Abstract: An agricultural soil cultivation unit having at least two rows of soil working tools that are fastened to a tool carrying frame that is pivotably supported about a horizontal frame pivot axis at a machine frame supported by a chassis on the ground and liftable by a lifting apparatus into a headland position and/or transport position. It is therefore proposed in accordance with an aspect of the invention to change the working depth setting of the soil working tool rows relative to one another online in working operation to hereby be able to react to changing soil conditions in working operation and to be able to mutually compensate resulting side forces of the soil working tools.

Abstract: An opening and closing motion control section controls an optional control valve so as to reduce opening degree of the optional control valve in a case where a first opening reduction condition is satisfied that a slewing operation detection section detects an operation amount equal to or more than a reference operation amount set in advance so that the reference operation amount is larger than a minimum operation amount of a slewing operation member for causing slewing motion of an upper slewing body and that an optional operation detection section detects operation received by an optional operation member.

Abstract: A method for increasing the load on driving rear wheels (KB, KP) of a tractor during soil cultivation with a farm implement (2), attached to a three-point linkage (1) of the tractor. A vertical position of the attached implement (2, 20) is adjusted relative to the tractor by a position of the arms (4) of a lifting device and by adjustment of the length of the upper link (13) of the three-point linkage (1) of the tractor. After adjusting the length of the upper link (13), the axial force acting/induced in the upper link (13) is determined and during travel of the tractor is continuously monitored and automatically maintained at the adjusted value. Also the adjusted vertical position of the implement (2) attached to the tractor is continuously monitored (2) and is 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.

Abstract: A system for monitoring frame levelness of an agricultural implement may include first and second sensors configured to detect first and second parameters indicative of forces exerted on first and second ground engaging tools of the implement by the ground, respectively. The system may also include a controller configured to monitor a parameter differential between the first and second parameters based on measurement signals received from the first and second sensors, with the monitored parameter differential being indicative of at least one of pitch or roll of a frame of the implement. The controller may be further configured initiate a control action associated with adjusting the pitch and/or the roll of the frame based on a magnitude of the monitored parameter differential to adjust an orientation of the frame relative to the ground.

Abstract: A computer system comprises a sensor device configured to attach to a rotating object. The sensor device has a gyroscopic sensor that is configured to measure rotational motion on one or more planes. The sensor device detects rotational movement and generates and transmits signals that represent the rotational movement detected to a mobile computing device. The mobile computing device receives the signals and assigns timestamp values to the signals. The mobile computing device also receives object parameter information that describes object attributes. The mobile computing device generates angular velocity datasets and object datasets that describe motion or positions of the object. The mobile computing device then generates sets of graphical representations from the object datasets and displays graphs from the sets of graphical representations, where each graph displayed is obtained from a distinct set of graphical representations.

Abstract: An agricultural implement includes the use of one or more electromechanical hydraulic cylinder assembly in place of hydraulic cylinders. The assemblies may take various forms for actuation, and can convert an electric power source to hydraulic power for use on or with the implement. A control system is also provided for connecting to a tractor to provide control information to the assemblies or to a central hydraulic supply via a ISOBUS that rebroadcasts input controls from a source, such as a tractor used in conjunction with the agricultural implement.

Abstract: A sensor to be mounted to an implement senses a region proximate a flow by ground engaging member of the implement. A electronics receives signals from the sensor and identifies accumulation on the grounding engaging member based upon the signals. The electronics outputs signals based upon the identified accumulation.

Abstract: A method and apparatus for controlling a height of an agricultural equipment component is provided. An average crop height is determined. In one embodiment, the agricultural equipment component is controlled to maintain a predetermined distance from a current top of crop level. If a current top of crop level cannot be determined, a virtual top of crop level is calculated using the average crop height value. The agricultural equipment component is controlled to maintain a predetermined distance from the virtual top of crop level. In another embodiment, the agricultural equipment component is controlled to maintain a predetermined distance from current ground level. If a current ground level cannot be determined, a virtual ground level is calculated using the average crop height value. The agricultural equipment component is controlled to maintain a predetermined distance from said virtual ground level. An ultrasonic sensor is also provided.

