Cnh Industrial America LLC

Cnh Industrial Italia S.p.a.

Duqiang Wu

Navneet Gulati

Aditya Singh

Michael Glennon

John C Endsley

Kevin Douglas McKee

Christopher Stovall

Patrick Thomas Dean

Uli Melchinger

Eric John Williams

Caleb Peterson

Gary R Kassen

William E Allen

Joshua D Zimmerman

Jason David Fox

Raul Espinosa

Michael Freisleben

Mitchell M Johnson

Patrick T Dean

A method for determining parallel lift feedforward control of a bucket of a work vehicle is provided. The method includes calculating a current stroke length of a bucket cylinder at a current moment based on a current bell crank plate angle and a current boom angle. The method includes predicting a future boom angle after a certain number of steps. The method further includes calculating a required bell crank plate angle from a learned cutting edge angle and the future boom angle. The method even further includes calculating a future stroke length of the bucket cylinder after the certain number of steps. The method yet further includes calculating an average speed command for bucket control based on the current stroke length and the future stroke length of the bucket cylinder. The method still further includes calculating a bucket cylinder control command based on the average speed command for bucket control.

System and method for determining parallel lift feedforward control for a wheel loader

A system for controlling implement orientation of a work vehicle includes a computing system configured to control an operation of a lift actuator of the vehicle such that an implement of the vehicle is moved from a first vertical position relative to a second vertical position. Furthermore, the computing system is configured to monitor the angle of the implement as the implement is moved from the first vertical position to the second vertical position. Additionally, the computing system is configured to determine an actual error value between the monitored angle and a selected angle of the implement. Moreover, the computing system is configured to determine a modified error value that is different than the actual error value and control an operation of a tilt actuator of the vehicle to adjust the angle of the implement relative to the driving surface based on the modified error value.

System and method for controlling implement orientation of a work vehicle based on a modified error value

A method for controlling the operation of a work vehicle includes initially controlling an operation of an implement actuator of the vehicle based on operator inputs received from an input device while a load sensing system of the vehicle is operable to adjust an output of an associated pump. The method also includes receiving an input providing an indication that an implement-based movement operation is to be performed and deactivating the load sensing system in response to the indication that the implement-based movement operation is to be performed. In addition, the method includes controlling the operation of the implement actuator based on further operator inputs received from the input device to perform the implement-based movement operation while the load sensing system is deactivated.

System and method for controlling the operation of a work vehicle to provide improved responsiveness when commanding implement movement

A method for estimating load weights for a work vehicle including a boom pivotably coupled to the chassis of the work vehicle at a boom joint and an implement pivotably coupled to the boom at an implement joint may include receiving an input indicative of a tilt force associated with a tilt cylinder configured to pivot the implement about the implement joint, and an input indicative of a lift force associated with a lift cylinder configured to pivot the boom about the boom joint. The method may further include determining a torque about the implement joint caused by the load based on the tilt force and determining a torque about the boom joint caused by the load based on the lift and tilt forces. Additionally, the method may include estimating a weight of the load based on the torques about the boom and implement joints.

System and method for estimating the weight of a load carried by an implement of a work vehicle

A method for automatically adjusting the position of an implement of a lift assembly of a work vehicle includes determining a tilt transition boom angle for the lift assembly, determining a closed-loop control signal associated with controlling movement of the implement based at least in part on the tilt transition boom angle, generating a valve command signal based at least in part on the closed-loop control signal, and controlling an operation of at least one valve associated with the implement based at least in part on the valve command signal to maintain the implement at a target implement angle as a boom of the lift assembly is being moved across a boom travel range.

Work vehicle with improved bi-directional self-leveling functionality and related systems and methods

A system for controlling the operation of a work vehicle implement during an implement shake operation may include an implement configured to pivotably coupled to a loader arm. A controller may be configured to monitor an angle of the implement relative to the arm during the implement shake operation. Furthermore, the controller may be configured to determine first and second differentials between monitored angles of the implement during first and second cycles of the implement shake operation, respectively, and a predetermined average implement angle. Additionally, the controller may be configured to determine an estimated differential between an anticipated angle of the implement during a third cycle of the implement shake operation and the predetermined angle based on the first and second differentials. Furthermore, the controller may be configured to adjust a duty cycle and/or an amplitude of the third cycle of the implement shake operation based on the estimated differential.

System and method for controlling work vehicle implements during implement shake operations

A movable machine including a chassis, a tool coupled to the chassis, an operator control carried by the chassis and a controller. The controller is communicatively coupled to the operator control. The controller being configured to send a force feedback and/or a vibration feedback to the operator control thereby conveying information to the operator. The information is not related to a load encountered by the tool.

Active force/vibration feedback control method and apparatus for a movable machine

In one aspect, a system for regulating the flow of fluid supplied to actuators of an agricultural implement may include a tool and a fluid-driven actuator configured to actuate the tool relative to a surface. The system may also include a pump configured to supply fluid to the fluid-driven actuator and a valve configured to control a flow of the fluid supplied to the fluid-driven actuator. Furthermore, the system may include a first sensor configured to detect a parameter indicative of a first pressure upstream of the valve and a second sensor configured to detect a parameter indicative of a second pressure downstream of the valve. Additionally, the system may include a controller communicatively coupled to the first and second sensors, with the controller configured to determine a pressure differential across the valve based on measurement signals received from the first and second sensors.

