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公开(公告)号：US11499292B2
公开(公告)日：2022-11-15
申请号：US16864696
申请日：2020-05-01
申请人： Deere & Company
发明人： 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
摘要： 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.
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公开(公告)号：US11421399B2
公开(公告)日：2022-08-23
申请号：US16670262
申请日：2019-10-31
申请人： DEERE & COMPANY
发明人： 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
摘要： 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.
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23.发明申请公开(公告)号：US20210341032A1
公开(公告)日：2021-11-04
申请号：US16864749
申请日：2020-05-01
申请人： Deere & Company
发明人： Todd F. Velde , Alex R. Vandegrift , Craig Christofferson , Christopher J. Meyer , Aaron R. Kenkel , Mark D. Anderson , Lance R. Sherlock , Kenneth Franck
摘要： 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.
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公开(公告)号：US20210340724A1
公开(公告)日：2021-11-04
申请号：US16916800
申请日：2020-06-30
申请人： Deere & Company
摘要： 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.
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公开(公告)号：US11091899B1
公开(公告)日：2021-08-17
申请号：US16947843
申请日：2020-08-19
申请人： Deere & Company
IPC分类号： E02F9/22 , F15B1/02 , F15B21/0427 , F15B21/00
摘要： 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.
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公开(公告)号：US20210131072A1
公开(公告)日：2021-05-06
申请号：US16670021
申请日：2019-10-31
申请人： DEERE & COMPANY
发明人： 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
摘要： 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.
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公开(公告)号：US10422358B2
公开(公告)日：2019-09-24
申请号：US15798552
申请日：2017-10-31
申请人： Deere & Company
发明人： Grant R. Henn , Aaron R. Kenkel
IPC分类号： F15B13/042 , F15B13/044 , E02F9/22 , F16K31/06 , F15B13/043 , F15B13/02
摘要： A method for controlling a valve spool that includes providing a control valve having a first end and a second end with a spool disposed therebetween, a hydraulic component, a controller, a first control circuit and a second control circuit, selectively controlling the pressure in the first end and the second end with the controller, identifying an active state, with the controller, and applying an active pressure to both the first end and the second end with the corresponding first control circuit and second control circuit during the active state, and identifying a first command, with the controller, and providing a command pressure to the first end through the first control circuit and a release pressure to the second end through the second control circuit during the first command. Wherein, the spool is moved within the control valve and the hydraulic component is engaged during the first command.
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公开(公告)号：US10408241B2
公开(公告)日：2019-09-10
申请号：US15933478
申请日：2018-03-23
申请人： DEERE & COMPANY
摘要： In accordance with an example embodiment, a method includes monitoring a position of an actuator during operation of the actuator, determining that an actuator command value is greater than an actuator command value threshold, starting a timer upon a movement of the actuator through a starting position during the operation of the actuator at the actuator command value, determining satisfaction of at least one condition, and stopping the timer upon satisfaction of the at least one condition and movement of the actuator through an ending position.
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公开(公告)号：US20190093310A1
公开(公告)日：2019-03-28
申请号：US15717108
申请日：2017-09-27
申请人： Deere & Company
摘要： An implement vibration system and method is disclosed that includes a vibration activation device; an electrohydraulic mechanism and a controller. The controller monitors the vibration activation device and sends movement signals to the electrohydraulic mechanism to control implement movement. When the vibration activation device is activated, the controller sends vibration signals to the electrohydraulic mechanism to cause the implement to vibrate. An operator control can send implement commands where the movement signals are based on the implement commands, and when vibration is activated the controller can superimpose the vibration signals on the movement signals. The vibration signals can cause a hydraulic cylinder to repeatedly extend and retract. An electrohydraulic control valve can receive the movement signals and control hydraulic flow to the hydraulic cylinder based on the movement signals. The vibration signals can be complementary signals. The amplitude and/or frequency of the vibration signals can be adjustable.
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公开(公告)号：US20160290523A1
公开(公告)日：2016-10-06
申请号：US14676387
申请日：2015-04-01
申请人： DEERE & COMPANY
发明人： Aaron R. Kenkel
IPC分类号： F16K31/02
CPC分类号： F16K31/02 , F15B1/00 , F15B19/002 , F15B2211/30525 , F15B2211/6309 , F15B2211/6313 , F16K31/0613 , F16K37/0091
摘要： A valve calibration system and method is disclosed for an electrohydraulic valve having upstream and downstream sides. A valve current controls the valve orifice size connecting the upstream and downstream sides. The calibration method includes opening the valve, stalling the system to prevent volume changes, and closing the valve with substantially equalized upstream and downstream pressures; then increasing upstream pressure, and finding a calibration current that provides a calibration orifice size through the valve by monitoring downstream pressure. Finding a calibration current can include stepping through valve control currents, sensing downstream pressures, and calculating step orifice sizes until the calculated step orifice size is greater than or equal to the calibration orifice size. Finding a calibration current can include performing a coarse calibration followed by a finer calibration. An offset can be calculated for a valve characteristic relating valve control current to valve orifice size.
摘要翻译： 公开了一种具有上游侧和下游侧的电动液压阀的阀校准系统和方法。 阀门电流控制连接上游侧和下游侧的阀孔尺寸。 校准方法包括打开阀门，使系统失速以防止体积变化，并且以大致相等的上游和下游压力关闭阀门; 然后增加上游压力，并且通过监测下游压力找到校准电流，该校准电流通过阀提供校准孔尺寸。 寻找校准电流可以包括逐步通过阀门控制电流，感测下游压力，以及计算步骤孔径尺寸，直到计算的台阶孔尺寸大于或等于校准孔尺寸。 寻找校准电流可以包括执行粗校准，然后进行更精细的校准。 可以计算阀门特性的偏移量，将阀门控制电流与阀门孔口尺寸相关联。
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