Patents by Inventor Aaron R. Kenkel
Aaron R. Kenkel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230407599Abstract: 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.Type: ApplicationFiled: September 1, 2023Publication date: December 21, 2023Inventors: Justin Sticksel, Aaron R. Kenkel, Jeffery Dobchuk, Bryan J. Rausch, Madeline T. Oglesby
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Patent number: 11808011Abstract: A work machine having a cab coupled to a frame, a steering system coupled to the frame, a controller configured to selectively articulate the steering system, a joystick assembly positioned in the cab and in communication with the controller, a steering wheel assembly positioned in the cab and configured to selectively articulate the steering system, and a steering wheel sensor coupled to the steering wheel assembly and in communication with the controller to identify movement of the steering wheel assembly. Wherein, the controller does not articulate the steering system responsive to movement of the joystick assembly when the steering wheel sensor identifies movement of the steering wheel.Type: GrantFiled: January 8, 2021Date of Patent: November 7, 2023Assignee: DEERE & COMPANYInventors: David J. Myers, Brian K. Kellogg, Aaron R. Kenkel, Adam J. Sobkowiak, Michael McCabe, Bryan J. Huttenlocher, Jason L. Mueller
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Publication number: 20230265870Abstract: 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 threshold for the pump in a pump-flow curve wherein the first threshold including a minimum current command to actuate the pump; determine a hysteresis band in the pump-flow curve; and calibrate a second threshold for the pump in the pump-flow curve wherein the second threshold including a maximum current command to actuate the pump below a relief setpoint.Type: ApplicationFiled: February 22, 2022Publication date: August 24, 2023Inventors: Justin Sticksel, Aaron R. Kenkel, Jeff Dobchuk, Bryan J. Rausch, Madeline T. Oglesby
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Patent number: 11702051Abstract: Vehicles and methods of operating vehicles are disclosed herein. A vehicle includes a main frame, a work implement, and a control system. The work implement is supported by the main frame and configured to carry a payload in use of the vehicle. The control system is supported by the main frame and configured to control operation of the vehicle. The control system includes a payload measurement system configured to provide payload input indicative of a variable payload carried by the work implement in use of the vehicle and a controller coupled to the payload measurement system.Type: GrantFiled: April 5, 2021Date of Patent: July 18, 2023Assignee: DEERE & COMPANYInventors: David Myers, Michael R. Gratton, Michael G. Kean, Todd F. Velde, Dustin T. Staade, Matthew Sbai, Ryan Detweiler, Grant R. Henn, Mary B. Wigginton, Aaron R. Kenkel
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Patent number: 11681320Abstract: In embodiments, a work vehicle magnetorheological fluid (MRF) joystick system includes a joystick device, an MRF joystick resistance mechanism, and a controller architecture. The joystick device includes, in turn, a base housing, a joystick movably mounted to the base housing, and a joystick bias mechanism coupled to the joystick and exerting a centering force urging the joystick to return to the centered position when moved therefrom. The controller architecture is operable in a modified centering mode in which the controller architecture: (i) determines when the joystick begins return toward the centered position due to the centering force applied by the joystick bias mechanism; and (ii) when so determining, commands the MRF joystick resistance mechanism to modify a rate at which the joystick returns to the centered position by varying the MRF resistance force applied to the joystick.Type: GrantFiled: May 1, 2020Date of Patent: June 20, 2023Assignee: DEERE & COMPANYInventors: Aaron R. Kenkel, Alex R. Vandegrift
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Patent number: 11634885Abstract: In embodiments, a work vehicle magnetorheological fluid (MRF) joystick system includes a joystick device, an MRF joystick resistance mechanism, and a controller architecture. The joystick device includes, in turn, a base housing, a joystick movably mounted to the base housing, and a joystick position sensor configured to monitor movement of the joystick relative to the base housing. The MRF joystick resistance mechanism is controllable to vary a first joystick stiffness resisting movement of the joystick relative to the base housing in at least one degree of freedom. The controller architecture is configured to: (i) detect when unintended joystick motion conditions occur during operation of the work vehicle; and (ii) when detecting unintended joystick motion conditions, command the MRF joystick resistance mechanism to increase the first joystick stiffness in a manner reducing susceptibility of the joystick device to unintended joystick motions.Type: GrantFiled: May 1, 2020Date of Patent: April 25, 2023Assignee: DEERE & COMPANYInventors: Todd F. Velde, Alex R. Vandegrift, Craig Christofferson, Christopher J. Meyer, Aaron R. Kenkel, Mark D. Anderson, Lance R. Sherlock, Kenneth Franck
