Abstract: A work vehicle includes a cabin to cover an operator's seat on a traveling body. A cabin frame that constitutes a framework of the cabin includes a pair of left and right front pillars, a pair of left and right rear pillars, a front beam, a rear beam, and side beams. The front beam couples upper end portions of the front pillars to each other. The rear beam couples upper end portions of the rear pillars to each other. Each of the side beams couples to each other upper end portions of each of the front pillars and each of the rear pillars that stand at a front and rear. The rear beam is formed to have a U-shaped cross-section by presswork of a metal plate material.

Abstract: An internal combustion engine including: an operating state detection unit that detects an operating state of the internal combustion engine; a fuel reforming unit configured to be supplied with a liquid fuel including hydrocarbon and generate a reformed fuel having an octane number larger than that of the supplied liquid fuel; a reformed fuel composition adjusting unit that adjusts the composition of the reformed fuel generated by the fuel reforming unit; and a control device that controls the composition of the reformed fuel by controlling the reformed fuel composition adjusting unit in accordance with the operating state detected by the operating state detection unit.

Abstract: An engine device including an engine capable of coping with both a premix combustion mode in which premixed fuel obtained by mixing fuel with air in advance is supplied into a cylinder and combusted and a diffusion combustion mode in which liquid fuel is injected into the cylinder and combusted. The engine device further includes a gas supply device configured to supply the gaseous fuel into the cylinder in the premix combustion mode; a pilot injection device configured to inject the liquid fuel into the cylinder in the premix combustion mode; and a main injection device configured to inject the liquid fuel into the cylinder in the diffusion combustion mode. The liquid fuel is injected from the main injection device and the liquid fuel is injected from the pilot injection device during the diffusion combustion mode, thus diagnosing failure in the pilot injection device.

Abstract: A construction machine in which an electrical unit can be reliably cooled at low cost by effectively utilizing an intake pipe connected to an intake port of an engine. This construction machine includes: an engine; and a hood covering the engine, wherein a space inside the hood has a placement space in which an electrical unit is placed and which communicates with outside air, and a distal-end opening of an intake pipe connected to an inlet port of the engine is disposed in the placement space to cause outside air sucked into the intake pipe due to a suction pressure occurred in the intake pipe to pass through the placement space to form a cooling air path in the placement space.

Abstract: A system for monitoring fruit growth including: a vibration exciter that imparts predetermined vibration to a stem or a branch between a fruit and a stalk growing on a plant; a vibration sensor that detects vibration of the stem or the branch caused by the vibration imparted by the vibration exciter; and a detector that detects a weight or weight change of the fruit based on a frequency of the vibration detected by the vibration sensor.

Abstract: An ECU includes a cooling water temperature sensor, an intake air temperature sensor, a storage unit, a determination unit, and a calibration unit. In an after-run control performed after the internal combustion engine stops, the determination unit compares a cooling water temperature Tw detected by the cooling water temperature sensor with a first threshold value T1 and determines that the environment is not the cold environment in which an EGR differential pressure sensor is likely to be frozen, if the cooling water temperature Tw is equal to or higher than the first threshold value T1, or if the cooling water temperature Tw is less than the first threshold value T1 but is equal to or higher than a second threshold value T2 which is lower than the first threshold value T1 and an intake air temperature Ta from the intake air temperature sensor is equal to or higher than a third threshold value T3, and determines that the environment is the cold environment otherwise.

Abstract: An engine (1) includes a cylinder head (3), a retainer (80), a pressing member (70), and an injector (40). The cylinder head (3) has an attachment hole (15) formed therein. The retainer (80) is attached to the cylinder head (3). The pressing member (70) has a pressed surface (77) configured to be pressed by the retainer (80). The injector (40) is inserted into the attachment hole (15) and has an indentation (46) configured to be pressed by the pressing member (70). The indentation (46) is arranged inside the attachment hole (15). The pressed surface (77) is arranged outside the attachment hole (15).

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: 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.

Abstract: A GNSS antenna 26 and an inertial measurement unit 25 are placed at a longitudinal center of a unit base 55 mountable onto a work vehicle. A wireless communication unit 27 is placed at the longitudinal one end side of the unit base 55. A wireless communication antenna 28 of the wireless communication unit 27 is placed in a front part of the unit base 55, which is located on the front side of a vehicle body when the unit base 55 is mounted on the work vehicle. The GNSS antenna 26 is provided above the inertial measurement unit 25.

Abstract: An engine including a common rail attached to one side portion of a cylinder block that pivotally supports a crankshaft in a rotatable manner, the one side portion extending along a crankshaft center, and the common rail being configured to supply a fuel to the engine. A flywheel housing that accommodates a flywheel that is rotated integrally with the crankshaft is disposed in one side portion out of opposite side portions of the cylinder block intersecting the one side portion. One end portion of the common rail is disposed above the flywheel housing.

Abstract: A terminal device for use in a software rewriting system configured to rewrite a software package of a control device, including a storage unit configured to store one or more pieces of source code in a text format for generating one or more pieces of object code in a binary format executable by the control device. The terminal device retrieves a piece of difference source code which is a difference in a piece of source code corresponding to a current piece of object code stored in the storage unit, generates a latest piece of source code based on the piece of difference source code retrieved and the one or more pieces of source code stored in the storage unit, converts the latest piece of source code into a latest piece of object code, and transmits the latest piece of object code obtained from the conversion to the control device.

Abstract: The objective of the present invention is to provide 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.

Abstract: An engine speed control device performing: a first PID gain calculation step of calculating a target engine speed to thereby calculate a first PID gain based on an engine speed deviation between the target engine speed and an engine speed; a target rack position calculation step of correcting the first PID gain based on a cooling water temperature to thereby calculate a target rack position of a fuel injection pump; a second PID gain calculation step of calculating a second PID gain based on a rack position deviation between the target rack position and a rack position; and a rack control signal producing step of correcting the second PID gain based on a lubricating oil temperature to thereby produce a rack control signal. The engine speed control device thus controls an engine speed by controlling the rack position based on the rack control signal.

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: A fuel injection pump for a diesel engine, including: a control rack arranged in a rack chamber formed between a pump head and a pump housing, and configured to adjust a fuel injection amount; a transmission shaft rotatably supported by a transmission shaft hole formed in the pump housing; and a lubricating oil passage formed in the pump housing, and configured to pressure-feed lubricating oil between the transmission shaft and the transmission shaft hole. The transmission shaft has an oil passage therein through which passage the lubricating oil pressure-fed to the lubricating oil passage partially passes, a first opening of the oil passage is communicated with the lubricating oil passage, and a second opening of the oil passage is formed on the outer circumferential surface of an upper portion of the transmission shaft, nearby the control rack.

Abstract: An internal combustion engine including a fuel reformation unit that generates reformed fuel based on liquid fuel and higher in octane rating than the liquid fuel and introduces the generated reformed fuel to an output cylinder. The fuel reformation unit includes a first fuel reformer that includes a reciprocal mechanism where a piston reciprocates in a cylinder, a second fuel reformer that includes a reformation catalyst, and a reformed gas passage that connects the first and second fuel reformers together. First reformed gas discharged from the first fuel reformer is introduced to the second fuel reformer through the reformed gas passage.

Abstract: A terminal device for use in a software rewriting system configured to rewrite a software package of a control device mounted on a movable object, including: a wide area communication unit configured to communicate with a server via a wide area network; a storage unit; and a short-range wireless communication unit configured to communicate with the movable object via a short-range wireless communication network. The updating software package is received, via the wide area network and the wide area communication unit, from a server including an updating software database storing the updating software packages for updating the software package of the control device. The updating software package received from the server is stored in the storage unit. The updating software package stored in the storage unit is transmitted to the movable object, via the short-range wireless communication unit and a short-range wireless communication network.

Abstract: While providing the control such that the air excess ratio falls within the stoichiometric range, if the throttle opening degree control means determines that a value of the torque is smaller than A [Nm], the throttle opening degree control means provides a first control of controlling the opening degree of the intake throttle valve such that the output shaft rotates at a constant first rotation number. If the throttle opening degree control means determines that the value of the torque is larger than A [Nm], the throttle opening degree control means provides a second control of controlling the opening degree of the intake throttle valve such that the rotation number of the output shaft becomes larger.

Abstract: An exhaust gas purification device including: a first case communicating with an exhaust manifold of an engine and internally including a first exhaust gas purification body for removing a carbon compound; and a second case communicating with an exhaust outlet of the first case and internally including second exhaust gas purification bodies for removing a nitrogen compound. The first case and the second case are arranged above the engine and in an L-shape to respectively extend along two side surfaces of the engine, the two side surfaces being adjacent to each other.