Abstract: A rear wheel drive assist for an articulated machine such as a wheel tractor scraper, the machine including a first frame section having a first longitudinal axis, a second frame section with a second longitudinal axis, the first and second frame sections being pivotally connected to an articulation hitch, and an articulation sensor configured to provide an articulation angle signal indicative of an articulation angle formed between the first and second longitudinal axes. The rear wheel drive assist includes a drive motor operatively connected to the rear wheel of the machine, and a controller configured to control operation of the rear wheel drive assist based upon the articulation angle signal.

Abstract: Heavy equipment includes a main body, a drivetrain, a work implement, and a control system. The drivetrain includes a first and second actuator providing speed and direction movement of the heavy equipment. The work implement includes a third and fourth actuator providing position and orientation of the work implement. The control system includes first and second main interfaces and first and second auxiliary interfaces, to allows an operator to simultaneously control the drivetrain and the work implement. The first main interface is operated by a first hand of the operator, and the control system operates the third actuator responsive to a signal from the first main interface. The first auxiliary interface is integrated with the first main interface, and operates simultaneously with the first main interface by a finger of the first hand. The control system operates the first actuator responsive to a signal from the first auxiliary interface.

Abstract: A control system for a mobile excavation machine is disclosed. The control system may include a ground engaging work tool, a sensor, and a controller. The sensor may be configured to sense a parameter indicative of a current travel speed of the mobile excavation machine and generate a speed signal in response thereto. The controller may be in communication with the ground engaging work tool and the sensor, and configured to receive the signal. The controller may also be configured to determine a cutting depth of the ground engaging work tool into a material and calculate a current productivity value associated with removal of the material based on the speed signal and the determined cutting depth. The controller may be further configured to control the ground engaging work tool to vary the amount of material currently being removed in response to the current productivity value.

Abstract: A method of operating a motion-control system is provided. The motion-control system may include an actuator and a moveable component driven by the actuator. The method may include providing input that indicates a target value of a parameter of the motion of at least one of the actuator and the moveable component with an operator-input device that is mechanically decoupled from the moveable component. The method may also include controlling the operation of the actuator at least in part with a control signal, including generating the control signal at least in part by determining a control gain based at least in part on a control error between the target value of the parameter and an actual value of the parameter. Generating the control signal may also include multiplying the control gain by the control error or a value derived from the control error.

Abstract: A dynamic tactical feedback system for a turf maintenance vehicle includes an input device that detects a steering angle and/or a ground speed of the turf maintenance vehicle. The input device transmits an input signal correlative to the steering angle and/or ground speed of the turf maintenance vehicle. The system also includes an output device that affects a steering resistance, a turning ratio, a speed limit, the ground speed and/or a turning angle limit of the turf maintenance vehicle. The system additionally includes a controller that receives the input signal and outputs a control signal to the output device based on the input signal so as to change the steering resistance, the turning ratio, the speed limit, the ground speed and/or the turning angle limit of the turf maintenance vehicle based on the input signal. A method of controlling the turf maintenance vehicle is also disclosed.

Abstract: The application discloses an automated control module, which is configured to receive an input signal from a sensor and generate a universal control signal that can be processed by different machine controllers having different control configurations. In one embodiment the universal control signal is transmitted to a machine controller on the power machine through a connection assembly including a connector plug and socket. In another embodiment, the universal control signal is transmitted through a wireless interface. The machine controller processes the universal control signal and outputs a device control signal to operate different devices “on board” the power machine.

Abstract: An industrial truck with a load supporting device, a sending and receiving unit, the sending and receiving range of which is directed towards a region of the load supporting device and towards a region in front of the load supporting device, and a control unit, which activates the sending and receiving unit for the reception of data from external senders, a sensor being provided which detects a load on the load supporting device and triggers an activation of the sending and receiving unit via the control unit when the sensor has detected a load, characterized in that the sensor is integrated into a housing for the sending and receiving unit.

Abstract: A method is described of operating a working machine which includes a body, a ground engaging structure, and a working arm carrying a working implement, and an operator control for operating hydraulic actuators for effecting operating functions of the machine, the operator control mounting an additional control which is controllable to operate at least one selected actuator for effecting a selected operating function, the additional control providing inputs to a control device which responds proportionally to operate the selected actuator, the method including controlling the additional control to operate the selected actuator, and with the additional control being controlled to provide an input to the control device to achieve a desired operation of the actuator, activating a memory mode whereby the control device memorises the input and continues to operate the selected actuator in accordance with the memorised input.

Abstract: A mechanical hitch control system for a vehicle includes a draft force sensing member, a mechanical hitch control unit, a hitch valve actuator, and a cable transmitting a draft force signal to the hitch control unit. A draft cam is coupled to the draft force sensing and setting members. A position cam is coupled to the position setting member and to a hitch position sensing member. A draft pickup cam is coupled to the draft cam and pivotally mounted on the hitch position setting member. At least one of the cams is operatively engagable with the hitch valve actuator. The cams are enclosed by housing with an opening covered by a removable side plate. The cams and levers are coupled to input members which are inserted through the side plate. The assembled cams, levers and input members are then installed into the housing through the opening.

Abstract: A work vehicle has a transmission controller that is configured to determine the direction of travel of the vehicle based upon the state of the transmission. The transmission controller is also configured to communicate this information to navigation system to assist the navigation system in determining the vehicle's movement. The transmission controller determines the direction of travel based upon looking at the clutch state and the vehicle speed.

Abstract: A draft load control system for an agricultural tractor towing a trailed, ground-engaging implement that monitors implement height using sensors located on the tractor or sensors coupled to an on-board control communications system and adjusts the implement position in relation to the ground based on draft load, implement height, and tractor wheel-slip to maintain a more accurate, consistent draft load on the tractor while maintaining the implement engaged with the ground and preventing the tractor-implement ground speed from being reduced to zero.

Abstract: A draft load control system for an agricultural tractor coupled to a semi-trailed, ground-engaging implement that monitors implement height using sensors located on the tractor or sensors coupled to an on-board control communications system and adjusts the implement position in relation to the ground through coordinated action of the three-point hitch and the on-implement position actuator based on draft load, implement height, and tractor wheel-slip to maintain a more accurate, consistent draft load on the tractor while maintaining the implement engaged with the ground and preventing the tractor-implement ground speed from being reduced to zero.

Abstract: A work vehicle comprising a motor, a drive unit for driving a ground engaging portion, a torque converter for variably transferring power from the motor to the ground engaging portion, a lubrication circuit for providing lubrication fluid to the torque converter, and a control valve located between the torque converter and the lubrication circuit. The work vehicle further having a linkage for performing a work function, an actuator to controllably move the linkage, a sensor coupled to the actuator to sense a force opposing the actuator, and a controller in communication with the sensor and the control valve. The controller is adapted to command a crowd reduction in response to the sensed force opposing the linkage, whereby the pressure of the lubrication fluid provided to the torque converter is reduced.

Abstract: A system for reliably enabling an implement controller for a work vehicle having a swivel seat with at least two angular positions. The system includes an implement controller for controlling a work implement, seat position detector for determining the positions of the swivel seat, an ignition switch and an implement controller toggle switch. The system is capable of enabling the implement controller under ideal enablement conditions and non-ideal enablement conditions. Ideal enablement conditions exist when the implement controller toggle switch is toggled to an implement controller enabling state while the ignition switch is on and the seat is properly positioned. Non-ideal enablement conditions exit when the implement controller toggle switch is put in an implement controller enabling state in the absence of ideal enablement conditions.

Abstract: A shock resistant device. A printed circuit board comprising electronics and a frequency reference is rigidly mounted to a central support member. The electronics can be mounted to both surfaces of the printed circuit board. The central support member is mounted to an enclosure via wire rope isolators. The central support member is designed to maximize rigidity at minimum mass. The central support member can comprise a thin wall metal mesh or honeycomb. At least a portion of the central support member directly contacts the printed circuit board beneath the frequency reference.

Abstract: A process of setting the length of an upper steering arm of an attaching device of a tractor. The attaching device includes the upper steering arm with a power drive provided for length setting purposes; a length sensor to determine the actual length of the upper steering arm; two lower steering arms with a lifting mechanism to lift and lower the lower steering arm; a lift sensor to determine the actual position of lift of the steering unit; as well as a control unit. The nominal lengths of the upper steering arm (7), to be determined as a function of the directions of movement of the lifting mechanism, are stored in the control unit. Determining the actual length of the upper steering arm (7), the actual position of lift of the lifting mechanism and the direction of movement of the lifting mechanism.

Abstract: The present invention provides a method and apparatus for automatically limiting the ground speed of a work machine. The work machine is adapted to move about the ground of a work site. An electronic site map having at least one speed restriction is maintained at a site office. The work machine monitors its position using an onboard GPS system and compares its actual speed and position to the site map. If the work machine exceeds the speed restriction, the work machine receives a signal and reduces speed.

Abstract: A system for measuring the amount of crop material located on a field to be harvested uses a scanning laser device. The scanning laser device has a transmitter for emitting electromagnetic radiation, a receiver for receiving reflected radiation from the crop material and providing resolution in terms of location and/or angle from which the reflected radiation was received. The receiver also generates an intensity signal indicating the intensity of the reflected electromagnetic radiation. A controller is in communication with the scanning laser device and determines the amount of the crop material located on the field on the basis of the crop material location signals and the intensity signals received from the receiver.

Abstract: A work vehicle such as an agricultural tractor includes means for the operator to select between manual or automatic engine speed control and to select among multiple automatic modes each having a different amount by which the engine speed is reduced when the load is reduced and the transmission is up-shifted to maintain the vehicle ground speed. This enables the operator to match the degree of engine speed reduction to the particular task at hand for improved performance and productivity. Preferably, the transmission is an infinitely variable transmission whereby the engine speed and the transmission can both be varied infinitely.

Abstract: An apparatus and method for a pitch state estimator is provided. The pitch state estimator generates a pitch state signal for establishing the orientation used in the control of a ground-traversing vehicle. The vehicle has a support for supporting a load which is preferably a human passenger. In one embodiment, the pitch state estimator includes a pitch sensor connected to the vehicle producing a pitch signal representing an estimate of a pitch angle of the vehicle. The pitch angle is associated with a coordinate system referenced to gravity. The pitch state estimator also includes at least one inertial reference sensor connected to the vehicle producing an inertial orientation signal with respect to the vehicle. Further included is a state estimator module for receiving the pitch signal and the inertial orientation signal and calculating a pitch state signal from the inertial orientation signal and the pitch signal sensor.

Abstract: A tractor includes various actuators or functions, such as a powershift transmission, a hitch and hitch control system, a PTO, a plurality of selective control valves, etc., all controlled by one or more control units in response to sensed parameters and operator manipulated control devices, such as switches, knobs and levers. A function management system includes a programmed control unit which has a learn/save mode which is operable while the vehicle is moving. During the learn/save mode the operator performs a sequence of manual manipulations of the operator control devices, and the control unit records and then stores information pertaining to the sequence of operations, together with information pertaining to the distances traveled by the tractor between operations.

