Patent US3842299A successfully refreshed from Google Patents.
US3842299A
Expired / Lapsed
US
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Devices for sensing the speed and position of an engine flywheel
Assignee: Peugeot & Renault
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Filing: 1973-04-30
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Granted: 1974-10-15
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Expires: 1993-04-30
Abstract
Abstract A speed and position sensing device mounted in a casing in front of the flywheel of an internal combustion engine, and comprising sensing members, said device comprising a body, the active portions of which are located in front of abrupt changes of the periphery of said flywheel, said body being adapted to penetrate into at least one casing through holes, the axes of which are parallel with the rotation axes of said flywheel. Said sensing device can be used e.g. for energizing an electronic ignition device or controlling gasoline injection.
Inventors
- 👤 G Lombard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:21
CPC Classifications
F; F02; F02P; F02P17/00; F02P17/02; F02P17/04; G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/488
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
166 words
A speed and position sensing device mounted in a casing in front of the flywheel of an internal combustion engine having a crankcase, said flywheel having on one side of its periphery a plurality of projections constituting a first kind of abrupt changes in the periphery and on the other side of its periphery at least one other kind of abrupt change, and the sensing device comprising at least two sensing members preferably of the variable reluctance type, said device comprising a body having at least two active portions each enclosing a respective one of said at least two sensing members, each of said portions being located radially outwardly of a respective one of said kinds of abrupt changes in the periphery of said flywheel and being parallel to the axis of said flywheel, said body being adapted to penetrate through holes into at least one casing fixed to said engine, the axes of said holes being parallel with the axis of rotation of said flywheel.
Claim 2
Dependent Claim
166 words
A speed and position sensing device mounted in a casing in front of the flywheel of an internal combustion engine having a crankcase, said flywheel having on one side of its periphery a plurality of projections constituting a first kind of abrupt changes in the periphery and on the other side of its periphery at least one other kind of abrupt change, and the sensing device comprising at least two sensing members preferably of the variable reluctance type, said device comprising a body having at least two active portions each enclosing a respective one of said at least two sensing members, each of said portions being located radially outwardly of a respective one of said kinds of abrupt changes in the periphery of said flywheel and being parallel to the axis of said flywheel, said body being adapted to penetrate through holes into at least one casing fixed to said engine, the axes of said holes being parallel with the axis of rotation of said flywheel.
Claim 3
Dependent Claim
34 words
A sensing device according to claim 1, wherein said other abrupt change in said flywheel periphery comprises at least one radial slot, one of said sensing members being disposed radially outwardly of said slot.
Claim 4
Dependent Claim
36 words
A sensing device according to claim 1, wherein said device body is mounted in axial abutment against said engine crank-case in order to provide accurate axial positioning of said sensing members with respect to said flywheel.
References Cited (Backward Citations)
US2556471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |