US3722486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition timing devices for internal combustion engines
Assignee: Peugeot & Renault
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Filing: 1971-10-29
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Granted: 1973-03-27
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Expires: 1991-10-29
Abstract
Abstract In this device for automatically adjusting the advance and/or retard of the ignition system of internal combustion engines, a solenoid valve is interposed between the corresponding advance and/or retard control capsule connected to the engine induction manifold and to the distributor of the ignition system, a buffer capacity, an output limiting member interposed between said capacity and said manifold, and a pressure-responsive electric switch connected to said manifold and also to said buffer capacity so as to act in one or the other direction as a function of variations in a differential pressure for closing during a predetermined time period, by means of said output limiting member, and/or said buffer capacity at least one electric contact controlling said solenoid valve.
Inventors
- 👤 J Rivere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:31
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/10; F02P5/103
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
149 words
Ignition timing device for internal combustion engines comprising an induction manifold for the air/fuel gaseous mixture, an ignition distributor, at least one vacuum diaphragm capsule for controlling the ignition timing of the distributor, each capsule being connected to the reduction manifold, characterized in that it comprises a control solenoid-valve interposed between each vacuum capsule and the engine induction manifold, a buffer capacity for the induction gas, a fluid output limiting member connecting said buffer capacity to the induction manifold, and a deferred-action, pressure-responsive electric switch connected to said induction manifold and to said buffer capacity, and adapted to act in one or the other direction as a function of the variation in a differential pressure applied to said switch in case of pressure variation between said manifold and said buffer capacity so as to close during a predeteRmined time period, at least one electric contact controlling the corresponding solenoid-valve.
Claim 2
Dependent Claim
149 words
Ignition timing device for internal combustion engines comprising an induction manifold for the air/fuel gaseous mixture, an ignition distributor, at least one vacuum diaphragm capsule for controlling the ignition timing of the distributor, each capsule being connected to the reduction manifold, characterized in that it comprises a control solenoid-valve interposed between each vacuum capsule and the engine induction manifold, a buffer capacity for the induction gas, a fluid output limiting member connecting said buffer capacity to the induction manifold, and a deferred-action, pressure-responsive electric switch connected to said induction manifold and to said buffer capacity, and adapted to act in one or the other direction as a function of the variation in a differential pressure applied to said switch in case of pressure variation between said manifold and said buffer capacity so as to close during a predeteRmined time period, at least one electric contact controlling the corresponding solenoid-valve.
Claim 3
Dependent Claim
61 words
Device according to claim 1, characterized in that said output limiting member comprises a gauged tubular passage interconnecting the buffer capacity and the engine induction manifold, said passage having a reduced cross-sectional passage area at its inlet corresponding to said buffer capacity, the dimensions of said passage being determined as a function of the desired fluid transfer time through said passage.
Claim 4
Dependent Claim
16 words
Device according to claim 2, characterized in that said buffer capacity is of the variable-volume type.
Claim 5
Dependent Claim
86 words
Device according to claim 1, characterized in that said electric switch comprises an insulating case divided by a flexible resilient diaphragm of variable stiffness into two chambers connected to said induction manifold and to said buffer capacity, respectively, said diaphragm being electrically conductive and connected to one terminal of a source of current, and a fixed contact in at least one of said switch chambers which registers with the central portion of said diaphragm and is adapted to co-act therewith for energizing the corresponding solenoid valve.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |