Abstract: This engine diagnosis system is an engine diagnosis system for diagnosing a state of an engine included in a vehicle in accordance with an operating state of the engine and includes a data acquisition unit configured to acquire a detection value related to a parameter indicating the operating state of the engine a plurality of times at time intervals, a diagnosis unit configured to diagnose the state of the engine based on the detection value acquired by the data acquisition unit; and a result output unit configured to output a diagnosis result in the diagnosis unit, in which the diagnosis unit includes a determination unit configured to determine whether or not a failure has occurred in the engine based on a moving average of a plurality of the detection values acquired at time intervals and the latest detection value acquired by the data acquisition unit.

Abstract: A position at which a transport machine is to unload materials at a work site is appropriately determined. The transport machine transports the materials at the work site. A sensor detects an accumulated body of the materials accumulated on the ground at the work site. A controller provides a command for an operation of the transport machine. The controller recognizes the accumulated body on the basis of a detection result of the sensor and determines a position at which the transport machine is to unload the materials at the work site on the basis of information regarding the accumulated body.

Abstract: A control system for a work machine includes a key switch that is operated to be in one operation state of a key-off state, a key-on state, and a key-start state, an electric fan that generates an airflow for cooling an object to be cooled that is part of a work machine, and a controller that maintains the electric fan in a predetermined state in the key-on state.

Abstract: Provided is a control device of a work machine including a revolving body configured to revolve around a revolution center, and a work implement including a work tool and attached to the revolving body, in which, in a case where an instruction signal outputted by an operation unit configured to output an instruction signal concerning an automatic operation including the work implement is inputted into the control device, and an automatic operation assigned to the inputted instruction signal is equal to an automatic operation that can be performed on a basis of information regarding the work tool, the control device performs the automatic operation of the inputted instruction signal.

Abstract: The engine diagnosis system is an engine diagnosis system that diagnoses a state of an engine included in a vehicle in accordance with an operating situation of the engine, and includes a data acquisition unit that acquires a detection value related to a parameter indicating an operating state of the engine a plurality of times at time intervals, a filtering unit that extracts the detection value acquired in an operation state of the engine satisfying a preset condition from the plurality of detection values acquired by the data acquisition unit, a diagnosis unit that diagnoses the state of the engine based on the detection value extracted by the filtering unit, and a result output unit that outputs a diagnosis result in the diagnosis unit.

Abstract: A work machine includes a power supply device connected to an external power supply, a battery charged by the power supply device, an electric motor configured to be driven based on at least one of electric power supplied from the external power supply and electric power supplied from the battery, and a controller configured to vary the electric power supplied from the external power supply to the electric motor to follow electric power usage of the electric motor.

Abstract: An exhaust gas purification device includes a throttle valve provided in a path through which an exhaust gas discharged from an engine flows, a rotational speed of the engine being controlled in accordance with an operation of an accelerator, a diesel oxidation catalyst device disposed on a downstream side of the throttle valve, a selective reduction catalyst device disposed on a downstream side of the diesel oxidation catalyst device, a fuel injection device that injects fuel on an upstream side of the diesel oxidation catalyst device, and a control device that inputs temperature data indicating an inlet temperature and an outlet temperature of the diesel oxidation catalyst device and controls the throttle valve and the fuel injection device.

Abstract: A control system (200) includes an imaging device (107) that is provided in a work machine (100) and captures imaging data showing a work implement (160), and a processor (210). The processor acquires the imaging data from the imaging device and identifies a shape of a work tool (163), based on the imaging data. The processor controls the work machine, based on the shape, such that the work tool does not come into contact with a virtual wall (VW), which is a surface that prohibits entry of the work implement.

Abstract: A controller specifies a diagnosed portion to be diagnosed in a motor grader based on candidate information of an abnormality candidate in the motor grader, specifies a first sensor connection position of a diagnosis sensor for diagnosis of the diagnosed portion, and controls a display apparatus to display position information of the first sensor connection position.

Abstract: A control system for a work vehicle capable of switching between a manned operation state and an unmanned control state includes an in-vehicle controller and a retarder mechanism that generates a braking force for decelerating the work vehicle. The in-vehicle controller switches from the manned operation state to the unmanned control state in a state where the retarder mechanism is in an operative state.

Abstract: A spur gear as a mechanical component is made of steel containing 0.12 mass % or more and 0.28 mass % or less of carbon, 0.15 mass % or more and 0.70 mass % or less of silicon, 0.20 mass % or more and 0.95 mass % or less of manganese, and 0.85 mass % or more and 1.90 mass % or less of chromium, with the balance being iron and inevitable impurities, and having a martensitic structure, and includes a carburized layer disposed so as to constitute at least a part of a surface and having a higher carbon concentration than the other portion. The carburized layer includes a composite oxide film disposed so as to constitute the surface, having a thickness of 1 ?m or more and 25 ?m or less, and containing magnetite and hematite.

