Patent US4617907A successfully refreshed from Google Patents.
US4617907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition unit in the ignition system of an internal combustion engine
Assignee: Hoerbiger Control Systems AB
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Filing: 1984-06-28
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Granted: 1986-10-21
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Expires: 2004-06-28
Abstract
Abstract An ignition unit included in the ignition system of an internal combustion engine includes a plurality of fingerlike connection pieces (2) extending from a common upper part (4) in the ignition unit and connectible to a corresponding number of spark plugs in the engine, the upper part including components included in a high-tension block, each connection piece (2) including an ignition element (20) with an ignition coil for generating ignition voltage, and a connection device (22) for connecting and for transmitting high-tension current to the engine spark plugs. To achieve reliable voltage transmission each ignition element has cable-free electrical connection both to contact means (47) in the upper part (4) and to contact means (27) in its connection device (22).
Inventors
- 👤 Sven H. Johansson
- 👤 Jan G. Nytomt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:11
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/02; H01T13/04; F; F02; F02P; F02P13/00; F02P7/00; F02P7/02; F02P7/021; F02P7/026; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
126 words
An ignition unit included in the ignition system of an internal combustion engine and including a plurality of finger-like connection pieces (2) extending from a common upper part (4) in the ignition unit and connectible to a corresponding number of spark plugs in the engine, said upper part including components included in a high-tension block, each connection piece (2) including an ignition element (20) with an ignition coil for generating ignition voltage, as well as a connection device (22) for connecting and for transmitting high-tension current to the engine spark plugs, characterized in that each ignition element (20) in the ignition unit has cable-free electrical connection both to contact means (47) in the upper part (4) and to contact means (27) in its connection device (22).
Claim 2
Dependent Claim
126 words
An ignition unit included in the ignition system of an internal combustion engine and including a plurality of finger-like connection pieces (2) extending from a common upper part (4) in the ignition unit and connectible to a corresponding number of spark plugs in the engine, said upper part including components included in a high-tension block, each connection piece (2) including an ignition element (20) with an ignition coil for generating ignition voltage, as well as a connection device (22) for connecting and for transmitting high-tension current to the engine spark plugs, characterized in that each ignition element (20) in the ignition unit has cable-free electrical connection both to contact means (47) in the upper part (4) and to contact means (27) in its connection device (22).
Claim 3
Dependent Claim
31 words
Ignition unit as claimed in claim 1, characterized in that each ignition element (20) is enclosed in a surrounding protective sleeve (18), which is rigidly mounted in the upper part (4).
Claim 4
Dependent Claim
23 words
Ignition unit as claimed in claim 2, characterized in that each protective sleeve (18) constitutes a portion of an integral outer casing (16).
Claim 5
Dependent Claim
20 words
Ignition unit as claimed in claim 3, characterized in that the outer casing (16) is integrally formed from plastics material.
Claim 6
Dependent Claim
26 words
Ignition unit as claimed in claim 3, characterized in that the outer casing (16) is mountably attached to the upper part (4) of the ignition unit.
Claim 7
Dependent Claim
37 words
Ignition unit as claimed in claim 2, characterized in that the protective sleeve (18) and the ignition element (20) are formed with coacting conical surfaces (57) for centering the ignition element (20) in the protective sleeve (18).
Claim 8
Dependent Claim
30 words
Ignition unit as claimed in claim 6, characterized in that the ignition element (20) and the upper part (4) are formed with coating guide elements (44,50) for mutual radial location.
Claim 9
Dependent Claim
51 words
Ignition unit as claimed in claim 7, characterized in that the ignition element (20) is formed with a substantially circular end surface which is pressed into sealing engagement against a corresponding end surface (51) on the upper part (4), there being coacting contact means (45,46,47) radially inwards of said sealing surface.
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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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |