US5317267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug voltage probe for use with an internal combustion engine
Assignee: Niterra Co Ltd
•
Filing: 1992-04-09
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Granted: 1994-05-31
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Expires: 2012-04-09
Abstract
Abstract A spark plug voltage probe detects a voltage applied to a spark plug installed in an internal combustion engine so as to analyze a burning condition in the internal combustion engine on the basis of the voltage applied to the spark plug. A rubber collar (74) is provided to surround a rubber cap (7) which is secured to a high tension terminal (71a) of the spark plug (71) so as form a static capacity between the high tension terminal (71a) and the rubber collar (74). An electrical conductor (73) is provided between the rubber cap (7) and the rubber collar (74) and is electrically connected to a microcomputer by way of an output cable (64).
Inventors
- 👤 Shigeru Miyata
- 👤 Hideji Yoshida
- 👤 Yoshihiro Matsubara
- 👤 Yasuo Ito
- 👤 Takashi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:40
CPC Classifications
F; F02; F02P; F02P11/00; F02P11/06; F02P17/00; F02P17/12; F02P2017/006; F02P2017/123; F02P2017/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A spark plug voltage probe which detects a voltage applied to a spark plug installed in an internal combustion engine so as to analyze a burning condition in the internal combustion engine on the basis of the voltage applied to the spark plug, the spark plug voltage probe comprising: an insulator base (101) secured to the top of the internal combustion engine, an upper surface (111) of the insulator base (101) having a groove (112) in which a spark plug cable (105) is located and a lower surface (113) of the insulator base (101) having a cavity (114) as an accommodation space (115) in which electrical circuits are placed in a package substrate (103) by means of a resin filler (104); and an electrode plate (102) embedded in the insulator base (101) along the groove (112) and electrically connected to the electrical circuits by way of a lead wire (122).
Claim 2
Dependent Claim
150 words
A spark plug voltage probe which detects a voltage applied to a spark plug installed in an internal combustion engine so as to analyze a burning condition in the internal combustion engine on the basis of the voltage applied to the spark plug, the spark plug voltage probe comprising: an insulator base (101) secured to the top of the internal combustion engine, an upper surface (111) of the insulator base (101) having a groove (112) in which a spark plug cable (105) is located and a lower surface (113) of the insulator base (101) having a cavity (114) as an accommodation space (115) in which electrical circuits are placed in a package substrate (103) by means of a resin filler (104); and an electrode plate (102) embedded in the insulator base (101) along the groove (112) and electrically connected to the electrical circuits by way of a lead wire (122).
References Cited (Backward Citations)
GB557088A
Cited
US2408045A
Cited
US3711767A
Cited
DE2356440A1
Cited
US4041373A
Cited
JPS52118135A
Cited
US4052665A
Cited
US4349782A
Cited
DE3306431A1
Cited
US4783991A
Cited
EP0277468A1
Cited
US5001432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |