Deere + Company

Bryan Rausch

Sean Mairet

Lance Robert Sherlock

Todd F Velde

Scott Svend Hendron

Jeff Dobchuk

Travis Wiens

August D Hammer

Nicholas M Holzer

Joshua D Deboer

Stephen S Pearson

Natasha L Porter

Brent Rehkemper

Bryan D Sulzer

Alex R Vandegrift

George W Bozdech

Walter R Henson, II

Michael G Kean

Mark John Cherney

Giovanni Ananda Wuisan

Aaron R Kenkel

Joshua D Hoffman

John R Mahrenholz

Ronald James Huber

Christopher R Benson

Christopher J Meyer

Madeline T Oglesby

Jeffery Dobchuk

Walter Henson, Ii

Daniel A Griswold

Benjamin J Morrison

Amy C Carlson

Chris McDonald

Nathan H Laws

Justin Sticksel

Thomas J Waller

Brian Christopher Proeber

Benjamin D Pacholl

Megan E Marotz

A work machine and method for a work machine with an open center hydraulic system for controlling actuation of an implement includes an implement control valve, an electro-hydraulically controlled pump, a hydraulic circuit coupled to the implement actuator, and a pressure transducer positioned for measuring a pressure in the hydraulic circuit between the pump and the implement control valve. A calibration system for calibrating the pump includes a controller having a non-transitory computer readable medium having a program instruction for causing a processor to calibrate a first pump threshold for the pump in a pump-flow curve wherein the first pump threshold including a minimum pump control signal to actuate the pump; determine a hysteresis band in the pump-flow curve; and calibrate a second pump threshold for the pump in the pump-flow curve wherein the second pump threshold including a maximum pump control signal to actuate the pump below a relief setpoint.

Work machine and method for calibrating an electrohydraulic pump in an open center hydraulic system

A display system and method for a work machine having grade control is disclosed. The display system includes the frame of the work machine, a grading element, an actuator, a grade control system, a display, a sensor, and a controller. The actuator is coupled to the grading element to controllably drive movement of the movable grading element. The display is configured to display information related to movement of the grading element relative to a target zone. The sensor provides detection signals from which a distance between a position of the grading element and the target zone can be determined. The controller has a non-transitory computer readable medium with a program instruction to grade the surface. The program instructions when executed causes a processor the controller to do the following. The controller receives the detection signals and changes the scale of the display information based on the detection signals.

Method and system of controlling a display on a work machine having grade control

An auto-benching grade control system and method are provided for work machines such as excavators. Movements of at least one implement relative to a machine frame are actuated based on user inputs via a first user interface tool. Manual/automatic control modes are selected based on user inputs via a second user interface tool. Responsive to further user input via at least one of the first and second user interface tools, a target elevation is automatically specified based on a current elevation of at least one implement component corresponding to the further user input. During the automatic control mode, movement of at least the implement is controlled based at least in part on a specified target mainfall and a specified target cross-slope for at least a portion of the terrain to be worked, and the specified target elevation.

System and method of automated setting of elevation reference for continuous grade control

A system and method are provided for operating a work machine comprising a laser receiver and an implement for working a terrain. Responsive to movement of the laser receiver, a laser reference is received at a plurality of positions relative to a transmitting laser source, wherein the laser reference corresponds in slope and direction at a defined elevation offset with respect to a target surface profile of the terrain being worked. A plane of the laser reference is determined from data points corresponding to the plurality of positions at which the laser reference is received, and movement of at least the implement is controlled with respect to at least the determined plane of the laser reference and the defined elevation offset.

Laser reference tracking and target corrections for work machines

Antenna cover

Antenna cover with markers

A work vehicle comprising a frame supported by a ground engaging device. A boom assembly is coupled to the frame. An attachment coupler is coupled to the boom assembly. An electronic data processor is communicatively coupled to a boom actuator, an attachment coupler actuator, a boom sensor, an attachment coupler sensor, and an operator input device. A computer readable storage medium comprising machine readable instructions that, when executed by the processor, cause the processor to receive an operator input and for a tilt forward command, command the boom actuator to move the boom assembly to a frame contact position and then command the attachment coupler actuator to move the attachment coupler towards a lower position. For a tilt rearward command, command the attachment coupler actuator to move the attachment coupler towards an upper position and then command the boom actuator to move the boom assembly towards a raised position.