Abstract: A method of selecting pneumatic devices that satisfy specified load, speed and strength conditions to construct a pneumatic system. Data concerning pneumatic actuators, solenoid-controlled selector valves, drive controllers, pipes, pipe joints and exhaust treatment devices is stored in a pneumatic actuator database, a solenoid-controlled selector valve database, a drive controller database, a pipe database, a pipe joint database and an exhaust treatment device database, respectively, for each item number, and conditions required for pneumatic devices constituting a system are calculated. Then, pneumatic devices conforming to the calculated conditions are selected from the respective databases. At the first step, a pneumatic actuator satisfying a load condition, a strength condition and a speed condition is selected from the pneumatic actuator database on the basis of a calculation according to a basic equation.

Abstract: A lift vehicle and a method for initializing a controller for controlling a lifting mechanism of lift vehicle. The controller controls the maximum forward tilt angle of a mast by controlling a solenoid of a hydraulic circuit. The controller employs a stored map or equation that defines a relationship between the forward tilt limit and another parameter. When the mast is tilted at two degrees, a CPU reads the detection value of a tilt angle sensor and sets it as a reference value. The reference value is used to calibrate the controller. The same function information can be used for many types of lift vehicles by selecting the appropriate control ranges for each vehicle.

Abstract: The present invention provides a method and apparatus for controlling a work implement in order to enable an earth moving machine to move to a service area after a failure within an implement control system occurs. The method includes the steps of detecting the failure of the implement control system, enabling a limp home mode in response to the failure, and controlling the implement into a limp home position through operator interaction using a display and either an associated keypad or a touch screen.

Abstract: A system is described for setting a self-propelled harvesting machine having several machine components with respectively adjustable parameters wherein setting of these parameters takes into account external harvesting conditions. Means are provided for manually inputting and/or automatically detecting the external harvesting conditions for the particular harvesting application. Furthermore at least one storage means is provided for storing the machine parameters for the respective harvesting application and for different external harvesting conditions. Also, if the occasion arises, the storage means may take into account at least one target standard. The stored machine parameters for setting the harvesting machine can be called up from the storage means after the system knows the respective external harvesting conditions and, if necessary, the respective target standard.

Abstract: A dozing system for a bulldozer capable of providing high operational efficiency in dozing operation and a smooth excavation face. If it is determined when operation is performed in an automatic digging mode that the load exerted on the blade is stable, a target position for the cutting edge relative to the ground is corrected to the actual position of the cutting edge at that time. According to the ratio of the amount of excavated soil loaded on the front surface of the blade to the loading capacity of the blade front surface and/or the stability of the load exerted on the blade, a switching is performed between a weight characteristic for the operation amount of the load control and a weight characteristic for the operation amount of the smoothing control.

Abstract: An apparatus and method for controlling the clamping forces on an object being held between a bucket and a thumb of a work machine is disclosed. The apparatus and method controls the head and rod end pressures of the bucket and thumb hydraulic cylinders to substantially maintain a desired clamping pressure on the gripped object, thereby providing at a touch of a switch, a work machine that can be controlled as the thumb and forefinger combination of the human hand which gives a "wristlike" action to the bucket thumb combination.

Abstract: An apparatus and method is disclosed for preventing the performance of an automatic sequence of operations of a work vehicle. The apparatus is a system that includes a databus, a plurality of input devices, a primary control unit coupled to the plurality of input devices and to the databus, a plurality of output devices and a plurality of secondary control units coupled to the databus, each of the secondary control units also being coupled to at least one of the output devices. The primary control unit directs the performance of the automatic sequence of operations by generating commands to be provided onto the databus. Each of the secondary control units directs an output function by the at least one output device coupled thereto in response to the commands on the databus.

