Power-based underspeed control
First Claim
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1. A method of adjusting the operation of an engine-driven machine to avoid engine under-speeding, the method comprising:
- receiving an initial command specifying a value related to a desired torque;
converting the received command into a power command;
sensing an engine under-speed condition;
reducing the power command to an underspeed processed power command;
converting the underspeed processed power command to units that are the same as the units of the initial command; and
issuing the converted underspeed processed power command to a portion of the machine to alleviate the engine under-speeding condition.
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Abstract
A method of adjusting the operation of an engine-driven machine to avoid engine under-speeding entails converting a received speed or torque command into a power command. When an engine under-speed condition is sensed, the system performs underspeed correction in the power domain before converting the underspeed processed power command back into the units of the original domain. The converted underspeed processed power command is issued to the transmission or other component to alleviate the engine under-speeding condition.
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Citations
20 Claims
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1. A method of adjusting the operation of an engine-driven machine to avoid engine under-speeding, the method comprising:
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receiving an initial command specifying a value related to a desired torque; converting the received command into a power command; sensing an engine under-speed condition; reducing the power command to an underspeed processed power command; converting the underspeed processed power command to units that are the same as the units of the initial command; and issuing the converted underspeed processed power command to a portion of the machine to alleviate the engine under-speeding condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A controller for adjusting the operation of an engine-driven machine to avoid engine under-speeding, the controller comprising:
a computer readable medium including computer-readable instructions, the computer-readable instructions including; instructions for receiving an initial command specifying a value related to a desired torque; instructions for converting the received command into a power command; instructions for sensing an engine under-speed condition; instructions for reducing the power command to an underspeed processed power command; instructions for converting the underspeed processed power command to units that are the same as the units of the initial command; and instructions for issuing the converted underspeed processed power command to a portion of the machine to alleviate the engine under-speeding condition. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An engine-driven machine having a power-domain underspeed function, the machine comprising:
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an engine; a transmission linked to the engine; and a controller for receiving data from the engine and for sending commands to the transmission, the controller being adapted to detect an engine underspeed condition and to convert a received command in a first domain into a power command and to perform underspeed processing on the power command to produce a reduced power command, convert the reduced power command into a final command in the first domain. - View Dependent Claims (18, 19, 20)
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Specification