Apparatus and method for controlling an attachment coupler for a work vehicle

A work vehicle includes a frame; an implement; a linkage assembly mounting the implement to the frame; a linkage actuator coupled to the linkage assembly and the frame and configured to reposition the linkage assembly relative to the frame; a sensor configured to generate sensor position data associated with at least one of the linkage assembly and the linkage actuator representing a linkage position; an operator interface configured to receive operator input from an operator associated with the linkage actuator representing a velocity request; and an electronic control system having processing and memory architecture operatively coupled to the sensor, operator interface, and linkage actuator. The electronic control system is configured to generate an actuator command for the linkage actuator based on the velocity request and the linkage position that, upon execution, results in a constant velocity of the implement for the operator input regardless of the linkage position.

Work vehicle with constant velocity implement actuation

Touchpads are disclosed for machine control by an operator. A touchpad can include a surface, zones and command processor. The surface senses operator touch. The zones can be assigned zones. The touchpad can include dividers that separate the surface into the zones, and dividers can be assigned dividers. Each of the assigned zones and dividers can be selectively configured to control an assigned machine function. The command processor generates and sends commands to control the assigned machine functions based on operator touch of the assigned zones and dividers. The surface and dividers can have differing heights and/or textures. Illumination can distinguish assigned or selected zones and dividers. The dividers can be grouped to function as a joystick. Pressing different dividers can command machine functions in different directions. The touchpad controls can share power and signal connections, and can be mounted on a control stick.

Machine control using a touchpad

An open loop electrohydraulic bucket position control system for a work vehicle having a positionable bucket coupled to a movable boom. The bucket control system maintains a position of the bucket with respect to a frame of the vehicle as the movable boom is raised or lowered. A bucket command, determined by an operator of the vehicle, is modified based on a pre-determined relationship of the work vehicle's hardware and known and constant properties of a linkage design of the work machine. The control system includes a processor and one or more look-up tables that include data identifying implement velocities with respect to boom commands and implement velocities with respect to bucket commands. Bucket commands are modified based on a relationship between the commanded velocity of the boom and a level orientation of the bucket during the commanded heights of the boom. Modified bucket commands and boom commands adjust the position of a bucket hydraulic cylinder and a boom hydraulic cylinder.

Open loop electrohydraulic bucket position control method and system

A system for controllably moving a work implement of a work vehicle having a hydraulic fluid pump for providing fluid to the work implement, the system comprising: at least one operator command tool to produce an operator command signal to move the implement of the work vehicle; at least one sensor to sense a cylinder speed signal indicative of a speed of a hydraulic cylinder coupled to the implement; at least one valve to modulate the fluid flow of the hydraulic cylinder; and a controller.

Control of variable gravity driven hydraulic loads

An auxiliary flow adjustment system and method are disclosed for controlling an auxiliary hydraulic function on a machine in accordance with commands from an operator. The auxiliary flow adjustment system includes operator controls that control a hydraulic control valve. The control valve controls flow rate and flow direction to the auxiliary hydraulic function. When the auxiliary flow adjustment system is activated, the operator can use the operator controls to select a desired flow rate and flow direction for the auxiliary function and maintain the desired flow rate and direction without further use of the operator controls. When the flow adjustment system is activated while a non-zero flow rate is selected, the desired flow rate and direction can be set to the current settings. A resume control can retrieve and command the previously stored desired flow rate and direction. Controls can be used to increase and decrease the set flow rate.

Proportional auxiliary flow adjustment system and method

A work vehicle may comprise a chassis, a ground-engaging blade, a sensor assembly, and a controller. The ground-engaging blade may be movably connected to the chassis via a linkage configured to allow the blade to be tilted relative to the chassis. The sensor assembly may be connected to the work vehicle and configured to provide a tilt signal indicative of an angle of the blade in a roll direction and a roll signal indicative of a rotational velocity of the blade in the roll direction. The controller may be configured to determine a target tilt angle, receive the tilt signal, receive the roll signal, and send a command to tilt the blade toward the target tilt angle, the command based on the tilt signal, the roll signal, and the target tilt angle.

Blade tilt system and method for a work vehicle

A work vehicle may include a chassis, a ground-engaging blade, a sensor, and a controller. The ground-engaging blade may be movably connected to the chassis via a linkage configured to allow the blade to be raised or lowered relative to the chassis. The sensor may be connected to the chassis at a fixed relative position to the chassis and configured to provide a pitch signal indicative of a rotational velocity in a pitch direction. The controller may be configured to receive the pitch signal and send a command to raise or lower the blade, the command based on a first gain and the pitch signal when the pitch signal indicates a rotational velocity in a first direction and based on a second gain and the pitch signal when the pitch signal indicates a rotational velocity in a second direction.

Blade stabilization system and method for a work vehicle

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Durango, IA, United States of America

Bryan Rausch