Abstract: An electronic control device for management of the steering in earth-moving machines, essentially comprises a programmable logic electronic control unit (1) which is arranged as an interface between a pushbutton console (2) for setting a steering mode and an input diagnostics system (3) associated with the functions of the gearcase and the engine and with positioning of the wheels of the machine. The setting of a steering mode on the pushbutton console (2) is made possible by simultaneous selection of at least two switches (50). The input diagnostics system (3) of the electronic control unit (1) comprises a front wheel alignment sensor (28) and a rear wheel alignment sensor (29) which are respectively positioned in the region of the front and rear axles of the earth-moving machine and are designed to detect respectively the alignment position of the front and rear wheels with respect to the longitudinal axis of the machine itself.

Abstract: A blade control system is configured to control the spatial orientation of an earthmoving blade mounted on a frame of an earthmoving machine for working a surface of earth to a desired shape. The blade slope angle required to maintain a selected cross-slope angle is calculated and the blade slope is then controlled so that the sensed blade slope angle is substantially equal to the calculated blade slope angle. The method and apparatus of the present invention is capable of maintaining the desired cross-slope even when the motorgrader is steered through a turn. The control system includes an input circuit, a sensor system and a processor. The input circuit is arranged to generate an output signal representative of the desired shape of the surface of earth to be worked. The sensor system includes a first sensor coupled to the frame of the earthmoving machine to generate a first signal indicative of a longitudinal slope angle of the frame with respect to horizontal.

Abstract: An apparatus and method is disclosed for wireless remote control of an output element coupled to a work vehicle. The output element performs work external to the vehicle and is actuated by an actuator controlled by an output controller in response to at least a remote control signal. The apparatus includes a wireless remote transmitter movable with respect to the vehicle and a wireless receiver supported by the vehicle. The transmitter has an actuatable input device for generating a command signal, a transmitter antenna, and a transmitter control circuit which receives the command signal from the input device, generates the remote control signal in response to the command signal, and applies the remote control signal to the transmitter antenna for wireless transmission to the work vehicle.

Abstract: An irrigation control system including an irrigation controller, a portable data shuttle, and a personal computer. The user creates a watering program comprising watering schedules by using a graphical user-friendly interface of the personal computer. The watering program is then downloaded into the portable data shuttle. The portable data shuttle is coupled to an irrigation controller and a first watering schedule is downloaded from the portable data shuttle into the irrigation controller in a matter of seconds. At a later time, the data shuttle automatically downloads a second watering schedule replacing the first schedule, thereby updating the irrigation programming. For example, a new watering schedule may be automatically downloaded at preselected intervals to accommodate the changing seasons. The portable data shuttle includes voltage regulation circuits so that it can receive power from either the personal computer or the irrigation controller.

Abstract: A farming system which identifies the boundaries of agricultural fields and performs functions based upon whether a vehicle is located within a particular field is disclosed. The system includes a location signal generation circuit which receives positioning signals and generates location signals representative of the location of the vehicle. The system further includes a memory circuit which stores geo-referenced digital maps of the fields and may include boundary data or application maps for each field. The system further includes a control circuit which compares the location signals to the data stored in the memory circuit to determine when the vehicle is located in a particular field. In one embodiment, the control circuit selects a variable-rate application map for the particular field and generates variable-rate control signals from the map data which are applied to a variable-rate applicator.

Abstract: A universal modular control system for controlling a mobile material distribution apparatus is disclosed. The universal modular control system is adaptable for use with any of a plurality of distribution apparatus. It includes a control module for controlling the distribution apparatus and a user console for communicating with a user. The control module and user console are coupled via a data link.

Abstract: A system for reducing oscillations of an implement carried by a vehicle in a lifted position during travel. The implement is coupled to an implement positioning system including an actuator for raising and lowering the implement in response to a control signal. The system includes at least one load sensor for sensing implement load, a position sensor for sensing implement position, and a control circuit configured to generate a control signal to the actuator in a first manner based at least upon implement position and in a second manner based at least upon implement load. The control circuit transitions from the first manner of operation to the second manner of operation upon detecting oscillations of the implement beyond a predetermined magnitude.

