Patent US3841282A successfully refreshed from Google Patents.
US3841282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air supply valve
Assignee: Ford Motor Co
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Filing: 1973-02-28
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Granted: 1974-10-15
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Expires: 1993-02-28
Abstract
Abstract An integrated air supply system and ignition cut-off mechanism are shown for use as add-on equipment for an internal combustion engine having an induction system with the usual intake manifold. The air supply system functions to introduce air directly to the intake manifold in multiple stages corresponding to the magnitude of intake manifold vacuum, thereby prevent backfiring in the exhaust manifold; similarly, during conditions of engine shutdown the air supply functions to dilute the engine air-fuel mixture for a predetermined period. A valve comprises part of the multiple stage air-supply system and is responsive to the outlet pressure of said system.
Inventors
- 👤 J Rogerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:33
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/04; F02M23/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S123/00; Y10S123/11; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
In an internal combustion engine having an induction system for supplying a mixture of air and fuel to an intake manifold thereof and a spark ignition system, the combination comprising: a. a duct supplying ambient air to said intake manifold, b. means controlling admission of air through said duct only during conditions of engine deceleration, said means being effective to vary the quantity of ambient air so admitted in proportion to the magnitude of said engine deceleration, and c. means responsive to de-energization of said spark ignition system to override said proportioning means so that a predetermined maximum amount of ambient air is admitted through said duct.
Claim 2
Dependent Claim
107 words
In an internal combustion engine having an induction system for supplying a mixture of air and fuel to an intake manifold thereof and a spark ignition system, the combination comprising: a. a duct supplying ambient air to said intake manifold, b. means controlling admission of air through said duct only during conditions of engine deceleration, said means being effective to vary the quantity of ambient air so admitted in proportion to the magnitude of said engine deceleration, and c. means responsive to de-energization of said spark ignition system to override said proportioning means so that a predetermined maximum amount of ambient air is admitted through said duct.
Claim 3
Dependent Claim
263 words
In an internal combustion engine having an induction system for supplying a mixture or air and fuel to an intake manifold thereof, the combination comprising: a. a duct supplying ambient air to said intake manifold, and b. means controlling admission of air through said duct only during conditions of engine deceleration, said means being effective to vary the quantity of ambient air so admitted in proportion to the magnitude of said engine deceleration, said admitting means comprising a valve element normally biased to a position closing said duct, and a servo mechanism for overcoming said bias in response to engine deceleration, said servo mechanism having a diaphragm operably connected to said element and subject to pressure in said intake manifold so that, upon a sudden increase in manifold vacuum due to engine deceleration, the vacuum pressure on said diaphragm will urge said valve element to an open position in opposition to said bias, said bias comprising an assembly providing staged bias forces to define a second stage, said assembly has a movable second element, a stop, and a second spring urging said second element against said stop, to define a first stage said assembly has a first spring acting between said stopped second element and said valve element to urge said valve element to a closed position, said valve element being moved to a minimum range of positions when said servo-mechanism is effective to overcome only said first spring and to a maximum range of position when said servo-mechanism is effective to overcome not only said first spring but also said second spring.
Claim 4
Dependent Claim
263 words
In an internal combustion engine having an induction system for supplying a mixture or air and fuel to an intake manifold thereof, the combination comprising: a. a duct supplying ambient air to said intake manifold, and b. means controlling admission of air through said duct only during conditions of engine deceleration, said means being effective to vary the quantity of ambient air so admitted in proportion to the magnitude of said engine deceleration, said admitting means comprising a valve element normally biased to a position closing said duct, and a servo mechanism for overcoming said bias in response to engine deceleration, said servo mechanism having a diaphragm operably connected to said element and subject to pressure in said intake manifold so that, upon a sudden increase in manifold vacuum due to engine deceleration, the vacuum pressure on said diaphragm will urge said valve element to an open position in opposition to said bias, said bias comprising an assembly providing staged bias forces to define a second stage, said assembly has a movable second element, a stop, and a second spring urging said second element against said stop, to define a first stage said assembly has a first spring acting between said stopped second element and said valve element to urge said valve element to a closed position, said valve element being moved to a minimum range of positions when said servo-mechanism is effective to overcome only said first spring and to a maximum range of position when said servo-mechanism is effective to overcome not only said first spring but also said second spring.
References Cited (Backward Citations)
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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) | 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 |