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US 12,535,091 B2Granted
Prognostics in hydraulic transmission system using e-machine drive
AssigneeDeere & Company
InventorsSubhabrata Gupta, Sourabha Gokhale
Life of this patent
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Abstract
A device for determining fluid degradation includes a memory and processing circuitry configured to cause the device to generate first calibration data of an e-machine at a first time, generate second calibration data of the e-machine at a second time subsequent to the first time, and determine that the fluid is degraded in response to a difference between the first calibration data and the second calibration data being greater than or equal to a degradation threshold.
Claims19
A device for determining fluid degradation, the device comprising:
- a memory;
- and
- processing circuitry configured to cause the device to
- characterize an interdependency of a plurality of valves by correlating output parameters, caused by actuation of each valve of the plurality of valves, with input parameters,
- generate first calibration data of an electronic machine (e-machine) at a first time, the first calibration data based on the interdependency of the plurality of valves,
- generate second calibration data of the e-machine at a second time subsequent to the first time,
- determine that the fluid is degraded in response to a difference between the first calibration data and the second calibration data being greater than or equal to a degradation threshold,
- determine that there is a leakage in response to the difference between the first calibration data and the second calibration data being outside of the degradation threshold, and
- stop an operation of a hydraulic system in response to determining that there is a leakage, the hydraulic system including the e-machine.
6 more elements
A system for determining fluid degradation, the system comprising:
- a hydraulic pump;
- an electronic machine (e-machine) configured to drive the hydraulic pump;
- and
- processing circuitry configured to cause the system to
- characterize an interdependency of a plurality of valves by correlating output parameters, caused by actuation of each valve of the plurality of valves, with input parameters,
- generate first calibration data of an e-machine at a first time, the first calibration data based on the interdependency of the plurality of valves,
- generate second calibration data of the e-machine at a second time subsequent to the first time,
- determine that the fluid is degraded in response to a difference between the first calibration data and the second calibration data being greater than or equal to a degradation threshold,
- determine that there is a leakage in response to the difference between the first calibration data and second calibration data being outside of the degradation threshold,
- stop an operation of a hydraulic system in response to determining that there is a leakage, the hydraulic system including the e-machine.
7 more elements
A method for determining fluid degradation of a hydraulic system, the method comprising:
- characterizing an interdependency of a plurality of valves by correlating output parameters, caused by actuation of each valve of the plurality of valves, with input parameters;
- generating first calibration data of an electronic machine (e-machine) at a first time, the first calibration data based on the interdependency of the plurality of valves;
- generating second calibration data of the e-machine at a second time subsequent to the first time;
- determining that the fluid is degraded in response to a difference between the first calibration data and the second calibration data being greater than or equal to a degradation threshold;
- determining that there is a leakage in response to the difference between the first calibration data and the second calibration data being outside of the degradation threshold;
- and
- stopping an operation of the hydraulic system in response to determining that there is a leakage.
4 more elements
A device for determining fluid degradation, the device comprising:
- a memory;
- and
- processing circuitry configured to cause the device to
- characterize an interdependency of a plurality of valves by correlating output parameters, caused by actuation of each valve of the plurality of valves, with input parameters,
- generate first calibration data of an electronic machine (e-machine) at a first time, the interdependency of the plurality of valves and first calibration data based on a first torque profile of the e-machine at the first time,
- generate second calibration data of the e-machine at a second time subsequent to the first time, the second calibration data based on a second torque profile of the e-machine at the second time,
- determine that the fluid is degraded in response to a difference between the first calibration data and the second calibration data being greater than or equal to a degradation threshold,
- determine that there is a leakage in response to the difference between the first calibration data and the second calibration data being outside of the degradation threshold, and
- stop an operation of a hydraulic system in response to determining that there is a leakage, the hydraulic system including the e-machine.
6 more elements
Dependencies are inferred from the claim text.