Abstract: An apparatus (10) for coupling a cutting tool (12) to a vehicle (14) such as a tractor that permits the cutting tool (12) to pivot to a released position when it contacts an obstruction (38) and that returns the cutting tool (12) to its cutting position at a controlled speed after the cutting tool has cleared the obstruction is disclosed. The coupling apparatus (10) includes a frame (18) pivotally coupled to the vehicle (14) and fixedly coupled with the cutting tool(12) and a rotary actuator (18) for pivoting the frame (16) and the cutting tool (12) between their cutting and released positions at a controlled speed.

Abstract: A control unit for controlling load on a bulldozer in the case of manual intervention, comprising: an actual tractive force detector for detecting the actual tractive force of a vehicle body; a target tractive force setting device for setting a target tractive force for an automatic blade control mode in dozing operation according to the actual tractive force detected by the actual tractive force detector; and a blade controller for controlling a blade to be lifted or lowered such that, if there is a difference between the target tractive force set by the target tractive force setting device when switching from the automatic blade control mode to a manual operation mode takes place in dozing operation and the actual tractive force detected by the actual tractive force detector when return from the manual operation mode to the automatic blade control mode takes place, the actual tractive force gradually comes closer to the target tractive force set when switching to the manual operation mode takes place.

Abstract: An implement control system includes desired draft force setting apparatus and draft force sensing apparatus providing a draft force signal. It also includes engine speed sensing apparatus arranged to provide an engine speed signal of the same form as the draft force signal. The draft force signal and engine speed signal are averaged and compared with the set desired draft force to produce an error signal which is used to control the movement of the implement. The system is particularly suitable for the control of engine driven implements such as stone-breakers and rotivators where it prevents the engine stalling under heavy load, it is, however, suitable for use with fully-mounted, semi-mounted and trailed implements.

Abstract: A control system for the hitch of a tractor includes a motor for moving the mechanical control linkages connected to a hitch control valve, the motor being in the form of an electric motor. The motor is controlled by way of an electrical circuit which includes a main switch, one or more secondary switches which are disposed outside a driving cabin, and a safety switch. The safety switch permits flow of current to the motor only when positional regulation is selected by a hitch control mode selector lever.

Abstract: An electro-hydraulic arrangement regulating the lifting mechanism actuatable by a hydraulic motor, on an agricultural working vehicle having a driven wheel, comprises a plurality of sensors including a position sensor forming an actual value position signal, a force sensor forming an actual value force sensor, and an additional sensor forming an actual value slippage signal dependent on slippage of the driven wheel, a nominal value transmitter, a first summation point connected with the additional sensor and with the force sensor so as to obtain the slippage-dependent signal and the actual value force signal therefrom and to produce an output signal, a mixing device having a first input connected with the first summation point and for receiving the output signal and a second input connected with the position sensor for receiving the actual value position signal and producing an output signal, and a second summation point connected with the mixing device for receiving the output signal of the mixing device and

Abstract: A remote actuating mechanism, in particular for actuating a control lever of a three-point implement hitch, has a transmission unit with a slide which is movable longitudinally by means of a swingable driver. The driver can be held in an inoperative position and has a spring-loaded driving pin by means of which a positive connection can be obtained between the driver and the transmission unit in any position of the slide. The positive connection is possible, however, only in a single spatial relationship between the driver and the slide. In the inoperative position, the driver is separated from the slide and a lock is provided to prevent unintentional actuation.

Abstract: A hitch control system generates a rockshaft valve control signal as a function of sensed draft force, rockshaft position and operator input. Periodically, an auxiliary or disturbance signal of certain amplitude, frequency and duration is superimposed on the valve command signal. A calculated soil/implement gain is derived from components of the valve command signal and the measured draft force which have certain phase relationships with the disturbance signal. An electronic gain is modified so that the overall soil/implement gain remains substantially constant.