A work vehicle includes a fuel tank, a control module, a fuel access detection device, a fuel level sensor, and a reaction assembly. The fuel access detection device detects the accessibility of the fuel, and transmits a first signal indicative of the accessibility of the fuel to the control module. The fuel level sensor detects a volume of the fuel, and transmits a second signal related to the volume of the fuel to the control module. The reaction assembly is coupled to the control module and performs a first reaction and a second reaction after the first reaction. In the first reaction the reaction assembly is commanded by the control module based on the first signal, and in the second reaction the reaction assembly is commanded by the control module based on the second signal when the volume of the fuel is changed.

A tractor includes an engine, a transmission coupled to the engine, a hydraulic pump driven by the engine, at least one of a tractor implement, attachment, or control moved by the hydraulic pump, a sensor, and a controller coupled to the transmission. The controller is configured to downshift the transmission based on a signal from the sensor.

A hydraulic excavator includes an engine hood covering an engine from above and a vent member disposed inside the engine hood. The engine hood includes a third side plate. The third side plate is provided with a lower side vent hole group, and simultaneously, a region located laterally to the lower side vent hole group is imperforate. The vent member covers the lower side vent hole group with a first opening from inside. A second opening of the vent member communicates with an interior of the engine hood. The vent member upwardly tilts toward the engine hood.

A hollow first accommodating case (28) is provided on a front part of a revolving frame (5) at a position on a front side of a fuel tank (23), and a fuel supply pump (34) for supplying a fuel stored in an external fuel storage source to the fuel tank (23) is provided on the fuel tank (23) by being connected. A fuel suction port (35) for sucking the fuel toward the fuel supply pump (34) is provided in the first accommodating case (28) by being opened to an outside, and a urea water tank (25) is provided by being accommodated in the first accommodating case (28). A water supply port (25G) of a urea water is provided in the urea water tank (25) by being opened to the outside, and the fuel suction port (35) and the water supply port (25G) of the urea water are juxtaposed and arranged in the first accommodating case (28).

A main controller 28 performs automatic stop control to stop an engine in a case where a preset automatic stop condition is satisfied, and includes a power source control processing section 283 controlling power supplied from a capacitor to an electric or electronic facility 70. The power source control processing section 283 estimates a charge amount by which the capacitor 40 is charged by the alternator 41 while an engine 9 is in operation, estimates an electric discharge amount corresponding to power supplied from the capacitor 40 to the electric or electronic facility 70 while the engine 9 is stopped under the automatic stop control, and stops supply of power from the capacitor 40 to the electric or electronic facility 70 when the electric discharge amount is determined to be larger than the charge amount while the engine 9 is stopped under the automatic stop control. This allows reliable suppression of degradation of the capacitor while the engine is under the automatic stop control.

A system for proactively controlling a rimpull limit of a machine includes a hydraulic system having a lift cylinder to move an implement; a lift cylinder pressure sensor that senses a hydraulic pressure of the lift cylinder and responsively produces a lift cylinder pressure signal; and a controller in operable communication with the power train and the lift cylinder pressure sensor. The controller is configured to receive the lift cylinder pressure signal; determine the rimpull limit based at least in part upon the lift cylinder pressure signal; and adjust the torque of the power train to the rimpull limit.

A traveling device (11) is provided with an electric motor (16) provided in a vehicle body (2) of a dump truck (1), an output shaft (17) an axial base end of which is connected to the electric motor (16) and which outputs rotation of the electric motor (16), a bottomed hole spline (53) formed in an axial front end of the output shaft (17), and an input shaft (42) which has a shaft spline (54) spline-coupled to the hole spline (53), and inputs the rotation of the output shaft (17) to a reduction gear mechanism (27). The output shaft (17) is provided with an oil reservoir space (55) formed in the innermost part of the hole spline (53), an annular oil groove (56) and an oil path (57) providing communication between the oil reservoir space (55) and the annual oil groove (56). Lubricant oil (100) supplied to the annular oil groove (56) is supplied via the oil path (57) to the oil reservoir space (55), and is supplied to a spline joint between the hole spline (53) and the shaft spline (54) with rotation of the output shaft (17).

A depth guidance system for a work vehicle can be provided. In one example, the depth guidance system can include a depth sensor for detecting a depth of a work tool coupled to the work vehicle. The depth guidance system can include a first indicator light configured to illuminate in a first color indicating that the work tool is above a target depth-range. The depth guidance system can also include a second indicator light configured to illuminate in a second color indicating that the work tool is within the target depth-range. The depth guidance system can receive sensor signals from the depth sensor indicating that the work tool is at various depths and responsively activate a corresponding one of the first indicator light or the second indicator light for each depth among the various depths of the work tool.

A display system includes: a work machine image generation unit that generates, on the basis of detection data of a position of a work machine including working equipment and detection data of attitude of the work machine, a work machine image representing a virtual viewpoint image of the work machine viewed from a virtual viewpoint outside the work machine; a transport vehicle image generation unit that generates, on the basis of detection data of a position of a transport vehicle and detection data of attitude of the transport vehicle, a transport vehicle image representing a virtual viewpoint image of the transport vehicle viewed from the virtual viewpoint; a combining unit that generates a combined image in which the work machine image and the transport vehicle image are superimposed; and a display control unit that causes the combined image to be displayed on a display apparatus present outside the work machine.

A method for controlling an engagement of a lock-up clutch (LUC) of a torque converter of a machine is disclosed. The method includes detecting a pedal tap of a pedal, wherein the pedal tap is detected when the pedal is depressed from a position corresponding to a pedal displacement less than a first threshold displacement to a position corresponding to a pedal displacement greater than a second threshold displacement, and then released to a position corresponding to a pedal displacement less than the first threshold displacement within a threshold time duration. The method further includes causing the LUC to move to the LUC unlocked position if the pedal tap is detected.