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Patent number: 11536009Abstract: A monitoring system for a work vehicle having a lift system to which an implement is attachable via a connection assembly includes a weight detection subsystem operable with the lift system and configured to transfer signals representative of a weight supported by the lift system. The monitoring system also includes a position detection subsystem operable with the connection assembly and configured to transfer signals representative of a state of the connection assembly. A controller is in operable communication with the weight detection subsystem and the position detection subsystem and is configured to receive signals from the weight detection subsystem and from the position detection subsystem, determine a condition of the connection assembly based on the signals received, and output a signal based at least in part on the determined condition.Type: GrantFiled: July 26, 2019Date of Patent: December 27, 2022Assignee: DEERE & COMPANYInventors: Doug M. Lehmann, Aaron R. Kenkel
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Patent number: 11530525Abstract: A work machine includes a chassis, a boom coupled to the chassis, and a work implement coupled to the boom and movable relative to the chassis. In system may further include dynamic payload weighing system configured to measure the payload weight on the work implement. The system may also include an electrohydraulic system controller in communication with the dynamic payload weighing system and an electrohydraulic control valve electrically coupled to the electrohydraulic system controller and moveable to a plurality of weight-specific valve positions based on the measured payload weight on the implement.Type: GrantFiled: October 31, 2019Date of Patent: December 20, 2022Assignee: DEERE & COMPANYInventors: Michael R. Gratton, David Myers, Aaron R. Kenkel, Michael G. Kean, Mary B. Wigginton, Grant R. Henn, Todd F. Velde, Joseph R. Keene, Dustin T. Staade, Kevin Campbell, Thomas L. Kennedy, Ryan Detweiler, Matthew Sbai
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Patent number: 11499292Abstract: In embodiments, a work vehicle magnetorheological fluid (MRF) joystick system includes a joystick device, an MRF joystick resistance mechanism, and a controller architecture. The joystick device includes, in turn, a base housing, a joystick, and a joystick position sensor. The MRF joystick resistance mechanism is controllable to selectively resist movement of the joystick relative to the base housing. The controller architecture is configured to: (i) when detecting operator rotation of the joystick in an operator input direction, determine whether continued joystick rotation in the operator input direction will misposition the work vehicle in a manner increasing at least one of work vehicle instability and a likelihood of work vehicle collision; and (ii) when determining that continued joystick rotation will misposition the work vehicle, command the MRF joystick resistance mechanism to generate an MRF resistance force deterring continued joystick rotation in the operator input direction.Type: GrantFiled: May 1, 2020Date of Patent: November 15, 2022Assignee: DEERE & COMPANYInventors: Todd F. Velde, Madeline T. Oglesby, Lance R. Sherlock, Benjamin P. Koestler, Mark D. Anderson, Aaron R. Kenkel, Doug M. Lehmann, Craig Christofferson, Kenneth Franck, Christopher J. Meyer
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Patent number: 11421399Abstract: A load sensitive ride system and method is disclosed for a vehicle with an implement movably attached by a boom cylinder. The system includes a payload weight measuring system that measures payload weight and generates a signal indicative of the payload weight, a ride control circuit that adjusts hydraulic flow to and from the boom cylinder; and a controller that receives the signal indicative of the payload weight, and sends compliance commands to adjust ride control compliance based on the signal indicative of the payload weight. The system can include a tire inflation system that adjusts tire pressure. The controller can send inflation commands to adjust tire pressure based on the signal indicative of the payload weight. The compliance commands can depend on the components and compliance adjustment methods of the ride control circuit.Type: GrantFiled: October 31, 2019Date of Patent: August 23, 2022Assignee: DEERE & COMPANYInventors: Aaron R. Kenkel, Michael G. Kean, Mary B. Wigginton, Michael R. Gratton, Grant R. Henn, Todd F. Velde, Joseph R. Keene, Kevin W. Campbell, Dustin T. Staade
