Abstract: An engine includes: a cylinder block in which a cooling water passage is formed; an oil cooler accommodated in an accommodation part provided in the cooling water passage and having a plurality of cores for cooling an engine oil; a first oil pipe and a second oil pipe configured to support an oil inflow port and an oil ejection port of each of the cores; a cooling water inflow port provided in a lower portion of one end portion of the accommodation part relative to a front-and-rear direction; a cooling water outflow port provided in an upper portion of the accommodation part; and a cooling water inflow passage having an inclined portion inclined downward and connecting to the cooling water inflow port.

Abstract: According to the present invention, a maintenance management system includes an acquisition unit, and an output unit. The acquisition unit acquires an actual operation time of a target work machine including a plurality of management units. The output unit outputs maintenance information regarding the maintenance time for at least one management unit among the plurality of management units, by using a virtual operation time, for each management unit, derived from the actual operation time.

Abstract: The purpose of the present invention is to improve visibility of a status display unit while simplifying the installation of the status display unit and preventing damage to the status display unit. The present invention comprises: a work vehicle body capable of traveling automatically; a status detection unit that detects the status of the work vehicle body; and status display units that show a status display according to the status of the work vehicle body detected by the status detection unit. At least one pair of status display units are arranged diagonally across the work vehicle body in plan view.

Abstract: An engine includes: an exhaust manifold 7 close to one of left and right side surfaces of an engine; a turbocharger 60 having an exhaust-side inlet connected to the exhaust manifold 7; and a rocker-arm-chamber-integrated intake manifold 8 being disposed on an upper surface of a cylinder head 5 and integrally including a rocker arm chamber 90 and an intake manifold 6. The intake manifold 8 has a wall 101 dividing the rocker arm chamber 90 close to the one of the left and right side surfaces of the engine 1 and the intake manifold 6 close to the other of the left and right side surfaces to isolate the rocker arm chamber 90 and the intake manifold 6 from each other. The rocker arm chamber 90 has, in its upper portion, a positive crankcase ventilation device 69 protruding therefrom and being configured to return blowby gas to an intake system.

Abstract: A tractor including: an engine mounted on a traveling body; a post-processing device configured to purify exhaust gas of the engine; and a tail pipe long in an up-down direction and configured to emit exhaust gas having passed through the post-processing device to the outside. The post-processing device is arranged in a standing posture in front of an operation unit on the traveling body so that the exhaust gas flows from the bottom to the top. An upwardly protruding outlet pipe is provided on an upper surface side of the post-processing device. The inner diameter of an exhaust gas inlet side of the tail pipe is set larger than the outer diameter of the outlet pipe which is inserted and communicated with the exhaust gas inlet side of the tail pipe.

Abstract: An engine operable in a premixed combustion system and a diffusion combustion system. The engine includes a main fuel injection valve, a pilot fuel injection valve, a liquid fuel tank, a main fuel supply path, a pilot fuel supply path, a pilot fuel filter, a pilot fuel high-pressure pump, a pilot fuel tank, and a pilot fuel supply pump. The pilot fuel tank stores pilot fuel sent from the pilot fuel high-pressure pump and not injected by the pilot fuel injection valve. This pilot fuel is sent to an automatic backwash filter and a pilot fuel filter while not passing through the liquid fuel tank.

Abstract: An automatic travel system for a work vehicle wherein: when, at the time that a work vehicle reaches an entry area for a parallel path, a condition-assessing unit determines that a starting condition for a first automatic travel control has been met, an automatic travel control unit executes the first automatic travel control for causing the work vehicle to travel automatically along the parallel path in a working state; and when the condition-assessing unit determines that the starting condition for the first automatic travel control has not been met, the automatic travel control unit executes an automatic position adjustment travel control for causing the work vehicle to make a position adjustment by a composite operation of forward/backward switching operations and steering operations of the work vehicle so that the starting condition for the first automatic travel control is met.

Abstract: This traveling support system includes a guideline setting unit that sets, in a field, a plurality of guidelines respectively extending in parallel with a plurality of outer peripheries that divides the field; a straight guide line setting unit that sets, in the field, a plurality of straight guidance lines extending in parallel with each other with a distance therebetween; a traveling control unit that automatically advances a work vehicle along the straight guidance lines and cancels the automatic advancing according to an operation of a steering wheel by an operator to enable the work vehicle to be manually steered; and an operation display unit that superimposes and displays the plurality of guidelines, the plurality of straight guidance lines, and the current position of the work vehicle together with the shape of the field.

Abstract: A gas-side stop valve on the gas refrigerant side and a liquid-side stop valve on the liquid refrigerant side are provided in a package of an outdoor unit. A gas-side filter on the gas refrigerant side is mounted on the indoor unit side relative to the gas-side stop valve and inside the package of the outdoor unit. A liquid-side filter 9 on the liquid refrigerant side is mounted on the indoor unit side relative to the liquid-side stop valve and inside the package of the outdoor unit. As a result, it is not necessary to ensure a place for mounting the gas-side filter and the liquid-side filter at the time of installation on site and the workability can be improved.

