Patents Assigned to YANMAR POWER TECHNOLOGY CO., LTD.
  • Publication number: 20230134654
    Abstract: A flow path switching valve includes a block-shaped body having a first opening and a second opening which communicate with each other via a linear first oil path, and a third opening which communicates with the first oil path via a linear second oil path; a valve body which is provided so as to be rotatable relative to the body, and in which a communication flow path is formed that allows two openings to communicate with each other depending on the rotation position; and a locking protrusion which regulates the rotation range of the valve body in order to select the rotation position of the valve body to be a predetermined rotation position where two openings of a predetermined combination among the three openings communicate with each other via the communication flow path of the valve body.
    Type: Application
    Filed: March 8, 2021
    Publication date: May 4, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventor: Soichiro SHIN
  • Patent number: 11635033
    Abstract: An engine includes an exhaust manifold, an intake manifold, and an EGR device configured to supply EGR gas from the exhaust manifold to the intake manifold. An EGR cooler is provided at a side of the exhaust manifold, and a longitudinal direction of the EGR cooler is in an up-down direction of the engine in a used state.
    Type: Grant
    Filed: October 28, 2021
    Date of Patent: April 25, 2023
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventors: Yu Matsui, Masato Kishiura
  • Patent number: 11634183
    Abstract: A hood of a tractor including a front grill, a light unit, and an upper cover is provided with a center pillar. The front grill is attached to the center pillar, the light unit is attached to the front grill, and the upper cover is supported by the center pillar. The hood is further provided with a side frame and a lower cover, where the side frame is attached to the center pillar, and the lower cover is attached to at least the upper cover and the side frame.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: April 25, 2023
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Yoshiaki Kurokawa
  • Publication number: 20230117450
    Abstract: A heat pump includes a first outdoor heat exchanger and a second outdoor heat exchanger which are mutually connected in parallel; a merge part at which refrigerant that has flown out from the first outdoor heat exchanger and the second outdoor heat exchanger is configured to merge; and a third outdoor heat exchanger that is connected to the merge part.
    Type: Application
    Filed: March 1, 2021
    Publication date: April 20, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventors: Norihiro OKUDA, Sachie TSUJIKAWA, Terunori AIKAWA, Shingo OKADA
  • Publication number: 20230124315
    Abstract: A work assistance system is a system used together with a work machine, wherein an estimation unit and an output unit are provided. The work machine has an engine as the power source thereof, and travels in a field. On the basis of at least the magnitude of the load of the engine, the estimation unit estimates whether there is an occurrence of a target event that accompanies fluctuations in the load. The output unit outputs output data corresponding to the estimation results from the estimation unit.
    Type: Application
    Filed: February 19, 2021
    Publication date: April 20, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventor: Kohei Nashiro
  • Publication number: 20230111557
    Abstract: An auto tensioner is supported on one side surface of a cylinder block 4-(the outer surface of a front wall part) via a bracket. The auto tensioner includes: a tension pulley that is pressed against a belt; an arm that rotatably supports the tension pulley and is swingably supported to the bracket; and a hydraulic actuator that is supported by the arm and bracket to adjust the pressing force of the tension pulley to the belt using a predetermined position of the arm as a supporting point. The hydraulic actuator is disposed outside the water pump 8-on the front wall part of the cylinder block.
    Type: Application
    Filed: February 17, 2021
    Publication date: April 13, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventor: Hiroaki NAGANAWA
  • Patent number: 11612094
    Abstract: The present describes a work vehicle where an operator can, on the work vehicle side, confirm which working machine is engaged and set which working machine to engage. A tractor, to which a working machine can be mounted, is provided with: a liquid crystal panel selectably displaying an engageable working machine mounted and displaying the currently engaged working machine so as to be identifiable; an operation unit (encoder dial, enter button, and command buttons) for carrying out selection and determination operations for the working machine displayed on the liquid crystal panel; and a control device that, when a determination operation is carried out by the operation unit for a desired working machine, disengages the currently engaged working machine, and configures the working machine for which the determination operation has been carried out to be engaged.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: March 28, 2023
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Toshiyuki Miwa
  • Publication number: 20230090880
    Abstract: An engine device includes an exhaust gas purification device above a cylinder head through a support pedestal. The support pedestal has a flat portion on which the exhaust gas purification device is mounted, and a plurality of legs which protrude downward form the flat portion and are fixed to the cylinder head. The flat portion and the leg portion are formed integrally. Portions between the legs are each formed in an arch-shape.
