High low engine speed cruise control
First Claim
Patent Images
1. A high low cruise control system for controlling an engine speed of a work machine, comprising:
- a first input positionable by an operator at a selected position within a range of positions for selecting a corresponding engine speed within a range of engine speeds;
a second input operable by the operator for initiating or adjusting operation of a first mode or a second mode;
a third input operable by the operator to disable the first mode or the second mode; and
a controller operable for receiving the first input, the second input, the third input, and information representative of the engine speed of the work machine, and outputting a signal representative of an engine speed command;
the controller being operable in response to operation of the second input with a first command to initiate operation of the controller in the first mode for setting a first mode engine speed limit based on a first selected position of the first input, and thereafter being operable for adjusting the first mode engine speed limit based solely on operation of the second input in at least one predetermined manner and independent of the position of the first input and the engine speed, and for determining the engine speed command based on comparison of the first mode engine speed limit and the engine speed corresponding to the position of the first input at that time;
the controller being operable in response to operation of the second input with a second command to initiate operation of the controller in the second mode for setting a second mode engine speed limit based on a second selected position of the first input, and thereafter being operable for adjusting the second mode engine speed limit based solely on operation of the second input in at least one predetermined manner and independent of the position of the first input and the engine speed, and for determining the engine speed command based on comparison of the second mode engine speed limit and the engine speed corresponding to the position of the first input at that time; and
the controller being operable in absence of the first mode and the second mode for determining the engine speed command based on the engine speed corresponding to the position of the first input at that time.
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Abstract
A high low cruise control system for a work machine that allows the operator to set and adjust an upper engine speed limit in an upper limit mode or a lower engine speed limit in a lower limit mode and return to these set points easily. Without exiting the cruise control mode, the operator may decrease engine speed while in the upper limit mode, or increase engine speed while in the lower limit mode.
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Citations
12 Claims
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1. A high low cruise control system for controlling an engine speed of a work machine, comprising:
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a first input positionable by an operator at a selected position within a range of positions for selecting a corresponding engine speed within a range of engine speeds; a second input operable by the operator for initiating or adjusting operation of a first mode or a second mode; a third input operable by the operator to disable the first mode or the second mode; and a controller operable for receiving the first input, the second input, the third input, and information representative of the engine speed of the work machine, and outputting a signal representative of an engine speed command; the controller being operable in response to operation of the second input with a first command to initiate operation of the controller in the first mode for setting a first mode engine speed limit based on a first selected position of the first input, and thereafter being operable for adjusting the first mode engine speed limit based solely on operation of the second input in at least one predetermined manner and independent of the position of the first input and the engine speed, and for determining the engine speed command based on comparison of the first mode engine speed limit and the engine speed corresponding to the position of the first input at that time; the controller being operable in response to operation of the second input with a second command to initiate operation of the controller in the second mode for setting a second mode engine speed limit based on a second selected position of the first input, and thereafter being operable for adjusting the second mode engine speed limit based solely on operation of the second input in at least one predetermined manner and independent of the position of the first input and the engine speed, and for determining the engine speed command based on comparison of the second mode engine speed limit and the engine speed corresponding to the position of the first input at that time; and the controller being operable in absence of the first mode and the second mode for determining the engine speed command based on the engine speed corresponding to the position of the first input at that time. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A high low cruise control system for controlling engine speed of a work machine, comprising:
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a throttle positionable at a selectable position within a range of positions for selecting a corresponding engine speed within a range of engine speeds; an input device operable by an operator for initiating a maximum engine speed throttle command or a minimum engine speed throttle command based on the selected position of the throttle at that time, and thereafter the maximum engine speed throttle command or the minimum engine speed throttle command being incrementally adjustable by operation solely of the input device in at least one predetermined manner and regardless of the position of the throttle and the engine speed; and a controller operable for comparing the engine speed corresponding to the selected throttle position to the maximum engine speed throttle command or the minimum engine speed throttle command, and outputting an engine speed throttle command equal to the engine speed corresponding to the throttle position when the engine speed corresponding to the throttle position is less than the maximum engine speed throttle command or is greater than the minimum engine speed throttle command, equal to the maximum engine speed throttle command when the engine speed corresponding to the throttle position is greater than or equal to the maximum engine speed throttle command, or equal to the minimum engine speed throttle command when the engine speed corresponding to the throttle position is less than or equal to the minimum engine speed throttle command. - View Dependent Claims (9, 10, 11)
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12. A method for controlling an engine speed of a work machine, comprising the steps of:
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providing a first input positionable by an operator at a selected position within a range of positions for selecting a corresponding engine speed within a range of engine speeds; providing a second input operable by the operator for initiating or adjusting operation of the system in a first mode or a second mode; providing a third input operable by the operator to disable the first mode or the second mode; and providing a controller operable for receiving the first input, the second input, the third input, and information representative of the engine speed of the work machine, and outputting a signal representative of an engine speed command; initiating the first mode and setting a first mode engine speed limit based on a first selected position of the first input in response to a first command of the second input, and thereafter adjusting the first mode engine speed limit based solely on operation of the second input in at least one predetermined manner and independent of the position of the first input and the engine speed, and determining the engine speed command based on comparison of the first mode engine speed limit and the engine speed corresponding to the position of the first input at that time; initiating the second mode and setting a second mode engine speed limit based on a second selected position of the first input in response to a second command of the second input, and thereafter adjusting the second mode engine speed limit based solely on operation of the second input in at least one predetermined manner and independent of the position of the first input and the engine speed, and determining the engine speed command based on comparison of the second mode engine speed limit and the engine speed corresponding to the position of the first input at that time; and in absence of the first mode and the second mode determining the engine speed command based on the engine speed corresponding to the position of the first input at that time.
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Specification