Abstract: A system including an engine operable with a fuel containing hydrogen includes: a crankcase of the engine; an engine intake passage through which air is suctioned into the engine; a crankcase intake passage that branches from the engine intake passage and through which the air is introduced into the crankcase; a dilution air valve disposed in the crankcase intake passage and configured to open and close the crankcase intake passage; a compressor disposed upstream of a branch portion at which the crankcase intake passage branches from the engine intake passage; a hydrogen sensor configured to detect hydrogen concentration inside the crankcase; a crankcase exhaust passage through which the air inside the crankcase is discharged; and a control device configured to control opening and closing of the dilution air valve based on the hydrogen concentration detected by the hydrogen sensor.

Abstract: A path of traveling in a case where excavation and loading work is automatically controlled is appropriately set. An object around the work machine main body includes an excavation target that is a heap of material excavated by a work implement and a loading target onto which the material is loaded. A controller that generates a travel path of a travel body recognizes the loading target on the basis of a detection result of a sensor, recognizes a loading position in a case where the material is loaded on the loading target, and calculates a minimum distance by which an excavation position at which a work machine excavates the excavation target is to be separated from the loading position by a dimension of the work machine.

Abstract: Provided is a control device of a work machine including a revolving body configured to revolve around a revolution center, and a work implement including a work tool and attached to the revolving body, in which, in a case where an instruction signal outputted from an operation unit and concerning an automatic operation including the work implement is inputted, the control device determines an automatic operation that is able to be performed from among a plurality of automatic operations, on a basis of information concerning the work tool, and performs the automatic operation determined to be able to be performed.

Abstract: A control system for a work machine includes: a revolving body; a work implement attached to the revolving body; a revolving parking brake that can stop revolving of the revolving body; a revolving lock input device operated to activate the revolving parking brake; an automatic control command generator that outputs an automatic control command for automatically controlling the revolving body and the work implement; and an automatic permission controller that determines whether the automatic control is possible based on an operation state of the revolving lock input device.

Abstract: A posture detection sensor detects a posture of a work implement. A controller identifies an unloading point and a passing point on a route through which a bucket passes during revolution of a revolving body, based on a detection result of the posture detection sensor, sets a position shifted from the passing point to a side opposite to the unloading point as a corrected passing point, and performs control such that the bucket passes through the corrected passing point during the revolution.

Abstract: A system includes: a crankcase and a cylinder head of an engine operable with a fuel containing hydrogen; an engine intake passage through which air is suctioned into the engine; a crankcase intake passage branching from the engine intake passage and through which the air is introduced into the crankcase; a dilution air valve disposed in the crankcase intake passage and configured to open and close the crankcase intake passage; a compressor disposed upstream of a branch portion at which the crankcase intake passage branches from the engine intake passage; a hydrogen sensor configured to detect hydrogen concentration inside the crankcase; a communication path configured to allow an inside of the crankcase to communicate with an inside of the cylinder head; and a control device configured to control opening and closing of the dilution air valve based on the hydrogen concentration detected by the hydrogen sensor.

Abstract: A system for controlling a work machine that includes a work implement and is driven by electricity from a power storage device includes an operation device configured to operate the work implement and a controller. The controller acquires an operation command from the operation device, detects a remaining amount of power stored in the power storage device, and outputs a control signal to slow a rise of an operation speed of the work implement in response to the operation command from the operation device when it is determined that the detected remaining amount of power stored in the power storage device is equal to or less than a predetermined threshold.

Abstract: A work implement is attached to a work machine body. A plurality of strain sensors are arranged along a portion of the work implement that intersects with a virtual plane. A controller estimates a load state of the working implement based on strain data detected by the plurality of strain sensors.

Abstract: A work machine includes: a boom; a cylinder including a bottom chamber and a head chamber; a pump including a suction port and a discharge port; a hydraulic oil tank; an operation valve including a pump port connected to the discharge port, a bottom port connected to the bottom chamber, a head port connected to the head chamber, a tank port connected to the hydraulic oil tank, and a regenerative port connected to the suction port via a regenerative line; an accumulator connected to the regenerative line via an accumulator line; a switching valve that adjusts a flow rate of hydraulic oil in the accumulator line; and a controller that controls the boom operation valve and the switching valve so that hydraulic oil emitted from the bottom chamber is distributed to each of the suction port and the accumulator in a lowering operation of the boom.