A working vehicle includes a steering handle, a vehicle body to travel with either manual steering by the steering handle or automatic steering of the steering handle based on a traveling reference line, an operator provided to the vehicle body, and a controller to terminate the automatic steering when the operator is operated under the automatic steering.

A method for estimation of relative coordinates between two parts of a linked vehicle system. The system includes a towing vehicle and a towed implement or trailer. A first sensor is configured to measure the movement rate of the towing vehicle while a second sensor is configured to measure the movement rate of the towed implement. Both sensors interact with each other to measure the absolute distance between sensors. Using the known linkage geometry, relative distance between the sensors and relative rotation rates, the relative coordinates between the towing vehicle and towed implement can be estimated.

An implement operating apparatus has a U-shaped drive frame supported on drive wheels, each pivotally mounted about a vertical wheel pivot axis. A steering control selectively pivots each drive wheel. A power source is connected through a drive control to rotate the drive wheels in either direction. First and second implements are configured to perform implement operations and to rest on the ground and when the drive frame is maneuvered to an implement loading position with respect to each implement, the implement is connectable to the drive frame and movable to an operating position supported by the drive frame. When the implement is in the operating position, the steering and drive controls are operative to move and steer the drive frame and implement along a first travel path or a second travel path oriented generally perpendicular to the first travel path.

A controller for a harvester receives a speed of the harvester, the pitch, the yaw and the roll of the vehicle body, compares the sensed yaw, pitch and roll of the vehicle body to respective acceptable yaw, pitch and roll ranges. The controller also receives a conveyor position respect to the vehicle body, compares the conveyor position to an acceptable range of conveyor positions, calculates a center of gravity of the harvester based upon the yaw, pitch, roll and conveyor position, and compares the speed of the harvester to an acceptable range of speeds based upon the calculated center of gravity of the harvester. The controller also sends a signal to move the conveyor with respect to the vehicle body, alert the user to move the conveyor with respect to the vehicle body, reduce the speed of the harvester, or alert the user to reduce the speed of the harvester.

A work machine, with a frame member, a ground engaging mechanism coupled to the frame member and configured to at least partially contact an underlying surface, a sensor coupled to the ground engaging mechanism, the sensor positioned to identify a displacement of the ground engaging mechanism relative to the frame, a controller in communication with the sensor, and a location system in communication with the controller. Wherein, the controller marks a location that corresponds with the position of the ground engaging mechanism, the location being identified by the location system when the sensor identifies the displacement of the ground engaging mechanism.

A working vehicle includes a vehicle body to travel, a steering handle to be turned to steer the vehicle body, and a steering switch to steer the vehicle body separately from the steering handle. The steering switch may be a switch to be operated in a pressing manner or in a sliding manner to steer the vehicle body. In addition, the steering switch may be arranged around the steering handle.

An articulated tractor comprises a front frame, a rear frame articulated to the front frame by a central articulation, and a pivotable hitch carried by one of the front frame and the rear frame. The hitch is pivoted during steering. Front wheels are offset from the rear part of the tractor.

An implement operating apparatus has a U-shaped drive frame supported on drive wheels, each pivotally mounted about a vertical wheel pivot axis. A steering control selectively pivots each drive wheel. A power source is connected through a drive control to rotate the drive wheels in either direction. First and second implements are configured to perform implement operations and to rest on the ground and when the drive frame is maneuvered to an implement loading position with respect to each implement, the implement is connectable to the drive frame and movable to an operating position supported by the drive frame. When the implement is in the operating position, the steering and drive controls are operative to move and steer the drive frame and implement along a first travel path or a second travel path oriented generally perpendicular to the first travel path.

A work vehicle includes a memory, a sensor, circuitry, and a display. The memory is to store a target travel route in a work field. The sensor is to detect an actual travel track of the work vehicle to find a traveled portion of the target travel route, along which the work vehicle has traveled. The circuitry is configured to calculate an index value indicating a degree of a deviation of the actual travel track from the target travel route. The display is to display the traveled portion such that a display pattern to display the traveled portion is changed according to the index value.

Agricultural implement having a tow bar device for towing the implement with a towing vehicle includes an implement part that trails the tow bar device mounted so as to be pivotable about a first pivot axis. The first pivot axis is parallel to a horizontal transverse axis of the implement. The trailing implement part and the tow bar device are coupled by means of at least one first actuator. The tow bar device, by means of the first actuator, is pivotable about the first pivot axis in such a manner that a tilt angle between the tow bar device and the trailing implement part is adjustable.