Patent US3847019A successfully refreshed from Google Patents.
US3847019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine output measuring device
Assignee: Nissan Motor Co Ltd
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Filing: 1973-05-25
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Granted: 1974-11-12
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Expires: 1993-05-25
Abstract
Abstract An electronic device for electronically measuring the instantaneous variation of an engine output or engine torque in response to an electric functional signal representing the weight of intake air introduced into the engine. The electronic device comprises an electronic computing circuit which produces an electric functional signal representing a proportional constant dependent upon the weight of intake air and the engine output, and which multiplies the functional signal representing the proportional constant by the functional signal representing the weight of intake air to thereby produce an electric engine output signal proportional to the instantaneous variation of the engine output.
Inventors
- 👤 K Masaki
- 👤 S Aono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:32
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
183 words
An electronic device for electronically measuring an output of an engine with an intake manifold having an engine speed sensor responsive to engine speed to produce an electrical engine speed analog signal representing prevailing value of engine speed, an intake manifold vacuum sensor responsive to intake manifold vacuum to produce an electrical intake manifold vacuum analog signal representing prevailing value of intake manifold vacuum, and an intake air weight measuring device for electronically measuring the weight of intake air drawn into the engine to produce an electrical functional signal representing the weight of intake air, comprising: first electronic computing means responsive to said electrical analog signals from the engine speed sensor and the intake manifold vacuum sensor to produce an electrical functional signal representing a proportional constant dependent on the weight of intake air and the output of the engine; and second electronic computing means for multiplying said electrical functional signal from said first computing means by said electrical functional signal from the intake air weight measuring device to thereby produce an electrical output signal proportional to the variation of the engine output.
Claim 2
Dependent Claim
183 words
An electronic device for electronically measuring an output of an engine with an intake manifold having an engine speed sensor responsive to engine speed to produce an electrical engine speed analog signal representing prevailing value of engine speed, an intake manifold vacuum sensor responsive to intake manifold vacuum to produce an electrical intake manifold vacuum analog signal representing prevailing value of intake manifold vacuum, and an intake air weight measuring device for electronically measuring the weight of intake air drawn into the engine to produce an electrical functional signal representing the weight of intake air, comprising: first electronic computing means responsive to said electrical analog signals from the engine speed sensor and the intake manifold vacuum sensor to produce an electrical functional signal representing a proportional constant dependent on the weight of intake air and the output of the engine; and second electronic computing means for multiplying said electrical functional signal from said first computing means by said electrical functional signal from the intake air weight measuring device to thereby produce an electrical output signal proportional to the variation of the engine output.
Claim 3
Dependent Claim
117 words
An electronic device as claimed in claim 1, in which said first electronic computing means comprises a first function generator responsive to the electrical engine speed analog signal from the engine speed sensor and an electrical intake manifold vacuum analog signal from the intake manifold vacuum sensor to produce a first electrical voltage signal representing one component of said proportional constant; a second function generator responsive to the electrical intake manifold vacuum analog signal from the intake manifold vacuum sensor to produce a second electrical voltage signal representing the other component of said proportional constant; and summing means for summing said first electrical component signal with said second electrical component signal to thereby compose said proportional constant.
Claim 4
Dependent Claim
141 words
An electrOnic device as claimed in claim 2, in which said first function generator comprises at least a diode reversely biased at a given level for allowing forward current to flow therethrough in response to the engine speed analog signal which has a level higher than said given level so that a voltage appears at the cathode of said diode; an amplifier responsive to said voltage appearing at the cathode of said diode to produce an electrical functional signal representing the higher engine speed region; summing means for summing said functional signal from said amplifier and the intake manifold vacuum analog signal to produce an electrical output signal; and another amplifier positively biased at a given level responsive to said electrical output signal from said summing means to produce said first electrical voltage signal representing one component of said proportional constant.
Claim 5
Dependent Claim
138 words
An electronic device as claimed in claim 2, in which said second function generator comprises at least a diode for allowing forward current to flow therethrough in response to the intake manifold vacuum analog signal so that a voltage appears at the cathode of said diode; a first amplifier responsive to said voltage appearing at the cathode of said diode to produce an electrical functional signal, said functional signal having an inverted polarity as opposed to that of said voltage at the cathode of said diode; summing means for summing said functional signal from said first amplifier and a given positive voltage signal to produce an electrical output signal; and a second amplifier responsive to said electrical output signal from said summing means to produce said second electrical voltage signal representing the other component of said proportional constant.
References Cited (Backward Citations)
US3191017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |