System and method for controlling a vehicle
First Claim
Patent Images
1. A system comprising:
- a control unit configured to be electrically coupled to a drive system of the vehicle, the drive system including at least one traction motor for providing motive power to the vehicle;
wherein the control unit is configured to control a torque output of the at least one traction motor to hold zero speed or near zero speed of the vehicle on a grade without knowing information, in at least one mode of operation, about at least one of the grade or a load of the vehicle;
and wherein the control unit is configured to calculate a deceleration of the vehicle and control the torque output of the at least one traction motor in dependence upon the deceleration that is calculated to hold the vehicle at the zero speed or near zero speed.
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Accused Products
Abstract
A control system for a vehicle comprises a control unit configured to be electrically coupled to a drive system of the vehicle. The drive system includes at least one traction motor for providing motive power to the vehicle. The control unit is configured to control a torque output of the traction motor to hold zero speed or near zero speed of the vehicle on a grade without knowing information, in at least one mode of operation, about the grade and/or a load of the vehicle, and without a service brake of the vehicle being activated.
15 Citations
19 Claims
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1. A system comprising:
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a control unit configured to be electrically coupled to a drive system of the vehicle, the drive system including at least one traction motor for providing motive power to the vehicle; wherein the control unit is configured to control a torque output of the at least one traction motor to hold zero speed or near zero speed of the vehicle on a grade without knowing information, in at least one mode of operation, about at least one of the grade or a load of the vehicle; and wherein the control unit is configured to calculate a deceleration of the vehicle and control the torque output of the at least one traction motor in dependence upon the deceleration that is calculated to hold the vehicle at the zero speed or near zero speed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
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a control unit configured to be electrically coupled to a drive system of the vehicle, the drive system including at least one traction motor for providing motive power to the vehicle; wherein the control unit is configured to control a torque output of the at least one traction motor to hold zero speed or near zero speed of the vehicle on a grade without knowing information, in at least one mode of operation, about at least one of the grade or a load of the vehicle; and the control unit is configured to actively manage the vehicle to a target deceleration to a selectable speed, without applying a service brake of the vehicle, by controlling the torque output of the at least one traction motor.
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9. A system comprising:
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a control unit configured to be electrically coupled to a drive system of the vehicle, the drive system including at least one traction motor for providing motive power to the vehicle; wherein the control unit is configured to control a torque output of the at least one traction motor to hold zero speed or near zero speed of the vehicle on a grade without knowing information, in at least one mode of operation, about at least one of the grade or a load of the vehicle, and without a service brake of the vehicle being activated; and wherein the control unit is configured to automatically control the torque output of the at least one traction motor to hold the zero speed or the near zero speed of the vehicle on the grade responsive to;
in a first mode of operation, an acceleration of the vehicle decreasing below a first designated threshold;
in a second mode of operation, deactivation of an operator accelerator control of the vehicle below a second designated threshold; and
in a third mode of operation, actuation of the operator accelerator control from a first, deactivated state to a second, activated state that is insufficient in terms of causing acceleration of the vehicle to avoid vehicle rollback absent application of the service brake and operation of the control unit to automatically control holding the vehicle at the zero speed or near zero speed.
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10. A method for controlling a vehicle, comprising:
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electrically powering a drive system of the vehicle for vehicle propulsion, the drive system including at least one traction motor; with a control unit of the vehicle, controlling a torque output of the at least one traction motor to hold zero speed or near zero speed of the vehicle on a grade without knowing information, in at least one mode of operation, about at least one of the grade or a load of the vehicle; with the control unit, calculating a deceleration of the vehicle; and wherein the torque output of the at least one traction motor is controlled in dependence upon the deceleration that is calculated to hold the vehicle at the zero speed or near zero speed. - View Dependent Claims (11, 12, 13)
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14. A method for controlling a vehicle on grade, comprising:
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determining, with a control unit on-board the vehicle, a calculated deceleration of the vehicle; and with the control unit, controlling a torque output of at least one traction motor of the vehicle, based at least in part on the calculated deceleration, to a target deceleration of the vehicle to a selected speed, without applying a service brake of the vehicle. - View Dependent Claims (15, 16, 17)
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18. A vehicle comprising:
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at least one traction motor; a power system configured to convert received electrical power to electrical signals for powering the at least one traction motor to move the vehicle; and a control unit electrically coupled to the power system, wherein the control unit is configured to electrically communicate a torque request signal to the power system to control a torque output of the at least one traction motor to hold zero speed or near zero speed of the vehicle on a grade without knowing information, in at least one mode of operation, about the grade and/or a load of the vehicle; and
determine a calculated deceleration of the vehicle, and to electrically communicate the torque request signal to the power system to control the torque output of the at least one traction motor, based at least in part on the calculated deceleration, to a target deceleration of the vehicle to a selected speed, without applying a service brake of the vehicle. - View Dependent Claims (19)
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Specification