US3751915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air induction valve for exhaust emission control system
Assignee: Motors Liquidation Co
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Filing: 1971-03-01
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Granted: 1973-08-14
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Expires: 1991-03-01
Abstract
Abstract An air induction valve for use in the air injection unit of an exhaust emission control system for an internal combustion engine in which exhaust pressure pulsations are used to induce air flow through the air injection unit, the air induction valve including check valves to permit the ingress of air into the air injection unit while preventing egress of exhaust gases therefrom and a diaphragm actuated control valve to prevent air injection during engine deceleration.
Inventors
- 👤 E Ranft
- 👤 K Pfrengle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:03
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/22; F01N3/227; F01N3/24; F01N3/30; F16; F16K; F16K15/00; F16K15/14; F16K15/16; F16K15/162; F02; F02B; F02B61/00; F02B61/04; F02B61/045; F16K2200/00; F16K2200/20; F16K2200/203; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7879; Y10T137/7888; Y10T137/7891; Y10T137/7892
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
275 words
An exhaust emission control system for use on an internal combustion engine having an induction passage and having N number of combustion chambers, said exhaust emission control system comprising exhaust means including manifold means and exhaust pipe means with at least a first exhaust manifold means and a first exhaust pipe means, said first exhaust manifold means being connected to not more than four of said N combustion chambers, air induction means having air inlet means and air discharge means, said air discharge means extending into said exhaust means to direct air toward said combustion chambers, air induction valve means including a housing defining passage means through which air can flow and including inlet means in communication with the atmosphere and discharge means connected to said air inlet means, check valve means in said passage means responsive to sub-ambient exhaust pressure in said exhaust means to control the flow of air to the combustion chambers, a valve means positioned for controlling air flow through said inlet means, said housing including a chamber, pressure responsive diaphragm means dividing said chamber to form first and second pressure chambers, means connecting said valve means to said diaphragm whereby said valve means is positioned by said diaphragm, conduit means extending from said first pressure chamber and adapted to be connected to the induction passage to subject said first pressure chamber to pressure in the induction passage, a timing valve including means prOviding a restricted passage for controlling the pressures in said first and second pressure chambers and, means normally biasing said diaphragm means in a valve opening position whereby said valve means is normally maintained in an open position.
Claim 2
Dependent Claim
275 words
An exhaust emission control system for use on an internal combustion engine having an induction passage and having N number of combustion chambers, said exhaust emission control system comprising exhaust means including manifold means and exhaust pipe means with at least a first exhaust manifold means and a first exhaust pipe means, said first exhaust manifold means being connected to not more than four of said N combustion chambers, air induction means having air inlet means and air discharge means, said air discharge means extending into said exhaust means to direct air toward said combustion chambers, air induction valve means including a housing defining passage means through which air can flow and including inlet means in communication with the atmosphere and discharge means connected to said air inlet means, check valve means in said passage means responsive to sub-ambient exhaust pressure in said exhaust means to control the flow of air to the combustion chambers, a valve means positioned for controlling air flow through said inlet means, said housing including a chamber, pressure responsive diaphragm means dividing said chamber to form first and second pressure chambers, means connecting said valve means to said diaphragm whereby said valve means is positioned by said diaphragm, conduit means extending from said first pressure chamber and adapted to be connected to the induction passage to subject said first pressure chamber to pressure in the induction passage, a timing valve including means prOviding a restricted passage for controlling the pressures in said first and second pressure chambers and, means normally biasing said diaphragm means in a valve opening position whereby said valve means is normally maintained in an open position.
Claim 3
Dependent Claim
92 words
An exhaust emission control system according to claim 1 wherein said exhaust means further includes a second exhaust manifold means and second exhaust pipe means, said second exhaust manifold means being connected to not more than N/2 number of combustion chambers, said first exhaust manifold means being connected to the remaining combustion chambers, said air induction valve means including a first set of check valve means to supply air to said first exhaust manifold means and a second set of check valve means to supply air to said second exhaust manifold means.
Claim 4
Dependent Claim
58 words
An exhaust emission control system according to claim 2 wherein said air induction valve means includes thermal responsive stop means positioned adjacent said check valve means to normally allow operation of said check valve means but moveable in response to temperature increases to close said check valves means upon sudden increases in temperature adjacent said thermostatic stop means.
Claim 5
Dependent Claim
249 words
An air induction valve for use in the exhaust emission control system of an internal combustion engine having an induction passage and exhaust manifold means defining a portion of a combustibles flow path and conduit means adapted to supply air to the combustibles flow path, said air induction valve comprising a housing defining a passage through which air can flow and including an inlet and discharge means, said discharge means being adapted for connection to the conduit means, reed valve seat means positioned in said passage and having therein means defining ports and a seat extending from and surrounding each of said ports, a reed member subject to curvature secured at one end to said seat and having a port closing portion, stop means for each of said reeds to limit opening of said reeds, valve means positioned for controlling air flow through said inlet, said housing further defining a chamber pressure responsive diaphragm means dividing said chamber into a first chamber and a second chamber and being operatively connected for positioning said valve means and including means to normally bias said valve means open relative to said inlet, conduit means extending from said first chamber and adapted to be connected to the induction passage to subject said first chamber to induction pressure, and timing valve means including means providing a restricted passage for equalizing the pressures in said first chamber and said second chamber after a period of time as determined by the size of said restricted passage.
Claim 6
Dependent Claim
249 words
An air induction valve for use in the exhaust emission control system of an internal combustion engine having an induction passage and exhaust manifold means defining a portion of a combustibles flow path and conduit means adapted to supply air to the combustibles flow path, said air induction valve comprising a housing defining a passage through which air can flow and including an inlet and discharge means, said discharge means being adapted for connection to the conduit means, reed valve seat means positioned in said passage and having therein means defining ports and a seat extending from and surrounding each of said ports, a reed member subject to curvature secured at one end to said seat and having a port closing portion, stop means for each of said reeds to limit opening of said reeds, valve means positioned for controlling air flow through said inlet, said housing further defining a chamber pressure responsive diaphragm means dividing said chamber into a first chamber and a second chamber and being operatively connected for positioning said valve means and including means to normally bias said valve means open relative to said inlet, conduit means extending from said first chamber and adapted to be connected to the induction passage to subject said first chamber to induction pressure, and timing valve means including means providing a restricted passage for equalizing the pressures in said first chamber and said second chamber after a period of time as determined by the size of said restricted passage.
Claim 7
Dependent Claim
34 words
An air induction valve according to claim 4 wherein said stop means is a thermal responsive bimetallic element adapted to hold said reed members against their seats when subjected to high temperature exhaust gases.
Claim 8
Dependent Claim
39 words
An air induction valve according to claim 4 wherein the free end of each of said reed most remote from said end secured to said seat extends over said seat when said reed is in a port closing position.
Claim 9
Dependent Claim
78 words
An air induction valve according to claim 4 wherein two opposed reed valve seat means are positioned in said passage on opposite sides relative to said inlet, each of said reed valve seat means comprises a valve seat member having a truncated pyramidal portion with four sides, an open flanged base and closed end wall, each of said sides having means defining a port, a reed being positioned on each of said sides to overlie the respective port.
Claim 10
Dependent Claim
51 words
An air induction valve according to claim 7 wherein said stop means are thermal responsive bimetallic elements each of which is of an open frusto-pyramidal from complementary to said reed valve seat means having an end wall secured to said closed end wall and having stop fingers extending over said reeds.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |