2011Applicant: KOMATSU LTD.Inventors: Eiji Ishibashi, Masayuki Mukaino, Shigeru Yamamoto, Yoshitaka Onodera, Takao Ishihara
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Publication number: 20110196585Abstract: A control device controls a hydrostatic transmission vehicle having a hydrostatic transmission including a variable displacement pump and a variable displacement hydraulic motor. The control device is configured to set a set vehicle speed based on a forward/rearward travel command and a gear stage command instructed by an operator, to set a torque limit usable for the hydrostatic transmission based on an engine speed, to set a vehicle speed limit based on a pressure in the hydraulic circuit and the torque limit, to select a lower one of the set vehicle speed and the vehicle speed limit, and to control respective displacements of the variable displacement pump and the variable displacement hydraulic motor based on the selected vehicle speed.Type: ApplicationFiled: September 28, 2009Publication date: August 11, 2011Applicant: KOMATSU LTD.Inventors: Eiji Ishibashi, Masayuki Mukaino, Shigeru Yamamoto, Yoshitaka Onodera, Takao Ishihara
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Patent number: 7818110Abstract: A traveling control device and a traveling control program for a work vehicle in which a change in a control quantity due to an effect of vehicle body vibrations is small, fixing the desired control quantity is possible, and the control quantity can be matched with the operator's feel. A travel control program in which a first line on which the speed ratio reduces corresponding to a change in the operation stroke, a second line having hysteresis with respect to the first line and on which the speed ratio increases corresponding to a change in the operation stroke, and third lines on which the speed ratio changes corresponding to the change in the operation stroke and the change in speed ratio with respect to the change in the operation stroke is smaller than that of the first and the second line are set is installed in the control device.Type: GrantFiled: March 28, 2005Date of Patent: October 19, 2010Assignee: Komatsu Ltd.Inventors: Eiji Ishibashi, Yoshitaka Onodera, Hidehiro Hashimoto, Yoshiyuki Hirosawa, Toshihiko Fukasawa, Yutaka Sugimoto
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Patent number: 7685900Abstract: A vehicle mounted with a continuous stepless transmission having a continuous stepless transmission and a controlling section for performing speed-changing operation of the continuous stepless transmission, the speed change ratio of the continuous stepless transmission being switchable by a speed change operation section, includes: a shift-mode-switching section which switches the mode of a speed change ratio switching, the speed change ratio switching being performed by the speed change operation section, between a first mode for switching the speed change ratio in stages among a plurality of preset speed change ratios and a second mode for switching the speed change ratio continuously or substantially continuously; in which the controlling section further includes a vehicle speed setting section which sets a target vehicle speed at least based on the speed change operation signal detected by operating the speed change operation section and a mode signal detected by switching the shift-mode-switching sectionType: GrantFiled: December 3, 2004Date of Patent: March 30, 2010Assignee: Komatsu Ltd.Inventors: Toshihiko Fukasawa, Eiji Ishibashi, Ikuzo Mochida, Hidehiro Hashimoto, Masato Oura
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Publication number: 20070198158Abstract: Even when an operation device with a short operation stroke range is adopted, so that a change in a control quantity (speed ratio) due to an effect of vehicle body vibrations or similar is small and it is possible to fix the desired control quantity (speed ratio), and moreover the control quantity (speed ratio) can be obtained in accordance with the operator's feel when carrying out fine adjustments by increasing and decreasing an operation stroke. A controller 20 calculates the speed ratio in accordance with a relationship L1 shown in FIG. 3, and controls the speed ratio. A travel control program in which the following are set and that carries out the calculation is installed in the controller 20.Type: ApplicationFiled: March 28, 2005Publication date: August 23, 2007Applicant: Komatsu Ltd.Inventors: Eiji Ishibashi, Yoshitaka Onodera, Hidehiro Hashimoto, Yoshiyuki Hirosawa, Toshihiko Fukasawa, Yutaka Sugimoto
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Publication number: 20070111851Abstract: A vehicle mounted with a continuous stepless transmission having a continuous stepless transmission and a controlling section for performing speed-changing operation of the continuous stepless transmission, the speed change ratio of the continuous stepless transmission being switchable by a speed change operation section, includes: a shift-mode-switching section which switches the mode of a speed change ratio switching, the speed change ratio switching being performed by the speed change operation section, between a first mode for switching the speed change ratio in stages among a plurality of preset speed change ratios and a second mode for switching the speed change ratio continuously or substantially continuously; in which the controlling section further includes a vehicle speed setting section which sets a target vehicle speed at least based on the speed change operation signal detected by operating the speed change operation section and a mode signal detected by switching the shift-mode-switching sectionType: ApplicationFiled: December 3, 2004Publication date: May 17, 2007Inventors: Toshihiko Fukasawa, Eiji Ishibashi, Ikuzo Mochida, Hidehiro Hashimoto, Masato Oura