Automatic lift and tip coordination control system and method of using same
First Claim
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1. A control device used on an off-highway vehicle, comprising:
- an implement;
a lift actuator associated with the implement;
a tilt actuator associated with the implement;
a command means for issuing a tip command signal corresponding to a desired implement tip angle position;
an engine speed sensor having an engine speed signal; and
control means for receiving the engine speed sensor signal and the tip command signal, calculating a change in implement height in response to the tip command signal, calculating lift actuator command signal to compensate for the blade height change, and issuing the lift actuator command signal to the lift actuator.
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Abstract
An automatic lift and tip coordination system for use in connection with an off-highway vehicle having an implement causes an automatic adjustment to the implement lift actuators in response to an operator change in the implement tip angle so that the implement height remains constant.
52 Citations
18 Claims
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1. A control device used on an off-highway vehicle, comprising:
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an implement; a lift actuator associated with the implement; a tilt actuator associated with the implement; a command means for issuing a tip command signal corresponding to a desired implement tip angle position; an engine speed sensor having an engine speed signal; and control means for receiving the engine speed sensor signal and the tip command signal, calculating a change in implement height in response to the tip command signal, calculating lift actuator command signal to compensate for the blade height change, and issuing the lift actuator command signal to the lift actuator. - View Dependent Claims (2)
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3. A control device for use with an off-highway vehicle, comprising:
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an implement; a lift actuator associated with the implement; a tilt actuator associated with the implement; an adjustment means for manually adjusting the implement tip angle; a position sensor connected to said manual adjustment means, said position sensor producing a manual adjustment signal; a tip position sensing means associated with the tilt actuator for sensing the position of the tilt actuator and outputting a tip position signal corresponding to said position; a lift position sensing means associated with the lift actuator for sensing the position of the lift actuator and outputting a lift position signal corresponding to said position; and control means for receiving the tip position signal, receiving the lift position signal, receiving the manual adjustment signal, calculating a change in implement height in response to a control command signal, and automatically issuing a lift actuator command signal. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. On an off-highway vehicle, a control device, comprising:
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an implement; a tilt cylinder connected to the implement; a lift cylinder connected to the implement; a first position sensor associated with the tilt cylinder; a second position sensor associated with the lift cylinder; a manual adjustment handle; a third position sensor associated with the manual adjustment handle; an electronic control adapted to receive a signal from the first, second and third position sensors, and responsively produce a lift command signal; a pressurized supply of hydraulic fluid; a tilt cylinder actuator valve hydraulically connected to the pressurized supply and the tilt cylinder; a lift cylinder actuator valve hydraulically connected to the pressurized supply and the lift cylinder, the lift cylinder actuator valve controlling the flow of hydraulic fluid from the pressurized supply to the lift cylinder responsive to the lift command signal. - View Dependent Claims (11, 12, 13)
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14. A method for controlling a off-highway vehicle having a tip mechanism and a lift mechanism associated with an implement, comprising the steps of:
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selecting a first implement tip angle position; sensing the position of the tip mechanism at said first selected implement tip angle position; selecting a second implement tip angle position; sensing the position of the tip mechanism at said second selected implement tip angle position; calculating a change in implement height corresponding to the change in sensed implement tip angle position from said first implement tip angle position to said second implement tip angle position; issuing a command signal to the lift mechanism; and moving the lift mechanism an amount corresponding to the command signal. - View Dependent Claims (15, 16, 17, 18)
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Specification