EP0211612A2
Expired / Lapsed
EP
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Method and apparatus for controlling a fluid mixture ratio
Assignee: Cool Water Coal Gasification Program
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Filing: 1986-07-30
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Granted: —
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Expires: 2006-07-30
Abstract
Abstract An apparatus and method for controlling the fluid mixture ratio comprising a means for comparing the demand for the final mixture with desired flow rates and flow rates of the components such that when the demand increases the flow rate of one of the fluid components is preferentially increased and when the demand decreases, the flow rate of the other fluid component is preferentially decreased, thus ensuring that the final ratio of the one fluid to the other fluid will either not exceed or fall below a desired ratio.
Inventors
- 👤 Eugene Hodge Broadway
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 22:11
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; G05D11/132
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
164 words
An apparatus. for controlling a fluid mixture ratio comprising: a means for generating a demand signal; a means for generating a ratio signal; a means for determining the flow rate of a first fluid establishing a first flow rate signal; a means for determining the flow rate of a second fluid establishing a second flow rate; a means for comparing said first flow rate signal to a ratio signal establishing a second fluid desired flow rate signal; a means for comparing said second fluid desired flow rate signal and said demand signal and using the output to control the flow rate of the second fluid; a means for comparing said demand signal and said second flow rate signal and comparing the output to said ratio signal establishing a first fluid desired flow rate signal; a means for controlling the flow rate of said first fluid such that said first flow rate signal is substantially the same as said first fluid desired flow rate signal.
Claim 2
Independent Claim
164 words
An apparatus. for controlling a fluid mixture ratio comprising: a means for generating a demand signal; a means for generating a ratio signal; a means for determining the flow rate of a first fluid establishing a first flow rate signal; a means for determining the flow rate of a second fluid establishing a second flow rate; a means for comparing said first flow rate signal to a ratio signal establishing a second fluid desired flow rate signal; a means for comparing said second fluid desired flow rate signal and said demand signal and using the output to control the flow rate of the second fluid; a means for comparing said demand signal and said second flow rate signal and comparing the output to said ratio signal establishing a first fluid desired flow rate signal; a means for controlling the flow rate of said first fluid such that said first flow rate signal is substantially the same as said first fluid desired flow rate signal.
Claim 3
Dependent Claim
35 words
The apparatus of claim 1 wherein the means for comparing said second fluid desired flow rate signal and said demand signal comprises an analog module capable of selecting a high signal or a low signal.
Claim 4
Dependent Claim
33 words
The apparatus of claim 1 wherein the means for comparing said demand signal and said second flow rate signal comprises an analog module capable of selecting a high signal or a low signal.
Claim 5
Independent Claim
167 words
An apparatus for controlling a fluid mixture ratio comprising: a means for generating a demand signal: a means for generating a maximum ratio signal; a means for determining the flow rate of a first fluid establishing a first flow rate signal: a means for determining the flow rate of a second fluid establishing a second flow rate; a means for comparing said first flow rate signal to the maximum ratio signal establishing a second fluid desired flow rate signal; a means for comparing said second fluid desired flow rate signal and said demand signal and using the output to control the flow rate of the second fluid; a means for comparing said demand signal and said second flow rate signal and comparing the output to said maximum ratio signal establishing a first fluid desired flow rate signal; a means for controlling the flow rate of said first fluid such that said first flow rate signal is substantially the same as said first fluid desired flow rate signal.
Claim 6
Independent Claim
167 words
An apparatus for controlling a fluid mixture ratio comprising: a means for generating a demand signal: a means for generating a maximum ratio signal; a means for determining the flow rate of a first fluid establishing a first flow rate signal: a means for determining the flow rate of a second fluid establishing a second flow rate; a means for comparing said first flow rate signal to the maximum ratio signal establishing a second fluid desired flow rate signal; a means for comparing said second fluid desired flow rate signal and said demand signal and using the output to control the flow rate of the second fluid; a means for comparing said demand signal and said second flow rate signal and comparing the output to said maximum ratio signal establishing a first fluid desired flow rate signal; a means for controlling the flow rate of said first fluid such that said first flow rate signal is substantially the same as said first fluid desired flow rate signal.
Claim 7
Dependent Claim
34 words
The apparatus of claim 4 wherein the means for comparing said second fluid desired flow rate signal and said demand signal comprises a high signal selector analog module capable of selecting a high signal.
Claim 8
Dependent Claim
32 words
The apparatus of claim 4 wherein the means for comparing said demand signal and said second flow rate signal comprises a low signal selector analog module capable of selecting a low signal.
Claim 9
Dependent Claim
43 words
The apparatus of claim 4 wherein the means for comparing said first flow rate signal to the maximum ratio signal establishing a second fluid desired flow rate signal comprises an analog module capable of outputting the quotient of at least two input signals.
Claim 10
Dependent Claim
61 words
The apparatus of claim 4 wherein the means for comparing said demand signal and said second flow rate signal and comparing the output to said maximum ratio signal establishing a first fluid desired flow rate signal comprises a low signal selector analog module capable of selecting a low signal and an analog module capable of outputting the product of two inputs.