System and method for regulating the flow of fluid supplied to actuators of an agricultural implement

A hydraulic system including a supply line, an implement-based control valve, an override valve supported by the implement, and a bypass line. The control valve is fluidly coupled to the supply line and configured to regulate a flow of pressurized hydraulic fluid supplied through a downstream actuator line to a hydraulic actuator of the implement. The override valve is fluidly coupled to the actuator line downstream of the control valve and includes a supply position at which the flow of pressurized hydraulic fluid from the control valve passes through the override valve to the hydraulic actuator. The override valve is actuatable to at least one override position at which the flow of pressurized hydraulic fluid from the control valve is cut-off. The bypass line is fluidly coupled between the supply line and the override valve such that a portion of the pressurized hydraulic fluid flows to the hydraulic actuator.

Hydraulic system for an agricultural implement incorporating an implement-based override valve

A hydraulic system includes a supply line, at least one implement-based control valve, an implement-based pressure regulating valve, and a load sensing circuit. The implement-based control valve(s) is fluidly coupled to the supply line and configured to regulate a flow of the pressurized hydraulic fluid supplied through at least one downstream actuator line to at least one hydraulic actuator of the implement. The implement-based pressure regulating valve is fluidly coupled to the supply line upstream of the control valve(s) and configured to regulate a fluid pressure to be equal to or greater than a minimum fluid pressure. The load sensing circuit is fluidly coupled to the pressure regulating valve and provides a line or load pressure to the pressure regulating valve. The pressure regulating valve is configured to regulate the supply of the pressurized hydraulic fluid based on the line pressure.

Hydraulic system for an agricultural implement incorporating implement-based hydraulic load sensing

The present inventors have recognized that hydraulic cylinders for raising and lowering ground engaging tools of an implement can be synchronously controlled with respect to a prioritized primary set of tools, such as a section of tillage shanks for ripping compacted soil, which cylinder adjustment affects all other sections due to the arrangement of the primary set on the frame. A user can electronically command new ground engaging depths for the primary set and/or any secondary set of ground engaging tools. If the primary set is updated, the system can synchronously control the primary set and the other sections to adjust respective cylinders to achieve desired depths. However, if only a second set is updated, and not the primary set, the system can control only the second set to adjust its cylinder to the desired depth without affecting the primary set or any other second set.

Depth control for ground engaging tools of an implement

The present inventors have recognized that hydraulic cylinders for raising and lowering 'work units' of an agricultural implement used for engaging the ground can be improved by replacing one or more electronically controlled (electrohydraulic) proportional valves associated with a rod port of the cylinder with a simplified, flow control device, such as a pressure regulator, while still using the electronically controlled proportional valves associated with a base port of the cylinder. Due to the weight of the implement being associated with the rod side, which tends to force retraction of the rod when not opposed by the base side, complex proportional valves associated with the rod side can be replaced with such simplified devices providing a relatively low pressure sufficient to move hydraulic fluid with respect to the rod side.

Depth control system for raising and lowering a work unit of an implement

In one aspect, the present subject matter is directed to a system and method for controlling the operation of a work vehicle based on the multi-mode identification of operator inputs. Specifically, the movement of an input device of the work vehicle may be monitored relative to two or more movement ranges defined within or across the range of positions defining the input device's overall travel range. When it is detected that the operator has made a pattern of input device movements relative to one of the movement ranges, a new operating mode may be selected or activated that adjusts the transfer function used to control the movement of a component of the work vehicle based on the position of the input device.

System and method for controlling work vehicle operation based on multi-mode identification of operator inputs

A method for automatically controlling a position of one or more ground engaging tools of an agricultural implement is relative to a ground surface may include monitoring a position signal indicative of a position of a ground engaging tool of the implement. The position signal may have an associated system delay time. The method also may include estimating an arrival time when the position of the ground engaging tool will be within a predetermined threshold of a target position based on the monitored position signal and the system delay time associated with the monitored position signal. The method may include adjusting the position of the ground engaging tool and terminating the adjustment of the ground engaging tool at a termination time determined based on the arrival time.

Method and system for automatically controlling a position of a ground engaging tool of an agricultural implement relative to a ground surface

An implement control system includes an automatic control valve assembly configured to utilize fluid from a supply conduit to cause a cylinder to raise a ground engaging tool relative to a soil surface and to utilize the fluid flow from the supply conduit to cause the cylinder to lower the ground engaging tool relative to the soil surface while an automatic control mode is active. The implement control system also includes a controller configured to control the automatic control valve assembly based on a position of the ground engaging tool relative to the soil surface to control the position of the ground engaging tool relative to the soil surface while the automatic control mode is active. The controller is also configured to deactivate the automatic control mode in response to fluid pressure within a first manual control conduit exceeding a threshold pressure.

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Bolingbrook, IL, United States of America

Duqiang Wu