    Type: Application
    Filed: November 26, 2022
    Publication date: March 23, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventors: Yu Matsui, Naotoshi Furukawa
  • Publication number: 20230081284
    Abstract: An area registration method including setting information about a work vehicle that autonomously travels in a travel area; setting a work area which is included in the travel area and in which the work vehicle performs work; setting a headland area that is included in the travel area and is located on the outer side of the work area; and, when an operation for inputting the set information of the headland area is received after the work area and the headland area have been set, changing the sizes of the work area and the headland area on the basis of the inputted set information.
    Type: Application
    Filed: February 3, 2021
    Publication date: March 16, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventors: Yasuto Nishii, Taiki Shirafuji
  • Publication number: 20230083514
    Abstract: A remote controller including an emergency stop button that receives an emergency stop operation, a temporary stop button that receives a temporary stop operation, and a control unit that restarts the running of a tractor when a running restart operation is performed after the tractor has been temporary stopped, the running restart operation including a pressing operation for pressing the temporary stop button continuously for a first predetermined time and a release operation for releasing the pressing operation on the temporary stop button within a second predetermined time following the first predetermined time.
    Type: Application
    Filed: January 28, 2021
    Publication date: March 16, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventors: Shinya Nishibeppu, Takuya Iwase
  • Publication number: 20230084302
    Abstract: This construction machine comprises: includes a work machine; an automatic controller for automatically controlling the work machine according to design information; an operation lever for manually controlling the work machine; and an automatic switch mounted on the operation lever and alternatively switching between activation and deactivation of the automatic control. The manual control of the work machine has higher priority than the automatic control.
    Type: Application
    Filed: February 8, 2021
    Publication date: March 16, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventor: Kohei Okazaki
  • Patent number: 11603904
    Abstract: An engine device having a flywheel housing in which a flywheel that is rotated integrally with a crankshaft is accommodated on one side portion of a cylinder block, in which the cylinder block is integrally formed with housing bracket portions each protruding in a direction away from the crankshaft from each of opposite side portions of the cylinder block extending along a crankshaft axial direction, the housing bracket portions protruding from end portions of the opposite side portions close to the one side portion, and a space surrounded by the one side portion, the housing bracket portions, and the flywheel housing constitutes a gear case for accommodating therein a gear train.
    Type: Grant
    Filed: December 9, 2020
    Date of Patent: March 14, 2023
    Assignee: Yanmar Power Technology Co., Ltd.
    Inventor: Koki Kashiwa
  • Publication number: 20230072707
    Abstract: An engine including a main fuel injection valve, a pilot fuel injection valve, a liquid fuel supply rail pipe, and a pilot fuel supply rail pipe. The main fuel injection valve supplies liquid fuel from the liquid fuel supply rail pipe to a combustion chamber during combustion in a diffusion combustion system. The pilot fuel injection valve supplies pilot fuel from the pilot fuel supply rail pipe to the combustion chamber in order to ignite gaseous fuel during combustion in a premixed combustion system. The liquid fuel supply rail pipe is disposed at one side of an imaginary vertical plane including an axis of a crank shaft. The pilot fuel supply rail pipe is disposed at the side of the imaginary vertical plane at which the liquid fuel supply rail pipe is disposed.
    Type: Application
    Filed: November 11, 2022
    Publication date: March 9, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventors: Katsuhiro Nishimura, Koichi Hirose
  • Patent number: 11598234
    Abstract: This breather device separates engine oil included in a blow-by gas. The breather device comprises a first route, an acceleration route, a branching route, and turn-back routes. The blow-by gas flows to the first route. The acceleration route is connected to a downstream side of the first route, and has a flow channel cross-sectional area smaller than that of the first route. The branching route is connected to a downstream side of the acceleration route, configured including a wall part orthogonal to the acceleration route, and branched into two routes by the wall part. The turn-back routes are connected to one route branching at the branching route, and are turned back so as to be parallel to the acceleration route and to head in the opposite direction from a progressing direction.
    Type: Grant
    Filed: May 8, 2019
    Date of Patent: March 7, 2023
    Assignee: Yanmar Power Technology Co., Ltd.
    Inventors: Kota Takamatsu, Masato Sugimoto
  • Patent number: 11591775
    Abstract: Provided is a hydraulic circuit, for a construction machine, which drives an actuator by merging pressure oil from a fixed-volume pump into a center bypass oil path from a variable-volume pump to an oil tank, wherein the flow rate of flow from the fixed-volume pump to the center bypass oil path can be controlled in accordance with a requested flow rate of the actuator.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: February 28, 2023
    Assignees: Yanmar Power Technology Co., Ltd., Nabtesco Corporation
    Inventors: Junya Ono, Hiroshi Matsuyama, Naoto Kageyama, Hitoshi Iwasaki, Nanami Tukahara
  • Patent number: 11583127
    Abstract: A rice gel production system for producing rice gel in a form of a gel including: a cooking unit that cooks or steams raw-material rice to obtain cooked rice; a cooked rice conveyance unit that conveys the cooked rice; and a pulverizing unit that receives the cooked rice from the cooked rice conveyance unit and pulverizes the cooked rice to obtain rice gel. The pulverizing unit includes: a first pulverizing unit that pulverizes the cooked rice to obtain first pulverized rice; and a second pulverizing unit that pulverizes the first pulverized rice discharged from the first pulverizing unit, the pulverization by the second pulverizing unit being performed more finely as compared with the pulverization performed by the first pulverizing unit 100A to obtain the rice gel.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: February 21, 2023
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Kuniyasu Tsuchiya
  • Patent number: 11572677
    Abstract: A work vehicle allows an operator to easily check the vertical position and the angle of bucket. The work vehicle includes a front loader with a bucket, and freely raises/lowers and rotates the bucket. The work vehicle comprises a display disposed near an operator seat. The display is configured to display vertical position information and angle information of the bucket.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: February 7, 2023
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventor: Takumi Hasegawa
  • Publication number: 20230033387
    Abstract: An engine including an exhaust bypass valve and an intake bypass valve. The exhaust bypass valve is disposed in an exhaust bypass channel connecting an outlet of an exhaust manifold and an exhaust outlet of a turbocharger to each other. The intake bypass valve is disposed in an intake bypass channel connecting an inlet of an intake manifold and an inlet of the turbocharger. An intake pressure sensor detects a pressure of the intake manifold. If an instruction value indicating an upper limit or a lower limit of the valve opening degree of the intake bypass valve is continuously output for a predetermined time or more, an engine control device determines that an abnormality occurs in at least one of the exhaust bypass valve and the intake bypass valve.
    Type: Application
    Filed: October 6, 2022
    Publication date: February 2, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventors: Taishi Murakami, Masayoshi Doui
  • Publication number: 20230031053
    Abstract: Provided is an automatic travel system for a work vehicle, wherein: a control unit that causes the work vehicle to automatically travel according to a target path includes a target position setting unit that sets a target travel position to a predetermined position separated by a predetermined distance in an advancing direction from a current position of the work vehicle, and an automatic steering controller that controls operations of a steering unit so that that work vehicle follows the target travel position; and the target position setting unit determines whether the target travel position has reached an end position of a turning path connected to a straight path and, if a determination is made that the target travel position has reached the end position of the turning path, then changes the setting of the target travel position from the position on the turning path to a position on the straight path.
    Type: Application
    Filed: October 15, 2020
    Publication date: February 2, 2023
    Applicant: Yanmar Power Technology Co., Ltd.
    Inventors: Maroi Kodama, Yasuto Nishii
  • Patent number: 11566797
    Abstract: A subcooler is made up of a plate type heat exchanger. The accumulator is located between a compressor and the subcooler in a width direction of an outdoor unit in a planar view. The subcooler overlaps with the accumulator in the width direction in the planar view. As a result, a compact heat pump can be provided when the subcooler is a plate type heat exchanger.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: January 31, 2023
    Assignee: YANMAR POWER TECHNOLOGY CO., LTD.
    Inventors: Norihiro Okuda, Terunori Aikawa, Hirotoshi Kihara