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Patent number: 11293168Abstract: A control system for a material handling vehicle has a boom arm connected to a vehicle frame for rotation about the vehicle frame. An actuator is connected to the vehicle frame and the boom arm to cause the boom arm to rotate about the vehicle frame, and an attachment is connected to the boom arm for rotation with respect to the boom arm. The control system includes a controller that is configured to calculate a pre-determined acceleration limit of the attachment, and a sensor that senses acceleration of the attachment and communicate the sensed acceleration to the controller. The controller is configured to compare the pre-determined acceleration limit of the attachment to the sensed acceleration of the attachment and is configured to adjust a control valve to limit flow to the actuator in response to the sensed acceleration of the attachment being above the pre-determined acceleration upper limit.Type: GrantFiled: February 28, 2018Date of Patent: April 5, 2022Assignee: DEERE & COMPANYInventors: Aaron R. Kenkel, Grant R. Henn, Doug M. Lehmann
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Patent number: 11249508Abstract: In embodiments, a work vehicle magnetorheological fluid (MRF) joystick system includes a joystick device, an MRF joystick resistance mechanism, and a controller architecture. The joystick device includes, in turn, a base housing, a joystick movably mounted to the base housing, and a joystick bias mechanism coupled to the joystick and exerting a centering force urging the joystick to return to the centered position when moved therefrom. The controller architecture is operable in a modified centering mode in which the controller architecture: (i) determines when the joystick begins return toward the centered position due to the centering force applied by the joystick bias mechanism; and (ii) when so determining, commands the MRF joystick resistance mechanism to modify a rate at which the joystick returns to the centered position by varying the MRF resistance force applied to the joystick.Type: GrantFiled: May 1, 2020Date of Patent: February 15, 2022Assignee: DEERE & COMPANYInventors: Aaron R. Kenkel, Alex R. Vandegrift
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Publication number: 20210341960Abstract: In embodiments, a work vehicle magnetorheological fluid (MRF) joystick system includes a joystick device, an MRF joystick resistance mechanism, and a controller architecture. The joystick device includes, in turn, a base housing, a joystick movably mounted to the base housing, and a joystick bias mechanism coupled to the joystick and exerting a centering force urging the joystick to return to the centered position when moved therefrom. The controller architecture is operable in a modified centering mode in which the controller architecture: (i) determines when the joystick begins return toward the centered position due to the centering force applied by the joystick bias mechanism; and (ii) when so determining, commands the MRF joystick resistance mechanism to modify a rate at which the joystick returns to the centered position by varying the MRF resistance force applied to the joystick.Type: ApplicationFiled: May 1, 2020Publication date: November 4, 2021Inventors: Aaron R. Kenkel, Alex R. Vandegrift
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Publication number: 20210340723Abstract: In embodiments, a work vehicle magnetorheological fluid (MRF) joystick system includes a joystick device, an MRF joystick resistance mechanism, and a controller architecture. The joystick device includes, in turn, a base housing, a joystick, and a joystick position sensor. The MRF joystick resistance mechanism is controllable to selectively resist movement of the joystick relative to the base housing. The controller architecture is configured to: (i) when detecting operator rotation of the joystick in an operator input direction, determine whether continued joystick rotation in the operator input direction will misposition the work vehicle in a manner increasing at least one of work vehicle instability and a likelihood of work vehicle collision; and (ii) when determining that continued joystick rotation will misposition the work vehicle, command the MRF joystick resistance mechanism to generate an MRF resistance force deterring continued joystick rotation in the operator input direction.Type: ApplicationFiled: May 1, 2020Publication date: November 4, 2021Inventors: Todd F. Velde, Madeline T. Oglesby, Lance R. Sherlock, Benjamin P. Koestler, Mark D. Anderson, Aaron R. Kenkel, Doug M. Lehmann, Craig Christofferson, Kenneth Franck, Christopher J. Meyer
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Publication number: 20210341032Abstract: In embodiments, a work vehicle magnetorheological fluid (MRF) joystick system includes a joystick device, an MRF joystick resistance mechanism, and a controller architecture. The joystick device includes, in turn, a base housing, a joystick movably mounted to the base housing, and a joystick position sensor configured to monitor movement of the joystick relative to the base housing. The MRF joystick resistance mechanism is controllable to vary a first joystick stiffness resisting movement of the joystick relative to the base housing in at least one degree of freedom. The controller architecture is configured to: (i) detect when unintended joystick motion conditions occur during operation of the work vehicle; and (ii) when detecting unintended joystick motion conditions, command the MRF joystick resistance mechanism to increase the first joystick stiffness in a manner reducing susceptibility of the joystick device to unintended joystick motions.Type: ApplicationFiled: May 1, 2020Publication date: November 4, 2021Inventors: Todd F. Velde, Alex R. Vandegrift, Craig Christofferson, Christopher J. Meyer, Aaron R. Kenkel, Mark D. Anderson, Lance R. Sherlock, Kenneth Franck