Claim 11
Independent Claim
166 words
An apparatus for controlling a fluid mixture ratio comprising: a means for generating a demand signal; a means for generating a minimum ratio signal; a means for determining the flow rate of a first fluid establishing a first flow rate signal; a means for determining the flow rate of a second fluid establishing a second flow rate; a means for comparing said first flow rate signal to said minimum ratio signal establishing a second fluid desired flow rate signal; a means for comparing said second fluid desired flow rate signal and said demand signal and using the output to control the flow rate of the second fluid; a means for comparing said demand signal and said second flow rate signal and comparing the output to said minimum ratio signal establishing a first fluid desired flow rate signal; a means for controlling the flow rate of said first fluid such that first flow rate signal is substantially the same as said first fluid desired flow rate signal.
Claim 12
Independent Claim
166 words
An apparatus for controlling a fluid mixture ratio comprising: a means for generating a demand signal; a means for generating a minimum ratio signal; a means for determining the flow rate of a first fluid establishing a first flow rate signal; a means for determining the flow rate of a second fluid establishing a second flow rate; a means for comparing said first flow rate signal to said minimum ratio signal establishing a second fluid desired flow rate signal; a means for comparing said second fluid desired flow rate signal and said demand signal and using the output to control the flow rate of the second fluid; a means for comparing said demand signal and said second flow rate signal and comparing the output to said minimum ratio signal establishing a first fluid desired flow rate signal; a means for controlling the flow rate of said first fluid such that first flow rate signal is substantially the same as said first fluid desired flow rate signal.
Claim 13
Dependent Claim
34 words
The apparatus of claim 9 wherein the means for comparing said second fluid desired flow rate signal and said demand signal comprises a low signal selector analog module capable of selecting a low signal.
Claim 14
Dependent Claim
32 words
The apparatus of claim 9 wherein the means for comparing said demand signal and said second flow rate signal comprises a high signal selector analog module capable of selecting a high signal.
Claim 15
Dependent Claim
43 words
The apparatus of claim 9 wherein the means for comparing said first flow rate signal to said minimum ratio signal establishing a second fluid desired flow rate signal comprises an analog module capable of outputting the quotient of at least two input signals.
Claim 16
Dependent Claim
61 words
The apparatus of claim 9 wherein the means for comparing said demand signal and said second flow rate signal and comparing the output to said minimum ratio signal establishing a first fluid desired flow rate signal comprises a high signal selector analog module capable of selecting a high signal and an analog module capable of outputting the product of two inputs.
Claim 17
Independent Claim
239 words
An apparatus for controlling a fluid mixture ratio comprising: a first control valve; a second control valve; a first high/low signal selector; a second high/low signal selector; a first flow meter; a second flow meter; a divider; and, a multiplier; wherein said output from said first flow meter is inputted to said divider and said first control valve; a first input means for inputting a ratio to said divider and said multiplier; the output of said divider is inputted to said first high/low signal selector; a second input means for inputting the demand for said second fluid to said first high/low signal selector and said second high/low signal selector; the output of said first high/low signal selector is inputted to said second control valve; the output of said second flow meter is inputted to said second control valve and said second high/low signal selector; said second control valve being capable of adjusting the flow of the second fluid such that the output of said second flow meter is substantially the same as the output of said first high/low signal selector; the output of said second high/low signal selector is inputted to said multiplier; and the output of said multiplier is inputted to said first control valve; said first control valve being capable of adjusting the flow of the first fluid such that the output of said first flow meter is substantially the same as the output of said multiplier.
Claim 18
Independent Claim
239 words
An apparatus for controlling a fluid mixture ratio comprising: a first control valve; a second control valve; a first high/low signal selector; a second high/low signal selector; a first flow meter; a second flow meter; a divider; and, a multiplier; wherein said output from said first flow meter is inputted to said divider and said first control valve; a first input means for inputting a ratio to said divider and said multiplier; the output of said divider is inputted to said first high/low signal selector; a second input means for inputting the demand for said second fluid to said first high/low signal selector and said second high/low signal selector; the output of said first high/low signal selector is inputted to said second control valve; the output of said second flow meter is inputted to said second control valve and said second high/low signal selector; said second control valve being capable of adjusting the flow of the second fluid such that the output of said second flow meter is substantially the same as the output of said first high/low signal selector; the output of said second high/low signal selector is inputted to said multiplier; and the output of said multiplier is inputted to said first control valve; said first control valve being capable of adjusting the flow of the first fluid such that the output of said first flow meter is substantially the same as the output of said multiplier.
Claim 19
Dependent Claim
20 words
The apparatus of claim 14 wherein said multiplier comprises an xy/z analog module with the z input set to unity.
Claim 20
Dependent Claim
20 words
The apparatus of claim 14 wherein said divider comprises an xy/z analog module with the y input set to unity.
Claim 21
Dependent Claim
27 words
The apparatus of claim 14 wherein said first high/low selector is set for high select and said second hig h/ low selector is set for low select.
Claim 22
Dependent Claim
25 words
The apparatus of claim 14 wherein said first high/low selector is set for low select and said second high/low selector is set for high select.
Claim 23
Independent Claim
142 words
A method for controlling a fluid mixture ratio comprising: generating a demand signal; generating a ratio signal; generating a first flow rate signal representative of the flow rate of a first fluid; generating a second flow rate signal representative of the flow rate of a second fluid; comparing the second flow rate signal to the ratio signal establishing second fluid desired flow rate signal; comparing the second fluid desired flow rate signal to the demand signal and using the output to control the flow rate of the second fluid; comparing the demand signal and the second flow rate signal and comparing the output to the ratio signal establishing a first fluid desired flow rate signal; controlling the flow rate of the first fluid such that the first flow rate signal is substantially the same as the first fluid desired flow rate signal.
Claim 24
Independent Claim
142 words
A method for controlling a fluid mixture ratio comprising: generating a demand signal; generating a ratio signal; generating a first flow rate signal representative of the flow rate of a first fluid; generating a second flow rate signal representative of the flow rate of a second fluid; comparing the second flow rate signal to the ratio signal establishing second fluid desired flow rate signal; comparing the second fluid desired flow rate signal to the demand signal and using the output to control the flow rate of the second fluid; comparing the demand signal and the second flow rate signal and comparing the output to the ratio signal establishing a first fluid desired flow rate signal; controlling the flow rate of the first fluid such that the first flow rate signal is substantially the same as the first fluid desired flow rate signal.
Claim 25
Independent Claim
170 words
A method for controlling a fluid mixture ratio comprising: generating a demand signal; generating a maximum ratio signal; generating a first flow rate signal representative of the flow rate of a first fluid; generating a second flow rate signal representative of the flow rate of a second fluid; comparing the first flow rate signal to the maximum ratio signal establishing a second fluid desired flow rate signal; determining the greater of the second fluid desired flow rate signal and the demand signal establishing a high signal; controlling the flow rate of the second fluid such that the second flow rate signal is substantially the same as the high signal; determining the lesser of the demand signal and the second flow rate signal establishing a low signal; comparing the low signal to the maximum ratio signal establishing a first fluid desired flow rate signal; controlling the flow rate of the first fluid such that the first flow rate signal is substantially the same as the first fluid desired flow rate signal.
Claim 26
Independent Claim
170 words
A method for controlling a fluid mixture ratio comprising: generating a demand signal; generating a maximum ratio signal; generating a first flow rate signal representative of the flow rate of a first fluid; generating a second flow rate signal representative of the flow rate of a second fluid; comparing the first flow rate signal to the maximum ratio signal establishing a second fluid desired flow rate signal; determining the greater of the second fluid desired flow rate signal and the demand signal establishing a high signal; controlling the flow rate of the second fluid such that the second flow rate signal is substantially the same as the high signal; determining the lesser of the demand signal and the second flow rate signal establishing a low signal; comparing the low signal to the maximum ratio signal establishing a first fluid desired flow rate signal; controlling the flow rate of the first fluid such that the first flow rate signal is substantially the same as the first fluid desired flow rate signal.
Claim 27
Independent Claim
170 words
A method for controlling a fluid mixture ratio comprising: generating a demand signal; generating a minimum ratio signal; generating a first flow rate signal representative of the flow rate of a first fluid; generating a second flow rate signal representative of the flow rate of a second fluid; comparing the first flow rate signal to the minimum ratio signal establishing a second fluid desired flow rate signal; determining the lesser of the second fluid desired flow rate signal and the demand signal establishing a high signal; controlling the flow rate of the second fluid such that the second flow rate signal is substantially the same as the low signal; determining the lesser of the demand signal and the second flow rate signal establishing a high signal; comparing the high signal to the minimum ratio signal establishing a first fluid desired flow rate signal; controlling the flow rate of the first fluid such that the first flow rate signal is substantially the same as the first fluid desired flow rate signal.
Claim 28
Independent Claim
170 words
A method for controlling a fluid mixture ratio comprising: generating a demand signal; generating a minimum ratio signal; generating a first flow rate signal representative of the flow rate of a first fluid; generating a second flow rate signal representative of the flow rate of a second fluid; comparing the first flow rate signal to the minimum ratio signal establishing a second fluid desired flow rate signal; determining the lesser of the second fluid desired flow rate signal and the demand signal establishing a high signal; controlling the flow rate of the second fluid such that the second flow rate signal is substantially the same as the low signal; determining the lesser of the demand signal and the second flow rate signal establishing a high signal; comparing the high signal to the minimum ratio signal establishing a first fluid desired flow rate signal; controlling the flow rate of the first fluid such that the first flow rate signal is substantially the same as the first fluid desired flow rate signal.
References Cited (Backward Citations)
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