A method to prevent drift in an agricultural implement. Drift is when one side of an agricultural implement is further behind or further ahead of the other side of the agricultural implement in a direction of travel. Drift can be controlled by increasing a downforce on the side that is further ahead, decreasing force on the side that is further behind, or a combination of both. The force can be a moment of force.

A method is provided for detecting inadmissible operating states of a work hydraulics of an agricultural tractor. The method includes providing at least one electrically actuated control valve, a branch allocated to the at least one control valve, and an operating unit for the manual actuation of the work hydraulics of a front linkage. The method also includes connecting the at least one electrically actuated control valve to a hydraulic consumer via a hydraulic coupling, supplying hydraulic fluid to a hydraulic lifting device of the front linkage, detecting a state variable indicative of a connection state of the hydraulic coupling by a sensor unit and communicated to a control unit, and deactivating the operating unit if the control unit identifies by way of the evaluation of the state variable that a hydraulic consumer is connected to the hydraulic coupling.

A method is provided for detecting inadmissible operating states of a work hydraulics of an agricultural tractor. The method includes providing at least one electrically actuated control valve, a branch allocated to the at least one control valve, and an operating unit for the manual actuation of the work hydraulics of a front linkage. The method also includes connecting the at least one electrically actuated control valve to a hydraulic consumer via a hydraulic coupling, supplying hydraulic fluid to a hydraulic lifting device of the front linkage, detecting a state variable indicative of a connection state of the hydraulic coupling by a sensor unit and communicated to a control unit, and deactivating the operating unit if the control unit identifies by way of the evaluation of the state variable that a hydraulic consumer is connected to the hydraulic coupling.

A method for operating a working vehicle-working device combination having a part system for adjusting the working vehicle-working device combination includes determining a motor torque of a motor of the working vehicle-working device combination based on a motor parameter, determining a first loss torque based on at least one motor loss parameter of the motor, determining a second loss torque based on at least one load parameter of a load system of the working vehicle-working device combination, determining an output torque of the working vehicle-working device combination based on the motor torque and the first and second loss torques, and performing a control operation on the working vehicle-working device combination or on the part system based on the output torque.

A plough comprising: a plough body; an actuator mechanism that is configured to adjust a pitch angle of the plough body; and a controller. The controller is configured to: determine an actuator-control-signal for setting the pitch angle of the plough body based on control-data; and provide the actuator-control-signal to the actuator mechanism.

An agricultural implement comprising: a ground engaging tool; and an actuator mechanism (366; 466; 566). The actuator mechanism is configured to provide a bias force to the ground engaging tool such that it is biased towards a working position. The agricultural implement also includes a controller that is configured to automatically set the level of the bias force that is provided by the actuator mechanism based on control-data.

A stability control system identifies an actionable condition, such as instability, in an off-road mobile machine, based upon an in-rubber tire sensor. A remedial action is identified, and a control signal is generated to control the mobile machine to take the remedial action.

An agricultural vehicle and method of controlling the same are provided, the vehicle having a motive power unit providing a driving torque to at least one driven wheel and having at least one tyre or track frictionally coupled with the periphery of the driven wheel. A vehicle operating parameter is controlled in dependence on the driving torque and a slippage characteristic relating the respective driving torque at which the frictional coupling between driven wheel and tyre or track begins to slip for a range of vehicle operating parameter values. The operating parameter is suitably a tyre pressure or track tension, and the control may involve reducing driving torque or increasing pressure/tension to prevent slipping.

An autonomous hydraulic expansion and contraction apparatus comprises a fixing unit, a cylinder unit, a support unit, a piston unit, a valve unit and oil supply parts. By controlling the expansion and contraction length of the support part by a simple manipulation of the valve part by moving the lever, the autonomous hydraulic expansion and contraction apparatus can be easily expanded and contracted to the combined length of the expansion and contraction equipment, and additionally, the convenience of use can be enhanced.

Position and draft control mechanism (30) for an implement coupled to vehicle hitch (50) is provided. Position and draft control mechanism (30) includes a position control mechanism (300) and a draft control mechanism (400). The position control mechanism (300) includes a position control lever assembly (302), a locking arrangement (304), a linkage mechanism (306), a locking member position control mechanism and a resilient member (304R). The draft control mechanism (400) includes a sliding assembly (402), a first end cover (404), a housing (406), a second end cover (407), a resilient and shock absorber arrangement 408 and an adjustable assembly (410). A movement of position control lever assembly (302) induces a change in position of the implement. The locking arrangement (304) is adapted to lock position control lever assembly (302) at at least one of a plurality of positions. The draft control mechanism (400) is adapted to vary draft of implement coupled to an implement mounting structure (50) of vehicle.