US3793833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for reducing harmful constituents of the waste gases in internal combustion engines of automobiles
Assignee: Audi AG
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Filing: 1971-11-12
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Granted: 1974-02-26
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Expires: 1991-11-12
Abstract
Abstract This invention relates to a device for reducing harmful waste gas components of automobile internal combustion engines by external ignition. A waste gas reactor is fitted on the engine exhaust pipe, in which the unburnt waste gas components are burnt, with the addition of air, if necessary, and which is equipped with combustion time control that can be adjusted for a predetermined time on starting in the direction of retarded ignition by the diminished pressure in the suction duct.
Inventors
- 👤 Basshuysen R Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:51
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/155; F02P5/1558; F02B; F02B75/00; F02B75/10; F02M; F02M2700/00; F02M2700/34; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
181 words
A device for diminishing the harmful waste gas constituents of an automobile combustion engine with external ignition, an exhaust pipe, a waste gas reactor fitted to the exhaust pipe of the engine and in which the unburnt waste gas constituents are subsequently burnt, a suction duct comprising a throttle valve, an ignition point regulator which is adjustable by decreased pressure in the suction duct in the direction of retarded ignition, a diaphragm box for the adjustment of the regulator, a pair of decreased pressure tubings coupling said diaphragm box with the suction duct downstream of said throttle valve, a second valve interposed between the tubings which valve in an open state connects the diaphragm box with the suction duct and in a closed state connects the diaphragm box with the atmosphere, an electrical time switch controlling said second valve, a circuit of said time switch comprising a switch which closes said circuit by the starting of the engine whereby said time switch is energized to cause said second valve to open and, after a predetermined time, permits it to close again.
Claim 2
Independent Claim
181 words
A device for diminishing the harmful waste gas constituents of an automobile combustion engine with external ignition, an exhaust pipe, a waste gas reactor fitted to the exhaust pipe of the engine and in which the unburnt waste gas constituents are subsequently burnt, a suction duct comprising a throttle valve, an ignition point regulator which is adjustable by decreased pressure in the suction duct in the direction of retarded ignition, a diaphragm box for the adjustment of the regulator, a pair of decreased pressure tubings coupling said diaphragm box with the suction duct downstream of said throttle valve, a second valve interposed between the tubings which valve in an open state connects the diaphragm box with the suction duct and in a closed state connects the diaphragm box with the atmosphere, an electrical time switch controlling said second valve, a circuit of said time switch comprising a switch which closes said circuit by the starting of the engine whereby said time switch is energized to cause said second valve to open and, after a predetermined time, permits it to close again.
Claim 3
Dependent Claim
91 words
A device in accordance with claim 1 in which two diaphragm boxes are provided for the adjustment of the ignition point regulator, the first of which is coupled with the suction tube, upstream of the throttle valve, while the second is coupled downstream of the throttle valve, the second valve is arranged so as to connect the second diaphragm box with the suction tube downstream of the throttle valve and that the second valve is so made that in the closed state the second diaphragm box is connected with the atmosphere.
Claim 4
Dependent Claim
49 words
A device in accordance with claim 2 in which the second valve is constructed as a two-way magnetic valve and which in the activated position makes a contact between the diaphragm box and the suction duct, and which in the other position connects the diaphragm box to the atmosphere.
References Cited (Backward Citations)
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US3626909A
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |