US4769995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-fuel ratio controller for a turbocharged internal combustion engine
Assignee: Cameron International Corp
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Filing: 1986-12-23
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Granted: 1988-09-13
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Expires: 2006-12-23
Abstract
Abstract An air-fuel ratio controller for a gaseous-fueled, turbocharged engine having an air manifold, a gas manifold, and a turbine inlet is disclosed herein. The controller includes means for controlling air manifold pressure and means for controlling turbine inlet temperature. The means for controlling air manifold pressure includes means for providing an air manifold pressure set point signal based on gas manifold pressure and engine RPM's and at least one constant input. The means for controlling turbine inlet temperature includes means for modulating the slope of the set point signal for the air manifold pressure controller.
Inventors
- 👤 J. Vincent Serve
- 👤 David W. Eckard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:34
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1446; F02B; F02B37/00; F02B37/12; F02B37/18; F02D19/00; F02D19/02; F02D19/021; F02D19/023; F02D41/0002; F02D41/0007; F02B29/00; F02B29/04; F02B29/0406; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
An air-fuel ratio controller for a gaseous-fueled, turbocharged engine having an air manifold, a gas manifold, and a turbine inlet, said controller comprising; means for controlling air manifold pressure, comprising means for providing an air manifold pressure set point signal based on gas manifold pressure and engine RPM's and at least one constant input; and means for controlling turbine inlet temperature, said means comprising means for modulating the slope of the set point signal for the air manifold pressure controller.
Claim 2
Dependent Claim
80 words
An air-fuel ratio controller for a gaseous-fueled, turbocharged engine having an air manifold, a gas manifold, and a turbine inlet, said controller comprising; means for controlling air manifold pressure, comprising means for providing an air manifold pressure set point signal based on gas manifold pressure and engine RPM's and at least one constant input; and means for controlling turbine inlet temperature, said means comprising means for modulating the slope of the set point signal for the air manifold pressure controller.
Claim 3
Dependent Claim
11 words
The controller of claim 1 further comprising controller power supplying means.
Claim 4
Dependent Claim
16 words
The controller of claim 2 wherein said controller power supplying means comprises engine mountable magnetic pickups.
Claim 5
Dependent Claim
30 words
The controller of claim 1 further comprising means for preventing operation of said means for controlling turbine inlet temperature until turbine inlet temperature is at or above a predetermined temperature.
Claim 6
Dependent Claim
59 words
The controller of claim 1 wherein said means for controlling turbine inlet temperature further comprises means for compensating turbine inlet temperature by air manifold pressure and ambient temperature and wherein said means for modulating the slope of the set point signal uses a linear function of air manifold pressure modified by revolutions per minute, pressure bias, and temperature bias.
Claim 7
Dependent Claim
145 words
An air-fuel ratio control apparatus for a gaseous fueled, turbocharged engine having an exhaust manifold, a turbine inlet, a waste gate valve position between the exhaust manifold and the turbine inlet, an air manifold, a gas manifold, and means for controlling air manifold pressure as a function of gas manifold pressure in accordance with predetermined inputs, said controller comprising: means for sensing temperature at the turbine inlet and producing a signal indicative thereof; means for determining desired turbine inlet temperature based on selected variables including air manifold pressure and producing a signal indicative thereof; means for regulating air manifold pressure including set point setting means; means for comparing signals indicative of sensed and desired turbine inlet temperature and controlling the means for regulating air manifold pressure and responding to that comparison so as to effectively urge actual turbine inlet temperature toward desired turbine inlet temperature.
Claim 8
Dependent Claim
145 words
An air-fuel ratio control apparatus for a gaseous fueled, turbocharged engine having an exhaust manifold, a turbine inlet, a waste gate valve position between the exhaust manifold and the turbine inlet, an air manifold, a gas manifold, and means for controlling air manifold pressure as a function of gas manifold pressure in accordance with predetermined inputs, said controller comprising: means for sensing temperature at the turbine inlet and producing a signal indicative thereof; means for determining desired turbine inlet temperature based on selected variables including air manifold pressure and producing a signal indicative thereof; means for regulating air manifold pressure including set point setting means; means for comparing signals indicative of sensed and desired turbine inlet temperature and controlling the means for regulating air manifold pressure and responding to that comparison so as to effectively urge actual turbine inlet temperature toward desired turbine inlet temperature.
Claim 9
Dependent Claim
17 words
The apparatus of claim 6 wherein said means for regulating air manifold pressure comprises a wastegate valve.
References Cited (Backward Citations)
US4467608A
Cited
US4496286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |