US5349930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High tension cord cover with misfire detecting capacitor for internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1993-04-29
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Granted: 1994-09-27
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Expires: 2013-04-29
Abstract
Abstract A high tension cord cover disposed at an engine cylinder head for covering a groove in which high tension cords pass through for supplying an ignition voltage current to a spark plug of the engine. The cover is made of an insulation material and having a cord retaining section at the bottom surface facing the groove for retaining the cords in parallel with each other. A plate like conductor is embedded in the cover keeping a predetermined distance therefrom and sandwiching a portion of the insulation cover, whereby a capacitor, which constitutes a capacitive divider in cooperation with a second capacitor for detecting misfire through the ignition voltage, is formed between the conductive cores of the high tension cords and the plate like conductor. The conductor can be electrically shielded. A second member made of an insulation material can be provided in the groove underneath the cover for retaining the cords such that the conductor embedded in the cover is kept the predetermined distance from the cords.
Inventors
- 👤 Shigeru Maruyama
- 👤 Yuichi Shimasaki
- 👤 Masaki Kanehiro
- 👤 Takuji Ishioka
- 👤 Shigeki Baba
- 👤 Takashi Hisaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:21
CPC Classifications
G; G01; G01R; G01R15/00; G01R15/14; G01R15/16; F; F02; F02P; F02P17/00; F02P17/12; F02B; F02B2275/00; F02B2275/18; F02F; F02F7/00; F02F7/006; F02P2017/006; F02P2017/125
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
84 words
A high tension cord cover for covering at least one high tension cord having a conductive core therein carrying an ignition voltage current for an internal combustion engine, comprising: a member made of an insulation material for holding the at least one high tension cord; and a second conductor embedded in the member keeping a predetermined distance from the high tension cord and sandwiching a portion of the member between said high tension cord and said second conductor such that a capacitor is formed.
Claim 2
Dependent Claim
84 words
A high tension cord cover for covering at least one high tension cord having a conductive core therein carrying an ignition voltage current for an internal combustion engine, comprising: a member made of an insulation material for holding the at least one high tension cord; and a second conductor embedded in the member keeping a predetermined distance from the high tension cord and sandwiching a portion of the member between said high tension cord and said second conductor such that a capacitor is formed.
Claim 3
Dependent Claim
48 words
A cover according to claim 1, wherein the member is a cover for covering a groove formed at a portion of the engine for receiving the at least one high tension cord and the cover is formed with a cord retaining section at a surface facing the groove.
Claim 4
Dependent Claim
17 words
A cover according to claim 2, wherein the portion comprises a cylinder head cover of the engine.
Claim 5
Dependent Claim
33 words
A cover according to claim 2, wherein the cord retaining section formed at the cover is a recess having a semicircular cross section and the high tension cord is placed in the recess.
Claim 6
Dependent Claim
27 words
A cover according to claim 2, wherein the second conductor is embedded at a location between the surface facing the groove and a second surface opposite thereto.
Claim 7
Dependent Claim
43 words
A cover according to claim 2 , wherein the cord retaining section formed at the cover comprises recesses configured side by side and each having a semicircular cross section and a plurality of the high tension cords are placed in the individual recesses.
Claim 8
Dependent Claim
28 words
A cover according to claim 6, wherein the second conductor is embedded at a location between the surface formed with the recesses and a second surface opposite thereto.
Claim 9
Dependent Claim
26 words
A cover according to claim 7, wherein the second conductor are embedded at the location keeping the predetermined distance from each of the high tension cords.
Claim 10
Dependent Claim
15 words
A cover according to claim 8, wherein the second conductor has a plate like shape.
Claim 11
Dependent Claim
23 words
A cover according to claim 9, wherein the width of the second conductor is not less than the total width of the recesses.
Claim 12
Dependent Claim
15 words
A cover according to claim 6, wherein a cut is formed between the adjacent recesses.
Claim 13
Dependent Claim
13 words
A cover according to claim 1, wherein the second conductor is electrically shielded.
Claim 14
Dependent Claim
25 words
A cover according to claim 5, wherein a shield member is disposed between the second surface and the second conductor for electrically shielding the same.
Claim 15
Dependent Claim
19 words
A cover according to claim 13, wherein an insulator is interposed between the shield member and the second conductor.
Claim 16
Dependent Claim
25 words
A cover according to claim 7, wherein a shield member is disposed between the second surface and the second conductor for electrically shielding the same.
Claim 17
Dependent Claim
19 words
A cover according to claim 15, wherein an insulator is interposed between the shield member and the second conductor.
Claim 18
Dependent Claim
107 words
A high tension cord cover for covering at least one high tension cord having a conductive core therein carrying an ignition voltage current for an internal combustion engine, comprising: a first member made of an insulation material for holding the at least one high tension cord; a second member made of an insulation material and disposed at a fixed position with respect to the first member; and a second conductor embedded in the second member keeping a predetermined distance from the high tension cord and sandwiching a portion of the second member between said high tension cord and said second conductor such that a capacitor is formed.
Claim 19
Dependent Claim
107 words
A high tension cord cover for covering at least one high tension cord having a conductive core therein carrying an ignition voltage current for an internal combustion engine, comprising: a first member made of an insulation material for holding the at least one high tension cord; a second member made of an insulation material and disposed at a fixed position with respect to the first member; and a second conductor embedded in the second member keeping a predetermined distance from the high tension cord and sandwiching a portion of the second member between said high tension cord and said second conductor such that a capacitor is formed.
Claim 20
Dependent Claim
37 words
A cover according to claim 17, wherein either of the first and second members comprises a cover for covering a groove formed at a portion of the engine for receiving the at least one high tension cord.
Claim 21
Dependent Claim
16 words
A cover according to claim 18, wherein the portion comprises a cylinder head of the engine.
Claim 22
Dependent Claim
30 words
A cover according to claim 17, wherein the second member comprises the cover for covering the groove and the first member is placed at the inner position in the groove.
Claim 23
Dependent Claim
24 words
A cover according to claim 20, wherein the first member is formed with a cord retaining section at a surface opposing the second member.
Claim 24
Dependent Claim
43 words
A cover according to claim 21, wherein the cord retaining section formed at the first member comprises recesses configured side by side and each having a semicircular cross section and a plurality of the high tension cords are placed in the individual recesses.
Claim 25
Dependent Claim
35 words
A cover according to claim 22, wherein the second conductor is embedded in the second member at a position keeping the predetermined distance from each of the high tension cords retained at the first member.
Claim 26
Dependent Claim
15 words
A cover according to claim 23, wherein the second conductor has a plate like shape.
Claim 27
Dependent Claim
23 words
A cover according to claim 24, wherein the width of the second conductor is not less than the total width of the recesses.
Claim 28
Dependent Claim
15 words
A cover according to claim 22, wherein a cut is formed between the adjacent recesses.
Claim 29
Dependent Claim
13 words
A cover according to claim 17, wherein the second conductor is electrically shielded.
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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) | 1997-09-26 | 1998-03-28 | 1998-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-26 | 2002-03-28 | 2002-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-26 | 2006-03-28 | 2006-09-27 | $7700.00 | Window Closed / Lapsed |