A working vehicle includes a steering device to steer a vehicle body, a working device connected to the vehicle body, an automatic steering controller to perform automatic steering of the steering device based on a difference between a scheduled traveling line and a position of the vehicle body, and a parameter changer to change a control parameter of the automatic steering depending on the working device connected to the vehicle body.

An agricultural mowing machine includes a frame having a coupling device for coupling the machine to a tractor. A carrying arm is pivotally connected to the frame. A first hydraulic cylinder is configured to pivot the carrying arm relative to the frame. A lateral displacement structure is connected to the carrying arm in such a manner that the lateral displacement structure can be displaced relative to the carrying arm in a lateral direction between an inner position and an outer position. A second hydraulic cylinder is configured to move the lateral displacement structure relative to the carrying arm. A mowing unit is connected to the lateral displacement structure. The mowing unit can be moved between an approximately horizontal working position, a raised headland position, and a transport position. The first hydraulic cylinder and the second hydraulic cylinder are connected to each other in such a manner that when the mowing unit is in the transport position and the first or second hydraulic cylinder is actuated by pressurized hydraulic fluid, hydraulic fluid discharged from the first or second hydraulic cylinder is supplied under pressure to the other hydraulic cylinder for pivoting the carrying arm so as to move the mowing unit from the transport position towards the headland position displacing the lateral displacement structure outwards relative to the carrying arm simultaneously.

A tractor includes a hydraulic lifting and lowering driver to lift and lower a three-point linkage, a load detector to swing according to a traction load of an implement, and a mechanical linkage to transmit a swing amount of the load detector to the lifting and lowering driver. The mechanical linkage includes a first linkage on one side in a right-left direction of a vehicle body frame and interlockingly linked with the load detector, a second linkage on the other side in the right-left direction of the vehicle body frame and interlockingly linked with the lifting and lowering driver, and an operation cable interlockingly linking the first linkage and the second linkage.

Systems, devices, and methods for performing autonomous agricultural operations are described herein. An exemplary device may include a toolbar to which a plurality of implements may be interchangeably coupled, and a pair of parallel chassis beams mounted perpendicularly on the toolbar. At least a portion of each of the chassis beams may be telescopic and configured to be extended outward from, and retracted inward towards, the toolbar. The device may also include a plurality of drive assemblies each mounted on one of the chassis beams, and a plurality of motors corresponding to the drive assemblies and configured to drive the drive assemblies in accordance with one or more drive parameters to move the device throughout a site. The device may further include a computing device configured to automatically determine the drive parameters, and cause the plurality of motors to drive the corresponding drive assemblies in accordance with the drive parameters.

A storage system for storing hydraulic fluid used to drive hydraulically driven components of an agricultural implement and of filling the same are provided. The storage system includes a tank having an underside. The tank has a cavity in an interior thereof for receiving the hydraulic fluid therein. A quick connect coupling is operatively connected to the underside of the tank and has an output end in communication with the cavity in the tank and an input end connectable to a hydraulic fluid source. The quick connect coupling is configured to allow for flow from the input end to the output end thereof.

The invention relates to a method for increasing the load on driving rear wheels (KB, KP) of a tractor during soil cultivation with a farm implement (2), in particular with a plough (20), attached to a three-point linkage (1) of the tractor, in which the vertical position of the attached implement (2, 20) is adjusted relative to the tractor by means of the position of the arms (4) of a lifting device and the length of the upper link (13) of the three-point linkage (1) of the tractor is adjusted. After adjusting the length of the upper link (13) of the three-point linkage of the tractor the axial force acting/induced in the upper link (13) is determined and during travel of the tractor continuously monitored and automatically maintained at the adjusted value, whereby also the adjusted vertical position of the implement (2) attached to the tractor is continuously monitored (2) and is also automatically maintained at the adjusted value, thereby maintaining the vertical position of the attached implement (3) in this regulation and thus also constant ploughing depth.

In addition, the invention relates to a device for performing the above-mentioned method for increasing the load on driving rear wheels of tractors during soil cultivation.

A system, apparatus and method for providing task-specific ride-height control in a self-propelled agricultural product applicator utilize a controllable ride-height trailing arm suspension system for independently joining each wheel to a frame of the applicator. Each trailing arm suspension system includes upper and lower suspension arms, an extensible air strut, and an angular position sensor operatively interconnected to one another and disposed between a rolling axis of the ground engaging wheel independently supported by that suspension system and a point of attachment of the suspension system to the frame, such that the position sensor detects a relative angular position between the upper and lower suspension arms at a present extension of the air strut. An electronic control unit utilizes the angular positions detected by the sensors, in conjunction with a desired task input, to control the air struts in a manner providing a ride-height corresponding to the desired task input.

A system, apparatus and method for detecting and controlling the height of a frame of a self-propelled agricultural product applicator above a ground surface utilize a trailing link suspension system including an angular position sensor and extensible air strut, for connecting ground engaging wheels of the applicator to the frame of the applicator. Height of the applicator above the ground surface is determined by measuring relative angular rotation of upper and lower suspension arms of the suspension system about a suspension pivot axis, using the angular position sensor. Height is controlled by regulating a flow of pressurized air to the air strut, to thereby control extension of the air strut in a manner that controls a frame to axle, ride-height, distance of the suspension system.

A semi-closed loop hydraulic circuit includes a prime move, a first hydraulic circuit operatively coupled to the prime mover, and a second hydraulic circuit operatively coupled to the prime mover. The second hydraulic circuit is fluidly coupled to the first hydraulic circuit.

A work machine that has an implement coupled to the frame of the work machine, a first sensor coupled to the implement, a controller, and an implement position system that couples the implement to the frame. The first sensor identifies the orientation of the implement along more than one axis and the controller manipulates the implement position system to reposition the implement relative to the frame based on the orientation of the implement identified by the first sensor.