Operation of wheeled work machine
First Claim
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1. A method of controlling a hydrostatic motor configured to drive a wheeled work machine and to control speed of travel of the wheeled work machine having an electronic controller, an acceleration operator input mechanism operably coupled to the electronic controller, and a deceleration operator input mechanism operably coupled to the electronic controller, comprising:
- sensing movement of the acceleration operator input mechanism from a first position associated with a first speed set point to a second position;
obtaining a second speed set point associated with the second position;
if the second speed set point is greater than the first speed set point, controlling the hydrostatic motor to accelerate the machine from the first speed set point to the second speed set point according to a predetermined acceleration curve;
sensing movement of the deceleration operator input mechanism from a neutral position to a first non-neutral position;
determining a rate of deceleration based on the non-neutral position of the deceleration operator input mechanism; and
controlling the hydrostatic motor to decelerate the machine based on the rate of deceleration determined.
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Abstract
The present invention includes a control system for, or methods of controlling a wheeled work machine to accommodate desired travel control. Acceleration and deceleration inputs are provided, as is a controller for controlling hydrostatic motors to achieve desired acceleration and deceleration profiles.
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Citations
24 Claims
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1. A method of controlling a hydrostatic motor configured to drive a wheeled work machine and to control speed of travel of the wheeled work machine having an electronic controller, an acceleration operator input mechanism operably coupled to the electronic controller, and a deceleration operator input mechanism operably coupled to the electronic controller, comprising:
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sensing movement of the acceleration operator input mechanism from a first position associated with a first speed set point to a second position;
obtaining a second speed set point associated with the second position;
if the second speed set point is greater than the first speed set point, controlling the hydrostatic motor to accelerate the machine from the first speed set point to the second speed set point according to a predetermined acceleration curve;
sensing movement of the deceleration operator input mechanism from a neutral position to a first non-neutral position;
determining a rate of deceleration based on the non-neutral position of the deceleration operator input mechanism; and
controlling the hydrostatic motor to decelerate the machine based on the rate of deceleration determined. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wheeled work machine, comprising:
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a frame;
an operator compartment supported by the frame;
a set of wheels coupled to the frame;
a hydrostatic motor coupled to the wheels to drive the wheels and to control speed of travel of a wheeled work machine;
an electronic controller;
an acceleration operator input mechanism operably coupled to the electronic controller; and
a deceleration operator input mechanism operably coupled to the electronic controller;
wherein the controller is configured to sense movement of the acceleration operator input mechanism from a first position associated with a first speed set point to a second position, obtain a second speed set point associated with the second position, and if the second speed set point is greater than the first speed set point, provide a speed signal to the hydrostatic motor to control the hydrostatic motor to accelerate the machine from the first speed set point to the second speed set point according to a predetermined acceleration curve; and
wherein the controller is further configured to sense movement of the deceleration operator input mechanism from a neutral position to a first non-neutral position;
determine a rate of deceleration based on the non-neutral position of the deceleration operator input mechanism; and
control the hydrostatic motor to decelerate the machine based on the rate of deceleration determined. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification