Patent US3750635A successfully refreshed from Google Patents.
US3750635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic adjustment for fuel rack stop
Assignee: Caterpillar Inc
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Filing: 1971-06-14
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Granted: 1973-08-07
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Expires: 1991-06-14
Abstract
Abstract Control means for adjusting the fuel setting of an internal combustion engine comprises means for measuring the heat value of a fuel by detecting differences in the light transmission characteristics between different fuels, and initiating a signal in response thereto. The signal activates control means for altering the fuel setting in accordance with such heat value.
Inventors
- 👤 J Hoffman
- 👤 G Whitehurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:16
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/44; F02M59/447; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P5/152; F02P5/1527; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
Control means for controlling the amount of fuel supplied to an internal combustion engine in accordance with the heat value of said fuel, said control means comprising: means for measuring said heat value of said fuel, said measuring means including: a. a source of light energy; b. means for directing light from said source through at least a sample of fuel to be supplied to said engine; c. means responsive to said liGht transmitted through said fuel to initiate a signal; and, means responsive to said signal to energize adjusting means to adjust the amount of fuel supplied to said engine.
Claim 2
Dependent Claim
101 words
Control means for controlling the amount of fuel supplied to an internal combustion engine in accordance with the heat value of said fuel, said control means comprising: means for measuring said heat value of said fuel, said measuring means including: a. a source of light energy; b. means for directing light from said source through at least a sample of fuel to be supplied to said engine; c. means responsive to said liGht transmitted through said fuel to initiate a signal; and, means responsive to said signal to energize adjusting means to adjust the amount of fuel supplied to said engine.
Claim 3
Dependent Claim
14 words
The system of claim 1 wherein said light responsive means comprises a photosensitive cell.
Claim 4
Dependent Claim
56 words
The system of claim 1 wherein said light responsive means comprises a pair of photosensitive cells; each of said cells are operative to alter one branch of an electrical bridge circuit in response to said light, and said bridge circuit is operatively connected to control means for energizing stop positioning means for a fuel control rack.
Claim 5
Dependent Claim
13 words
The system of claim 3 wherein said stop positioning means comprises a solenoid.
Claim 6
Dependent Claim
16 words
The system of claim 3 wherein each of said photosensitive cells has a different spectral response.
Claim 7
Dependent Claim
25 words
The system of claim 3 comprising a filter positioned between one of said cells and said light source to alter the response of said cell.
Claim 8
Dependent Claim
118 words
A fuel control system for controlling the amount of fuel supplied to an internal combustion engine, said control system comprising: a source of fuel; means for supplying a quantity of said fuel to an engine; means for measuring the heat value of said fuel, said measuring means comprising: a. a source of light energy; b. means for directing light from said source through at least a sample of said fuel supplied to said engine; and, c. means comprising a photosensitive cell responsive to said light transmitted through said fuel to initiate a signal proportional to said light; and, means responsive to said signal to energize adjusting means to adjust the amount of said fuel supplied to said engine.
Claim 9
Dependent Claim
118 words
A fuel control system for controlling the amount of fuel supplied to an internal combustion engine, said control system comprising: a source of fuel; means for supplying a quantity of said fuel to an engine; means for measuring the heat value of said fuel, said measuring means comprising: a. a source of light energy; b. means for directing light from said source through at least a sample of said fuel supplied to said engine; and, c. means comprising a photosensitive cell responsive to said light transmitted through said fuel to initiate a signal proportional to said light; and, means responsive to said signal to energize adjusting means to adjust the amount of said fuel supplied to said engine.
Claim 10
Dependent Claim
64 words
The fuel control system of claim 7 wherein said light responsive means comprises a pair of photosensitive cells, each having a different spectral response; each of said cells are operative to alter one branch of an electrical bridge circuit in response to said light; and said bridge circuit is operatively connected to control means for energizing stop positioning means for a fuel control rack.
Claim 11
Dependent Claim
15 words
The fuel control system of claim 8 wherein said stop positioning means comprises a solenoid.
Claim 12
Dependent Claim
27 words
The fuel control system of claim 9 comprising a filter positioned between one of said cells and said light source to alter the response of said cell.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |