Yanmar Holdings Patente

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[Problem]To provide a work machine in which an insufficient driving force of an axle and a working unit is less likely to occur, or a work machine in which an appropriate arrangement of an electric motor and an inverter unit is easily achieved.[Solution]The work machine 3 includes a machine body frame, a first electric motor 41, a second electric motor 42, an inverter unit 43, a power transmission mechanism 35, and an oil tank 12. An axle 34 is mounted on the machine body frame. The first electric motor 41 generates power for driving the axle 34. The inverter unit 43 drives the first electric motor 41 by electric power supplied from the battery unit. The power transmission mechanism 35 transmits power generated by the first electric motor 41 to the axle 34. The second electric motor 42 drives the hydraulic pump 11 that feeds hydraulic oil to the hydraulic actuator. The oil tank 12 stores hydraulic oil. The first electric motor 41 is located between the second electric motor 42 and the oil tank 12 in a plan view. At least a part of the power transmission mechanism 35 is located between the first electric motor 41 and the inverter unit 43 in a plan view.

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[Problem] To provide a method for controlling a working machine and a working machine that can be easily made multifunctional.[Solution] The method for controlling a working machine 3 controls the supply of a working fluid to an actuator that drives a driven object by a pilot signal Si0 of an operation system generated according to the operation of an operation device 2, thereby moving the driven object bidirectionally between a first position and a second position. The method for controlling the working machine 3 includes preventing a flow of the working fluid in the direction to move the driven object from the second position to the first position by a backflow prevention circuit 7. The method for controlling the working machine 3 is characterized by further including disabling the backflow prevention circuit 7 by the pilot signal Si0 generated during a specific operation, thereby allowing the flow of the working fluid in the direction to move the driven object from the second position to the first position.

[Problem] To provide an automatic traveling method, an automatic traveling system, and an automatic traveling program, by which it is possible to improve work efficiency of a work by a work vehicle traveling automatically.[Solution] An automatic traveling method includes causing a work vehicle 10 to automatically travel according to a target route R in a farm field F, changeably setting a threshold value of a deviation including at least one of a position deviation and an orientation deviation of the work vehicle 10 with respect to the target route R, and causing the work vehicle 10 to execute a correction operation for correcting the deviation if the deviation exceeds the threshold value.

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[Problem] To provide a work machine capable of preventing fluttering of a door in a fully open state and reducing a manufacturing cost of a cabin by enabling the cabin to be used in common for support bodies different in size.[Solution] A hydraulic excavator as a work machine includes a cabin that covers a driver's seat and a support body that supports the cabin. The cabin has a center pillar that extends in an up-down direction and a door that is rotatably supported by the center pillar in such a manner to be opened forward. The support body has a lock device that holds the door when the door is in a fully open state.

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[Problem] There is provided an exhaust system capable of sufficiently exhausting a fuel leakage gas leaked from a marine internal combustion engine without diffusing the fuel leakage gas into an engine room. [Solution] An exhaust system according to an aspect of the present disclosure includes: an exhaust duct provided above a marine internal combustion engine installed in an engine room of a ship; and a suction fan that sucks a fuel leakage gas leaking from the marine internal combustion engine into the inside of the exhaust duct from an engine upper unit side of the marine internal combustion engine. The exhaust duct exhausts the fuel leakage gas sucked by the suction fan to the outside of the engine.

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