US4418566A
Expired / Lapsed
US
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Gas analyzing techniques
Assignee: Snap On Inc
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Filing: 1982-01-25
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Granted: 1983-12-06
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Expires: 2002-01-25
Abstract
Abstract Gas analyzing techniques for monitoring the amount of oxygen in the exhaust of motor vehicles. An oxygen sensor produces a sensor signal having a sensor value proportional to the partial pressure of the oxygen produced by the motor vehicle. Processing circuitry generates a resulting signal proportional to the sum of the sensor value, another value proportional to the first derivative of the sensor value and a third value proportional to the second derivative of the sensor value. The resulting signal can be used to predict the final sensor value at a point in time earlier than would be otherwise possible.
Inventors
- 👤 James E. Beck
- 👤 Arvind M. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:59
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1473; F02D41/1474; G; G01; G01M; G01M15/00; G01M15/04; G01M15/10; G01M15/102; G01M15/104; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/406; G01N27/4065; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0062; G01N33/0067; F02D41/1444; F02D41/1454; F02D41/1456
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
174 words
In a system for analyzing the concentration of a predetermined gas by use of a sensor means for generating a sensor signal having a sensor value proportional to the partial pressure of the predetermined gas after a predetermined time period, improved apparatus for anticipating the amount of the concentration before the time period expires comprising: signal processing means for generating a resulting signal proportional to the sum of the sensor value, another value proportional to the first derivative of the sensor value and a third value proportional to the second derivative of the sensor value, the signal processing means further comprising filter means for attenuating at a first rate signals having a frequency below a first cut off frequency, for attenuating at a second rate signals having a frequency above a second cut off frequency and for attenuating at a third rate signals having a frequency above a third cut off frequency greater than the second cut off frequency, and display means for displaying information related to the concentration based on the resulting signal.
Claim 2
Dependent Claim
174 words
In a system for analyzing the concentration of a predetermined gas by use of a sensor means for generating a sensor signal having a sensor value proportional to the partial pressure of the predetermined gas after a predetermined time period, improved apparatus for anticipating the amount of the concentration before the time period expires comprising: signal processing means for generating a resulting signal proportional to the sum of the sensor value, another value proportional to the first derivative of the sensor value and a third value proportional to the second derivative of the sensor value, the signal processing means further comprising filter means for attenuating at a first rate signals having a frequency below a first cut off frequency, for attenuating at a second rate signals having a frequency above a second cut off frequency and for attenuating at a third rate signals having a frequency above a third cut off frequency greater than the second cut off frequency, and display means for displaying information related to the concentration based on the resulting signal.
Claim 3
Dependent Claim
282 words
In a system for analyzing the concentration of a predetermined gas by use of a sensor means for generating a sensor signal having a sensor value proportional to the partial pressure of the predetermined gas after a predetermined time period, improved apparatus for anticipating the amount of the concentration before the time period expires comprising: signal processing means for generating a resulting signal proportional to the sum of the sensor value, another value proportional to the first derivative of the sensor value and a third value proportional to the second derivative of the sensor value, said signal processing means comprising: (a) first differentiating means for generating a first rate signal proportional to the rate of change of the sensor signal; (b) first summing means for generating a first summed signal proportional to the sum of at least a portion of the sensor signal and at least a portion of the first rate signal; (c) second differentiating means for generating a second rate signal proportional to the rate of change of the first summed signal; (d) second summing means for generating said resulting signal proportional to the sum of at least a portion of the first summed signal and at least a portion of the second rate signal; and (e) filter means for attenuating at a first rate signals having a frequency below a first cut off frequency, for attenuating at a second rate signals having a frequency above a second cut off frequency and for attenuating at a third rate signals having a frequency above a third cut off frequency greater than the second cut off frequency; and display means for displaying information related to the concentration based on the resulting signal.
Claim 4
Dependent Claim
282 words
In a system for analyzing the concentration of a predetermined gas by use of a sensor means for generating a sensor signal having a sensor value proportional to the partial pressure of the predetermined gas after a predetermined time period, improved apparatus for anticipating the amount of the concentration before the time period expires comprising: signal processing means for generating a resulting signal proportional to the sum of the sensor value, another value proportional to the first derivative of the sensor value and a third value proportional to the second derivative of the sensor value, said signal processing means comprising: (a) first differentiating means for generating a first rate signal proportional to the rate of change of the sensor signal; (b) first summing means for generating a first summed signal proportional to the sum of at least a portion of the sensor signal and at least a portion of the first rate signal; (c) second differentiating means for generating a second rate signal proportional to the rate of change of the first summed signal; (d) second summing means for generating said resulting signal proportional to the sum of at least a portion of the first summed signal and at least a portion of the second rate signal; and (e) filter means for attenuating at a first rate signals having a frequency below a first cut off frequency, for attenuating at a second rate signals having a frequency above a second cut off frequency and for attenuating at a third rate signals having a frequency above a third cut off frequency greater than the second cut off frequency; and display means for displaying information related to the concentration based on the resulting signal.
Claim 5
Dependent Claim
14 words
Apparatus, as claimed in claim 1 or 2, wherein the predetermined gas is oxygen.
Claim 6
Dependent Claim
166 words
In a process for analyzing the concentration of a predetermined gas by use of a sensor means for generating a sensor signal having a sensor value proportional to the partial pressure of the predetermined gas after a predetermined time period, an improved method for anticipating the amount of the concentration before the time period expires comprising the steps of: generating a resulting signal proportional to the sum of the sensor value, another value proportional to the first derivative of the sensor value and a third value proportional to the second derivative of the sensor value, the step of generating further comprising attenuating at a first rate signals having a frequency below a first cut off frequency, attenuating at a second rate signals having a frequency above a second cut off frequency and attenuating at a third rate signals having a frequency above a third cut off frequency greater than the second cut off frequency; and displaying information related to the concentration based on the resulting signal.
Claim 7
Dependent Claim
166 words
In a process for analyzing the concentration of a predetermined gas by use of a sensor means for generating a sensor signal having a sensor value proportional to the partial pressure of the predetermined gas after a predetermined time period, an improved method for anticipating the amount of the concentration before the time period expires comprising the steps of: generating a resulting signal proportional to the sum of the sensor value, another value proportional to the first derivative of the sensor value and a third value proportional to the second derivative of the sensor value, the step of generating further comprising attenuating at a first rate signals having a frequency below a first cut off frequency, attenuating at a second rate signals having a frequency above a second cut off frequency and attenuating at a third rate signals having a frequency above a third cut off frequency greater than the second cut off frequency; and displaying information related to the concentration based on the resulting signal.
Claim 8
Dependent Claim
259 words
In a process of analyzing the concentration of a predetermined gas by use of a sensor means for generating a sensor signal having a sensor value proportional to the partial pressure of the predetermined gas after a predetermined time period, an improved method for anticipating the amount of the concentration before the time period expires comprising the steps of: generating a resulting signal proportional to the sum of the sensor value, another value proportional to the first derivative of the sensor value and a third value proportional to the second derivative of the sensor value, said step of generating comprising: (a) generating a first rate signal proportional to the rate of change of the sensor signal; (b) generating a first summed signal proportional to the sum of at least a portion of the sensor signal and at least a portion of the first rate signal; (c) generating a second rate signal proportional to the rate of change of the first summed signal; (d) generating said resulting signal proportional to the sum of at least a portion of the first summed signal and at least a portion of the second rate signal; (e) attenuating at a first rate signals having a frequency below a first cut off frequency; (f) attenuating at a second rate signals having a frequency above a second cut off frequency; and (g) attenuating at a third rate signals having a frequency above a third cut off frequency greater than the second cut off frequency; and displaying information related to the concentration based on the resulting signal.
Claim 9
Dependent Claim
259 words
In a process of analyzing the concentration of a predetermined gas by use of a sensor means for generating a sensor signal having a sensor value proportional to the partial pressure of the predetermined gas after a predetermined time period, an improved method for anticipating the amount of the concentration before the time period expires comprising the steps of: generating a resulting signal proportional to the sum of the sensor value, another value proportional to the first derivative of the sensor value and a third value proportional to the second derivative of the sensor value, said step of generating comprising: (a) generating a first rate signal proportional to the rate of change of the sensor signal; (b) generating a first summed signal proportional to the sum of at least a portion of the sensor signal and at least a portion of the first rate signal; (c) generating a second rate signal proportional to the rate of change of the first summed signal; (d) generating said resulting signal proportional to the sum of at least a portion of the first summed signal and at least a portion of the second rate signal; (e) attenuating at a first rate signals having a frequency below a first cut off frequency; (f) attenuating at a second rate signals having a frequency above a second cut off frequency; and (g) attenuating at a third rate signals having a frequency above a third cut off frequency greater than the second cut off frequency; and displaying information related to the concentration based on the resulting signal.
Claim 10
Dependent Claim
15 words
A process, as claimed in claim 4 or 5, wherein the predetermined gas is oxygen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |