US6131539A
Expired / Lapsed
US
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System and method for enhanced engine monitoring and protection
Assignee: MTU DETROIT DIESEL Inc
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Filing: 1999-06-30
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Granted: 2000-10-17
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Expires: 2019-06-30
Abstract
Abstract A system and method for monitoring and controlling an engine based on an engine fluid pressure include sensing an engine fluid pressure, determining a current value for an engine operating parameter, determining whether the engine fluid pressure has crossed a first threshold corresponding to the current value of the engine operating parameter, determining whether the engine fluid pressure has crossed a second threshold corresponding to the current value of the engine operating parameter, generating a warning signal when the fluid pressure has crossed the first threshold but has not crossed the second threshold, and generating a shutdown signal when the fluid pressure has crossed the second threshold. In one embodiment, the second threshold is determined based on the first threshold by applying a constant offset value.
Inventors
- 👤 Eric D. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:42
CPC Classifications
F; F01; F01P; F01P5/00; F01P5/14; F01P11/00; F01P11/14; F01P11/18; F01M; F01M1/00; F01M1/18; F01M1/20; F01M1/22; F02; F02D; F02D41/00; F02D41/22; F01P2025/00; F01P2025/04; F01P2025/60; F01P2025/62; F01P2025/64; F01P2031/00; F01P2031/22; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
99 words
A method for controlling an engine, the method comprising: sensing an engine fluid pressure; determining a current value for an engine operating parameter; determining whether the engine fluid pressure has crossed a first threshold corresponding to the current value of the engine operating parameter; determining whether the engine fluid pressure has crossed a second threshold corresponding to the current value of the engine operating parameter; generating a warning signal when the fluid pressure has crossed the first threshold but has not crossed the second threshold; and generating a shutdown signal when the fluid pressure has crossed the second threshold.
Claim 2
Independent Claim
99 words
A method for controlling an engine, the method comprising: sensing an engine fluid pressure; determining a current value for an engine operating parameter; determining whether the engine fluid pressure has crossed a first threshold corresponding to the current value of the engine operating parameter; determining whether the engine fluid pressure has crossed a second threshold corresponding to the current value of the engine operating parameter; generating a warning signal when the fluid pressure has crossed the first threshold but has not crossed the second threshold; and generating a shutdown signal when the fluid pressure has crossed the second threshold.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the step of sensing an engine fluid pressure comprises sensing an engine coolant pressure.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein the step of sensing an engine fluid pressure comprises sensing an engine oil pressure.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein the step of generating a warning signal comprises activating a visual indicator.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein the step of generating a shutdown signal comprises reducing available engine torque.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein the step of determining a current value for an engine operating parameter comprises determining a current engine speed.
Claim 8
Dependent Claim
39 words
The method of claim 1 wherein the step of determining whether the engine fluid pressure has crossed a second threshold comprises determining the second threshold based on the first threshold for the current value of the engine operating parameter.
Claim 9
Dependent Claim
32 words
The method of claim 1 wherein the step of determining whether the engine fluid pressure has crossed a first threshold comprises determining whether the engine fluid pressure is below the first threshold.
Claim 10
Independent Claim
105 words
A system for monitoring and controlling an engine, the system comprising: an engine fluid pressure sensor for measuring an engine fluid pressure; an engine operating parameter sensor for measuring an engine operating parameter; and a controller in communication with the engine fluid pressure sensor and the engine operating parameter sensor, the microprocessor including control logic for comparing the engine fluid pressure to an associated first engine pressure threshold, comparing the engine fluid pressure to an associated second engine pressure threshold, and generating an engine warning signal when the engine fluid pressure crosses the first threshold but before the engine fluid pressure crosses the second threshold.
Claim 11
Independent Claim
105 words
A system for monitoring and controlling an engine, the system comprising: an engine fluid pressure sensor for measuring an engine fluid pressure; an engine operating parameter sensor for measuring an engine operating parameter; and a controller in communication with the engine fluid pressure sensor and the engine operating parameter sensor, the microprocessor including control logic for comparing the engine fluid pressure to an associated first engine pressure threshold, comparing the engine fluid pressure to an associated second engine pressure threshold, and generating an engine warning signal when the engine fluid pressure crosses the first threshold but before the engine fluid pressure crosses the second threshold.
Claim 12
Dependent Claim
15 words
The system of claim 9 wherein the engine fluid pressure is an engine coolant pressure.
Claim 13
Dependent Claim
15 words
The system of claim 9 wherein the engine fluid pressure is an engine oil pressure.
Claim 14
Dependent Claim
37 words
The system of claim 9 further comprising: an engine warning indicator in communication with the controller, the engine warning indicator being activated when the engine fluid pressure is below the first threshold to alert an engine operator.
Claim 15
Dependent Claim
27 words
The system of claim 9 wherein the controller further comprises control logic for generating an engine shutdown signal when the engine fluid pressure crosses the second threshold.
Claim 16
Dependent Claim
22 words
The system of claim 13, wherein the controller further comprises control logic for controlling the engine based on the engine shutdown signal.
Claim 17
Dependent Claim
147 words
A computer readable storage medium having information stored thereon representing instructions executable by an engine controller in communication with at least one pressure sensor for detecting an engine malfunction, the computer readable storage medium comprising: instructions for determining at least one fluid pressure; instructions for determining a current value for an engine operating parameter; instructions for determining a first pressure threshold value corresponding to the current value of the engine operating parameter; instructions for determining a second pressure threshold value based on the first threshold; instructions for comparing the at least one fluid pressure to the first and second thresholds to determine when the fluid pressure crosses the first and second thresholds; instructions for generating an engine warning signal indicative of the fluid pressure crossing the first pressure threshold; and instructions for generating an engine shut-down signal indicative of the fluid pressure crossing the second pressure threshold.
Claim 18
Dependent Claim
147 words
A computer readable storage medium having information stored thereon representing instructions executable by an engine controller in communication with at least one pressure sensor for detecting an engine malfunction, the computer readable storage medium comprising: instructions for determining at least one fluid pressure; instructions for determining a current value for an engine operating parameter; instructions for determining a first pressure threshold value corresponding to the current value of the engine operating parameter; instructions for determining a second pressure threshold value based on the first threshold; instructions for comparing the at least one fluid pressure to the first and second thresholds to determine when the fluid pressure crosses the first and second thresholds; instructions for generating an engine warning signal indicative of the fluid pressure crossing the first pressure threshold; and instructions for generating an engine shut-down signal indicative of the fluid pressure crossing the second pressure threshold.
Claim 19
Dependent Claim
25 words
The computer readable storage medium of claim 15 further comprising: instructions for initiating a timer when one of the first and second thresholds is crossed.
References Cited (Backward Citations)
US3602207A
Cited
US3841291A
Cited
US4019489A
Cited
US4064746A
Cited
US4136329A
Cited
US4242728A
Cited
US4189707A
Cited
US4450801A
Cited
US4475493A
Cited
US4594668A
Cited
US4556943A
Cited
US4653445A
Cited
US5070832A
Cited
US5315972A
Cited
US5477827A
Cited
US5732676A
Cited
US5664539A
Cited
US6026784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-10-17 | 2004-04-17 | 2004-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-10-17 | 2008-04-17 | 2008-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-10-17 | 2012-04-17 | 2012-10-17 | $7700.00 | Window Closed / Lapsed |