Loader boom control system
First Claim
1. A work vehicle comprising:
- a frame;
an engine mounted to the frame;
a plurality of wheels connected to the frame and being rotatable relative to the frame, and at least one of the wheels being driven by the engine;
a boom having a first end and a second end, the first end being pivotally attached to the frame about a boom pivot;
a tool pivotally attached to the second end of the boom about a tool pivot, the tool being adapted to perform a work function;
a boom actuator connected to the boom, the boom actuator being adapted to controllably move the boom about the boom pivot in response to receiving a boom control signal; and
a controller in communication with the boom actuator, the controller being adapted to determine the boom velocity, to compare the boom velocity to a commanded velocity to obtain a velocity error, and to de-rate the tractive effort of the wheels in response to the velocity error.
1 Assignment
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Accused Products
Abstract
A work vehicle that includes a boom; a boom actuator connected to the boom, the boom actuator being adapted to controllably move the boom about a boom pivot in response to receiving a boom control signal; and a controller having computational and time-keeping capabilities. The controller communicates with the boom actuator, and calculates the boom velocity, compares the calculated velocity to a commanded velocity to obtain a velocity error, and, if necessary, de-rates the tractive effort of the wheels to prevent the boom from stalling. The controller also determines if the operator is actuating the boom, and reads the boom position to calculate the boom velocity based upon the current boom position and a previous boom position. The controller uses a predefined algorithm to de-rate the tractive effort of the wheels as a function of the power train configuration.
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Citations
25 Claims
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1. A work vehicle comprising:
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a frame; an engine mounted to the frame; a plurality of wheels connected to the frame and being rotatable relative to the frame, and at least one of the wheels being driven by the engine; a boom having a first end and a second end, the first end being pivotally attached to the frame about a boom pivot; a tool pivotally attached to the second end of the boom about a tool pivot, the tool being adapted to perform a work function; a boom actuator connected to the boom, the boom actuator being adapted to controllably move the boom about the boom pivot in response to receiving a boom control signal; and a controller in communication with the boom actuator, the controller being adapted to determine the boom velocity, to compare the boom velocity to a commanded velocity to obtain a velocity error, and to de-rate the tractive effort of the wheels in response to the velocity error. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for controlling a boom of a work vehicle comprising the steps of:
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providing a work vehicle having a frame, an engine mounted to the frame, a plurality of wheels with at least one of the wheels being driven by the engine, a boom having a first end pivotally attached to the frame about a boom pivot, a boom actuator being adapted to controllably move the boom about the pivot in response to receiving a boom control signal, and a controller in communication with the boom actuator; determining if the operator is actuating the boom and reading the boom position; determining the boom velocity; comparing the boom velocity to a commanded velocity to obtain a velocity error; and decreasing the speed of the engine in response to the velocity error to increase the speed of the boom. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A boom control system for a work vehicle having a boom and a component that drives the work vehicle, the boom control system comprising:
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a boom actuator connected to the boom, the boom actuator being adapted to controllably move the boom about a pivot in response to receiving a boom control signal; a sensor capable of sensing the boom; and a controller in communication with the boom actuator, the sensor, and the component that drives the work vehicle, the controller being adapted to determine if the operator is actuating the boom, to determine the boom velocity using the sensor, and to compare the boom velocity to a commanded velocity in order to obtain a velocity error, the controller decreasing power from the component in response to the velocity error to increase the speed of the boom. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification