Machine drive line overspeed protection method
First Claim
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1. A method of controlling the speed of a driveshaft in a machine comprising the steps of:
- receiving a requested transmission gear signal associated with a transmission gear ratio;
determining an engine speed limit;
determining if the engine speed limit and the transmission gear ratio correspond to a driveshaft overspeed condition;
generating an overspeed protection action signal if the engine speed limit and the transmission gear ratio correspond to the driveshaft overspeed condition; and
limiting a driveshaft speed of the machine at least in part via a step of inhibiting operation of the machine in the transmission gear ratio responsive to the overspeed protection action signal.
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Abstract
A method of controlling driveshaft speed includes generating an overspeed protection action signal if an engine speed limit and a requested transmission gear ratio correspond to a driveshaft overspeed condition. An operating method for a machine includes disengaging a relatively higher transmission gear, and inhibiting re-engagement of the higher transmission gear responsive to an overspeed protection action signal. An electronic controller for the machine is configured to generate an overspeed protection action signal responsive to an engine speed limit and requested transmission gear ratio.
23 Citations
15 Claims
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1. A method of controlling the speed of a driveshaft in a machine comprising the steps of:
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receiving a requested transmission gear signal associated with a transmission gear ratio; determining an engine speed limit; determining if the engine speed limit and the transmission gear ratio correspond to a driveshaft overspeed condition; generating an overspeed protection action signal if the engine speed limit and the transmission gear ratio correspond to the driveshaft overspeed condition; and limiting a driveshaft speed of the machine at least in part via a step of inhibiting operation of the machine in the transmission gear ratio responsive to the overspeed protection action signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A machine comprising:
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an engine; a driveshaft; a transmission coupled with each of said engine and said driveshaft; an operator input device configured to output a requested transmission gear signal associated with a gear ratio of said transmission; and at least one electronic controller coupled with said transmission and with said operator input device, said at least one electronic controller being configured via an overspeed protection control algorithm to generate an overspeed protection action signal responsive to the requested transmission gear signal and an engine speed limit, if the gear ratio associated with the requested transmission gear signal and the engine speed limit correspond to a driveshaft overspeed condition, wherein said overspeed protection action signal comprises an inhibition signal associated with a transmission gear, wherein said at least one electronic controller is configured to control a around speed of said machine, and further configured to generate said inhibition signal responsive to a ground speed control fault condition. - View Dependent Claims (14, 15)
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Specification