Abstract: A parallel travel work system for an autonomous travel work vehicle, an accompanying travel work vehicle accompanying the autonomous travel work vehicle, and a remote controller for communicating with the autonomous travel work vehicle. The remote controller creates a first preset travel path for the autonomous travel work vehicle and a second preset travel path for the accompanying travel work vehicle travels. The autonomous travel work vehicle is equipped with: a position calculator for calculating a position of the autonomous travel work vehicle using a satellite positioning system, a steering actuator for operating a steering device of the autonomous travel work vehicle, a transceiver for communicating with the remote controller, and a control device for controlling the position calculator, the steering actuator and the transceiver. With the control device, the autonomous travelling of the autonomous travel work vehicle is carried out along the first preset travel path.

Abstract: A server configured to, upon receiving from a user terminal a work relief request demand with respect to a predetermined work plan, select from among work reliever candidates a work reliever candidate who possesses a farm machine required for carrying out the predetermined work plan, and to notify the selected work reliever candidate that the relief request has been made. A work reliever candidate terminal configured to, upon being notified by the server that the relief request has been made, display the predetermined work plan and be able to provide the server with the intention of the work reliever candidate using the work reliever candidate terminal.

Abstract: An engine device including an intake manifold configured to supply air into a cylinder; an exhaust manifold configured to output exhaust gas from the cylinder; a gas injector which mixes a gaseous fuel with the air supplied from the intake manifold; and a main fuel injection valve configured to inject a liquid fuel into the cylinder for combustion. At the time of switching from a gas mode in which the gaseous fuel is supplied into the cylinder to a diesel mode in which the liquid fuel is supplied into the cylinder, a supply-start timing of the liquid fuel is delayed relative to a supply-stop timing of the gaseous fuel.

Abstract: A cylinder head includes: an exhaust port configured to lead out exhaust gas from combustion chamber; an intake port configured to introduce fresh air into the combustion chamber; and an EGR gas passage in which EGR gas flows, wherein exhaust outlets of the exhaust port and an EGR gas inlet of the second EGR pipe are located on a first side of the cylinder head and, and a fresh air inlet communicated to the intake port and an EGR gas outlet of the EGR gas passage are located on a second side which is opposite from the first side.

Abstract: The present invention enables generating a desired target travel path intended by a user or the like without the need for various input works for the type, width, and the like of a work machine.

Abstract: A wireless communication terminal device for operating a work vehicle that autonomously travels includes: a device main body 70 having a display 74 that is capable of accepting a touch panel operation; and an emergency-stop remote controller 71 having an emergency stop button 72 that is used to stop autonomous travel of the work vehicle. The device main body 70 and the emergency-stop remote controller 71 perform wireless communication with the work vehicle via different wireless communication networks having different communication schemes, respectively.

Abstract: The present invention is provided with a path generation unit that generates an operation path for each of a plurality of operation regions, and an automatic travel control unit that causes an operation vehicle to travel automatically along the operation path generated by the path generation unit. The path generation unit is configured to be able to generate a movement path that connects different operation regions by causing the operation vehicle to travel outside the operation regions. The automatic travel control unit is configured to temporarily stop the operation vehicle before switching the traveling path on which the operation vehicle travels automatically from a path inside the operation regions to a path outside the operation regions, and in response to the temporary stop state being terminated, cause the operation vehicle to travel automatically by switching the traveling path to a path outside the operation regions.

Abstract: A work screen display system including a position information obtaining unit for obtaining position information on a work vehicle based on positioning correction information supplied from a first reference station; a region shape determination unit for determining a shape of a specific region where the work vehicle performs autonomous travel, based on positioning correction information supplied from a second reference station; and a display control unit for displaying, on a display unit, a specific region indication section indicating the specific region determined by the region shape determination unit. The display control unit displays the specific region indication section in a display mode that varies between a case where the first and second reference stations are identical and a case where the first and second reference stations are not identical.

Abstract: A propulsion system includes at least a first propeller and a second propeller. The propulsion system further includes a first engine configured to directly driving the first propeller and a second engine configured to directly driving the second propeller. The propulsion system further includes a first electric motor provided between the first engine and the first propeller, and a second electric motor provided between the second engine and the second propeller. When the first engine is stopped, the first propeller is configured to be driven by the first electric motor that rotates by power generated by the second electric motor.

Abstract: A ship propulsion system provides a first power transmission device that transmits power from an internal combustion engine to a propeller, a second power transmission device that transmits power from an electric motor to a propeller and that is mounted to the hull so as to be able to turn up and down independently from the first power transmission device, an actuator for causing the second power transmission device to turn up and down, and a control device. The control device is configured so as to be able to select a first drive mode in which the internal combustion engine is driven and the electric motor is not driven, and a second drive mode in which the internal combustion engine is not driven and the electric motor is driven. When the first drive mode is selected, the actuator is operated so that the second power transmission device turns up.