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Publication number: 20210340724Abstract: Embodiments of a work vehicle magnetorheological fluid (MRF) joystick system include a joystick device, an MRF joystick resistance mechanism, a controller architecture, and a work vehicle sensor configured to provide sensor data indicative of an operational parameter pertaining to work vehicle. The MRF joystick resistance mechanism is controllable to vary an MRF resistance force resisting movement of a joystick included in the joystick device relative to a base housing thereof. The controller architecture is configured to: (i) monitor for variations in the operational parameter utilizing the sensor data; and (ii) provide tactile feedback through the joystick device indicative of the operational parameter by selectively commanding the MRF joystick resistance mechanism to adjust the MRF resistance force impeding joystick movement based, at least in part, on variations in the operational parameter.Type: ApplicationFiled: June 30, 2020Publication date: November 4, 2021Inventors: Aaron R. Kenkel, Todd F. Velde, Mark E. Breutzman, Jeffrey M. Stenoish, Matthew Sbai
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Patent number: 11136744Abstract: Vehicles and methods of operating vehicles are disclosed herein. A vehicle includes a main frame, a work implement, and a control system. The work implement is supported by the main frame and configured to carry a payload in use of the vehicle. The control system is supported by the main frame and configured to control operation of the vehicle. The control system includes a payload measurement system configured to provide payload input indicative of a variable payload carried by the work implement in use of the vehicle and a controller coupled to the payload measurement system.Type: GrantFiled: October 31, 2019Date of Patent: October 5, 2021Assignee: DEERE & COMPANYInventors: David Myers, Michael R. Gratton, Michael G. Kean, Todd F. Velde, Dustin T. Staade, Matthew Sbai, Ryan Detweiler, Grant R. Henn, Mary B. Wigginton, Aaron R. Kenkel
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Patent number: 11131083Abstract: A work machine that has a chassis, a payload section, a controller, a payload sensor in communication with the controller, and an orientation sensor that identifies the orientation of the work machine to the controller. The controller determines a center of gravity for the work machine considering a payload weight identified by the payload sensor and sends an alert when the location of the center of gravity and the orientation of the work machine create an unstable condition.Type: GrantFiled: October 31, 2019Date of Patent: September 28, 2021Assignee: DEERE & COMPANYInventors: Michael R. Gratton, David Myers, Aaron R. Kenkel, Michael G. Kean, Mary B. Wigginton, Grant R. Henn, Todd F. Velde, Joseph R. Keene, Dustin T. Staade, Kevin Campbell, Thomas L. Kennedy, William Staidl
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Patent number: 11091899Abstract: In accordance with an example embodiment, a hydraulic system may include a pump, reservoir, accumulator, hydraulic cylinder, ride control valve assembly, and controller. The ride control valve assembly may include a charging valve, discharging valve, and a head ride control valve. The controller may open the head ride control valve when a ride control feature has been activated, or open the charging valve if the ride control feature has not been activated and a hydraulic fluid warmup is to be performed.Type: GrantFiled: August 19, 2020Date of Patent: August 17, 2021Assignee: DEERE & COMPANYInventors: Aaron R. Kenkel, Grant R. Henn, Scott R. Stahle, Brian K. Kellogg
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Publication number: 20210222400Abstract: Vehicles and methods of operating vehicles are disclosed herein. A vehicle includes a main frame, a work implement, and a control system. The work implement is supported by the main frame and configured to carry a payload in use of the vehicle. The control system is supported by the main frame and configured to control operation of the vehicle. The control system includes a payload measurement system configured to provide payload input indicative of a variable payload carried by the work implement in use of the vehicle and a controller coupled to the payload measurement system.Type: ApplicationFiled: April 5, 2021Publication date: July 22, 2021Inventors: David Myers, Michael R. Gratton, Michael G. Kean, Todd F. Velde, Dustin T. Staade, Matthew Sbai, Ryan Detweiler, Grant R. Henn, Mary B. Wigginton, Aaron R. Kenkel