US3286164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Systems for detection and automatic registration of preignition ionization potentials in internal combustion engines
Assignee: Mobil Oil AS
•
Filing: 1962-05-18
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Granted: 1966-11-15
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Expires: 1982-05-18
Abstract
No abstract record available.
Inventors
- 👤 Huff Charles B De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:44
CPC Classifications
G; G01; G01L; G01L23/00; G01L23/22; G01L23/221; G01L23/225
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A SYSTEM FOR CHECKING THE PREIGNITION CHARACTERISTICS OF FUELS FOR AN INTERNAL COMBINATION ENGINE COMPRISING A FIRING PLUG THEREFOR HAVING A SINGLE INSULATED ELECTRODE UTILIZED BOTH FOR PRODUCING NORMAL IGNITION AND AS A DETECTOR OF PREIGNITION IONIZATION, SAID ELECTRODE BEING SEALED THEREIN AND EXTENDING INTO THE COMBUSTION CHAMBER OF SAID ENGINE, A HIGH-VOLTAGE SOURCE CONNECTED TO SAID ELECTRODE FOR PRODUCING SAID NORMAL IGNITION, VOLTAGE-RESPONSIVE MEANS CONNECTED TO AN EXTERNAL TERMINAL OF SAID ELECTRODE OF SAID FIRING PLUG, MEANS FOR PRODUCING GATING PULSES TIMED TO COINCIDE WITH THE TERMINAL PORTIONS OF SUCCESSIVE FUEL COMPRESSION PERIODS OF SAID ENGINE DURING WHICH PERMATURE COMBUSTION MAY OCCUR, AND MEANS FOR APPLYING SAID PULSES TO SAID VOLTAGE-RESPONSIVE MEANS TO DE-SENSITIZE IT EXCEPT DURING SAID PERIODS FOR RESPONSE THEREOF ONLY TO PREIGNITION IONIZATION VOLTAGES APPEARING AT SAID ELECTRODE.
Claim 2
Independent Claim
132 words
A SYSTEM FOR CHECKING THE PREIGNITION CHARACTERISTICS OF FUELS FOR AN INTERNAL COMBINATION ENGINE COMPRISING A FIRING PLUG THEREFOR HAVING A SINGLE INSULATED ELECTRODE UTILIZED BOTH FOR PRODUCING NORMAL IGNITION AND AS A DETECTOR OF PREIGNITION IONIZATION, SAID ELECTRODE BEING SEALED THEREIN AND EXTENDING INTO THE COMBUSTION CHAMBER OF SAID ENGINE, A HIGH-VOLTAGE SOURCE CONNECTED TO SAID ELECTRODE FOR PRODUCING SAID NORMAL IGNITION, VOLTAGE-RESPONSIVE MEANS CONNECTED TO AN EXTERNAL TERMINAL OF SAID ELECTRODE OF SAID FIRING PLUG, MEANS FOR PRODUCING GATING PULSES TIMED TO COINCIDE WITH THE TERMINAL PORTIONS OF SUCCESSIVE FUEL COMPRESSION PERIODS OF SAID ENGINE DURING WHICH PERMATURE COMBUSTION MAY OCCUR, AND MEANS FOR APPLYING SAID PULSES TO SAID VOLTAGE-RESPONSIVE MEANS TO DE-SENSITIZE IT EXCEPT DURING SAID PERIODS FOR RESPONSE THEREOF ONLY TO PREIGNITION IONIZATION VOLTAGES APPEARING AT SAID ELECTRODE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |