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公开(公告)号：US11787486B2
公开(公告)日：2023-10-17
申请号：US17848152
申请日：2022-06-23
发明人： Tessa Ronan , Vittorio Ziparo , Lawrence Klein , Ky Woodard
CPC分类号： B62D49/007 , B62D53/0821 , B62D53/12
摘要： A method detects and prevents stall of a drive motor of an autonomous electric tractor. A stall detector receives, at intervals, a motor current value from a drive circuit of the autonomous electric tractor, determines when the motor current value reaches or exceeds a first current threshold and applies brakes, inhibits a throttle controlling the drive motor, and sets a motor stall flag. A method determines a height above the ground of a landing gear of a trailer coupled with a tractor. A lift detector controls a hydraulic pump to pump a hydraulic fluid into a chamber of a piston coupled to a fifth wheel of the tractor to raise the fifth wheel. The lift detector senses, at intervals as the fifth wheel rises, a pressure value of the hydraulic fluid in the chamber and processes the pressure value to determine when the landing gear is lifted off the ground.
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公开(公告)号：US20240140541A1
公开(公告)日：2024-05-02
申请号：US18400956
申请日：2023-12-29
发明人： Tessa Ronan , Vittorio Ziparo , Lawrence Klein , Ky Woodard
CPC分类号： B62D49/007 , B62D53/0821 , B62D53/12
摘要： A device and method operated thereby may control a hydraulic pump to pump a hydraulic fluid into a chamber of a piston coupled to a fifth wheel of the tractor to raise the fifth wheel. The device, and method operated thereby, may sense, at intervals as the fifth wheel rises, a pressure value of the hydraulic fluid in the chamber. The device, and method operated thereby, may process the pressure values to determine when the landing gear is lifted off the ground.
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公开(公告)号：US20240116583A1
公开(公告)日：2024-04-11
申请号：US18380473
申请日：2023-10-16
发明人： Tessa Ronan , Vittorio Ziparo , Lawrence Klein , Ky Woodard
CPC分类号： B62D49/007 , B62D53/0821 , B62D53/12
摘要： A device and method operated thereby may control a hydraulic pump to pump a hydraulic fluid into a chamber of a piston coupled to a fifth wheel of the tractor to raise the fifth wheel. The device, and method operated thereby, may sense, at intervals as the fifth wheel rises, a pressure value of the hydraulic fluid in the chamber. The device, and method operated thereby, may process the pressure values to determine when the landing gear is lifted off the ground.
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公开(公告)号：US20240132167A1
公开(公告)日：2024-04-25
申请号：US18401061
申请日：2023-12-29
发明人： Ira Alexander Renfrew , Luciano Spinello , James McKenna , Tessa Ronan , Vittorio Ziparo , Lawrence Klein , Ky Woodard
CPC分类号： B62D49/007 , B62D53/0821 , B62D53/12
摘要： Systems and methods determines that a trailer being towed by an autonomous electric tractor has its brakes applied when a motor current value of a drive motor of the autonomous electric tractor reaches or exceeds a first current threshold. a recover handler initiates a set of actions to recover resolve the trailer brake problem. A trailer lift status indicating whether a landing gear of the trailer is off the ground and a lift metric indicative of a height of the landing gear off the ground are determined by a perception module using one or more of images, point clouds, and radar data that include the trailer.
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公开(公告)号：US20220410986A1
公开(公告)日：2022-12-29
申请号：US17848152
申请日：2022-06-23
发明人： Tessa Ronan , Vittorio Ziparo , Lawrence Klein , Ky Woodard
摘要： A method detects and prevents stall of a drive motor of an autonomous electric tractor. A stall detector receives, at intervals, a motor current value from a drive circuit of the autonomous electric tractor, determines when the motor current value reaches or exceeds a first current threshold and applies brakes, inhibits a throttle controlling the drive motor, and sets a motor stall flag. A method determines a height above the ground of a landing gear of a trailer coupled with a tractor. A lift detector controls a hydraulic pump to pump a hydraulic fluid into a chamber of a piston coupled to a fifth wheel of the tractor to raise the fifth wheel. The lift detector senses, at intervals as the fifth wheel rises, a pressure value of the hydraulic fluid in the chamber and processes the pressure value to determine when the landing gear is lifted off the ground.
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