Abstract: A turbo-Brayton refrigeration machine (11) includes a first circulation path (L1) in which a first refrigerant circulates, a second circulation path (L2) in which a second refrigerant which is a cooling target circulates, a subcooler (22) disposed over the first circulation path (L1) and the second circulation path (L2) and configured to have a single heat-exchanging unit, and an expansion turbine (21) positioned on a primary side of the subcooler (22) in the first circulation path (L1), in which the pressure ratio of the expansion turbine (21) is the pressure ratio at which the outlet temperature of the expansion turbine (21) is higher than a freezing point of the second refrigerant.

Abstract: A work vehicle is presented with which it is possible to prevent an operator from being mislead in cases where the positioning status frequently changes. This work vehicle is provided with: a positioning unit that receives a positioning signal from a satellite positioning system, and measures the work vehicle position on the basis of the positioning signal; a control unit that determines the positioning accuracy on the basis of the positioning status of the positioning unit, and permits autonomous travel when the positioning accuracy is at least a prescribed accuracy; and a notification unit that executes, in accordance with a control performed by the control unit, a first notification indicating that the positioning accuracy is a first accuracy that is at least a prescribed accuracy and a second notification indicating that the positioning accuracy is a second accuracy that is at least a prescribed accuracy.

Abstract: A work vehicle is presented with which it is possible to prevent an operator from being mislead in cases where the positioning status frequently changes. This work vehicle is provided with: a positioning unit that receives a positioning signal from a satellite positioning system, and measures the work vehicle position on the basis of the positioning signal; a control unit that determines the positioning accuracy on the basis of the positioning status of the positioning unit, and permits autonomous travel when the positioning accuracy is at least a prescribed accuracy; and a notification unit that executes, in accordance with a control performed by the control unit, a first notification indicating that the positioning accuracy is a first accuracy that is at least a prescribed accuracy and a second notification indicating that the positioning accuracy is a second accuracy that is at least a prescribed accuracy.

Abstract: The present invention is configured to comprise a position-measuring unit that uses a satellite positioning system to acquire position information regarding a work vehicle, wherein: a current-supplying pathway includes a first current-supplying pathway capable of supplying current to an electrical component, such as the position-measuring unit, from a battery via a first switch, and a second current-supplying pathway capable of supplying current to the position-measuring unit at least from the battery via a second switch; when the first switch is in an ON state, either the first current-supplying pathway or the second current-supplying pathway supplies current to the position-measuring unit from the battery; and when the first switch is in an OFF state, the second current-supplying pathway supplies current to the position-measuring unit from the battery via the second switch in an ON state.

Abstract: The present invention comprises: a transmission device that shifts output to a travel unit from an engine by changing the position of a slide gear; a motor that changes the position of a ride gear; a cross-lever main transmission lever that is operable in the front-rear and left-right directions and is biased to return to a neutral operation position; and a control device that is configured so as to actuate the motor in response to the front-rear operation of the main transmission lever to switch the shift position of the transmission device and vary the function to be performed by the left-right operation of the main transmission lever according to the shift position of the transmission device.