US3890832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine torque monitoring system
Assignee: Dresser Rand Co
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Filing: 1974-02-14
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Granted: 1975-06-24
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Expires: 1994-02-14
Abstract
Abstract The engine horsepower is computed as a function of the engine fuel flow rate and the engine torque is derived by the division of the horsepower signal by a signal functionally related to the engine speed. The actual torque of the engine is compared to a torque set point and upon a given deviation from the set point, corrective signals are actuated to return the actual torque to its set point. Upon too great a deviation, an alarm is actuated and the engine is completely unloaded. When used with ambient uprated engines, a temperature signal representing engine capability is used to limit the torque set point to its maximum allowable setting. Upon loss of the signal representing engine capability, the allowable torque is reduced as though there were no up-rating of the engine. The fuel flow computer utilizes signals from the differential pressure of the fuel, the static pressure of the fuel and the temperature of the fuel to produce a signal indicative of the square root of the product of the two pressure parameters divided by a signal functionally related to the fuel temperature.
Inventors
- 👤 Charles F Nick
- 👤 Morris J Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:24
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/24; G06; G06G; G06G7/00; G06G7/48; G06G7/64; F; F02; F02D; F02D2250/00; F02D2250/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
A system for monitoring the torque on an engine, comprising: means for generating a first electrical signal functionally related to such torque; means for generating a second electrical signal indicative of a desired torque set point; means for comparing said first and said second electrical signals to establish the deviation therebetween; and means for generating a third electrical signal functionally related to a performance characteristic of the engine and means for limiting said second electrical signal with said third electrical signal.
Claim 2
Independent Claim
81 words
A system for monitoring the torque on an engine, comprising: means for generating a first electrical signal functionally related to such torque; means for generating a second electrical signal indicative of a desired torque set point; means for comparing said first and said second electrical signals to establish the deviation therebetween; and means for generating a third electrical signal functionally related to a performance characteristic of the engine and means for limiting said second electrical signal with said third electrical signal.
Claim 3
Independent Claim
96 words
A system for monitoring the torque on an engine, comprising: means for generating a first electrical signal functionally related to such torque; means for generating a second electrical signal indicative of a desired torque set point; means for generating a third electrical signal functionally related to a performance characteristic of the engine; means for selecting either said second or said third electrical signal; and means for comparing said first signal with said selected signal to establish the deviation therebetween, said means for selecting being based upon the smaller of the second and third signals being selected.
Claim 4
Independent Claim
96 words
A system for monitoring the torque on an engine, comprising: means for generating a first electrical signal functionally related to such torque; means for generating a second electrical signal indicative of a desired torque set point; means for generating a third electrical signal functionally related to a performance characteristic of the engine; means for selecting either said second or said third electrical signal; and means for comparing said first signal with said selected signal to establish the deviation therebetween, said means for selecting being based upon the smaller of the second and third signals being selected.
Claim 5
Dependent Claim
18 words
The system according to claim 2 wherein said performance characteristic is the scavenging air temperature of the engine.
Claim 6
Dependent Claim
39 words
The system according to claim 2, including in addition thereto, means for limiting said third electrical signal to a predetermined level in the event of loss of the functional relationship between Said performance characteristic and said third electrical signal.
Claim 7
Dependent Claim
33 words
The system according to claim 4 wherein said third electrical signal is limited to a level functionally related to 100% of the allowable torque on the engine in the event of said loss.
Claim 8
Independent Claim
93 words
A system for monitoring the torque on an engine, comprising: means for generating a first electrical signal functionally related to such torque; means for generating a second electrical signal indicative of a desired torque set point; means for comparing said first and said second electrical signals to establish the deviation therebetween; and means connected to said comparison means for generating a third electrical signal functionally related to said first signal being larger than said second signal and a fourth electrical signal functionally related to said first signal being smaller than said second signal.
Claim 9
Independent Claim
93 words
A system for monitoring the torque on an engine, comprising: means for generating a first electrical signal functionally related to such torque; means for generating a second electrical signal indicative of a desired torque set point; means for comparing said first and said second electrical signals to establish the deviation therebetween; and means connected to said comparison means for generating a third electrical signal functionally related to said first signal being larger than said second signal and a fourth electrical signal functionally related to said first signal being smaller than said second signal.
Claim 10
Dependent Claim
39 words
The system according to claim 6, including in addition thereto, means for generating a fifth electrical signal functionally related to a performance characteristic of the engine and means for limiting said second electrical signal with said fifth electrical signal.
References Cited (Backward Citations)
US2553526A
Cited
US3181353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |