US3759499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decontamination of internal combustion engine exhaust gases and devices for the implementation of the procedures
Assignee: INGBUERO fur ANGEWANDTE PHYSIK
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Filing: 1970-06-30
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Granted: 1973-09-18
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Expires: 1990-06-30
Abstract
Abstract Apparatus for decontamination of internal combustion engine exhaust gases by the preparation of a flammable and ignitable air-fuel mixture with a variable air ratio figure lambda by means of a throttle flap adjustment for regulating the fuel jet flow resistance, and which is adjustable such that fuel atomization is performed. This is accomplished by the fact that the airstream flowing from the air filter to the carburetor, particularly in the lower engine r.p.m. range i.e. if the throttle flap swivel range is small, is accelerated in the crescent-shaped gap between throttle flap (10) and carburetor duct wall (20), on the whole throttle flap semi-circumference facing the fuel jets, to nearly sonic or supersonic speed. Furthermore, at the throttle flap swivel range in the medium engine operating range at subsonic speed, the air stream flowing from the air filter to the carburetor is additionally accelerated by further jet effect, whereas the airstream from the air filter to the carburetor in the operating range up to full engine load is homogenized by very intensive elimination of the turbulence.
Inventors
- 👤 L Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:31
CPC Classifications
F; F02; F02M; F02M29/00; F02M29/04; F02M19/00; F02M23/00; F02M23/12; F02M29/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S261/00; Y10S261/78
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
169 words
Apparatus for decontaminating the exhaust gases produced by an internal combustion engine by atomizing the fuel and varying the air-fuel ratio figure lambda , comprising: means defining a carburetor duct; a throttle flap in said carburetor duct means for accelerating the air-fuel mixture flow past said throttle flap along a first path; rim means on said throttle flap adjacent the periphery thereof for generating a vortex on the downstream side of said throttle flap along said first path; means defining at least one bore in said rim means for accelerating said air-fuel mixture flow in a streamlined manner past said throttle flap in a second path intersecting said first path to effect an elimination of said vortex and thereby provide a homogeneous mixture of said air and said fuel; air regulating plate means arranged downstream of said throttle flap means for carbureting the fuel which has condensed on the wall of said carburetor duct; and fresh air supply means for supplying additional air downstream of said throttle flap means.
Claim 2
Dependent Claim
169 words
Apparatus for decontaminating the exhaust gases produced by an internal combustion engine by atomizing the fuel and varying the air-fuel ratio figure lambda , comprising: means defining a carburetor duct; a throttle flap in said carburetor duct means for accelerating the air-fuel mixture flow past said throttle flap along a first path; rim means on said throttle flap adjacent the periphery thereof for generating a vortex on the downstream side of said throttle flap along said first path; means defining at least one bore in said rim means for accelerating said air-fuel mixture flow in a streamlined manner past said throttle flap in a second path intersecting said first path to effect an elimination of said vortex and thereby provide a homogeneous mixture of said air and said fuel; air regulating plate means arranged downstream of said throttle flap means for carbureting the fuel which has condensed on the wall of said carburetor duct; and fresh air supply means for supplying additional air downstream of said throttle flap means.
Claim 3
Dependent Claim
16 words
Apparatus according to claim 1, wherein said rim means varies in height along the length thereof.
Claim 4
Dependent Claim
22 words
Apparatus according to claim 1, wherein said rim means extends along said periphery on one side of the axis of rotation thereof.
Claim 5
Dependent Claim
20 words
Apparatus according to claim 1, wherein said fresh air supply means comprises an opening in said air regulating plate means.
Claim 6
Dependent Claim
32 words
Apparatus according to claim 1, wherein the plane of said throttle flap is perpendicular to the axis of said carburetor duct means when said internal combustion engine is at said idling speed.
Claim 7
Dependent Claim
65 words
Apparatus according to claim 1, wherein said rim means include means defining a plurality of nonradial openings therethrough so that the upper portion of said rim means shifts a large amount of air as compared to the flat portion of said throttle flap means due to an increased flow deflection of the air-fuel mixture ratio lambda in the direction of lambda > or = 0.
Claim 8
Dependent Claim
70 words
Apparatus according to claim 6, wherein said rim means includes means defining a sharp edge for producing a vortex in said air-fuel mixture downstream of said throttle flap means; and wherein said bore means in said rim means produce streamlined jets downstream of said throttle plate means to eliminate said vortex and thereby cause a homogenization of the air-fuel mixture throughout the downstream cross section of said carburetor duct means.
Claim 9
Dependent Claim
59 words
Apparatus according to claim 1, including a conventional bypass bore in said duct means adjacent said throttle flap means and a protuberance on the upper side of said throttle flap means and adapted to at least partially block said conventional bypass bore for the purpose of reducing the fuel supply when said internal combustion engine is at idle speed.
Claim 10
Dependent Claim
13 words
Apparatus according to claim 8, including a sniffle valve on said throttle flap.
Claim 11
Dependent Claim
30 words
Apparatus according to claim 1, wherein said fresh air supply means comprises a segment lever which can be actuated synchronously by a connection with the operating linkage of the carburetor.
Claim 12
Dependent Claim
44 words
Apparatus according to claim 10, wherein said segment lever preferably has an envelope curve for the throttle flap swivel range which concerns the exhaust gas decontamination for the regulation of the amount of time-intervalled additional fresh air, whereby the idling position remains fully covered.
Claim 13
Dependent Claim
22 words
Apparatus according to claim 1, wherein said air regulating plate means includes a pair of conically shaped upper and lower conduit means.
Claim 14
Dependent Claim
63 words
Apparatus according to claim 12, wherein said conically shaped lower conduit means comprises a pair of concentric conically shaped conduits defining a gap therebetween; and wherein the inner one of said conically shaped conduits has means defining openings in the wall thereof for atomizing the condensated fuel collected on said lower conduit means to thereby define a post carburetor for said condensated fuel.
Claim 15
Dependent Claim
20 words
Apparatus according to claim 12, wherein said upper conically shaped conduit means includes an annular flange extending radially outwardly therefrom.
Claim 16
Dependent Claim
15 words
Apparatus according to claim 4, wherein said annular flange has a plurality of openings therethrough.
Claim 17
Dependent Claim
89 words
Apparatus according to claim 14, wherein said air regulating plate means includes means defining an opening therethrough having annular recesses surrounding both the upper and lower ends of said opening; wherein said concially shaped lower conduit means comprises a pair of concentric, conically shaped conduits defining a gap therebetween; and wherein the outer one of said lower conduit means has an annular flange thereon extending radially outwardly therefrom, said annular flanges on said upper and lower conduit means being received in said recesses in said air regulating plate means.
Claim 18
Dependent Claim
21 words
Apparatus according to claim 1, wherein said fresh air supply means is mounted directly on said means defining said carburetor duct.
Claim 19
Dependent Claim
40 words
Apparatus according to claim 17, wherein said fresh air supply means comprises a housing having bearing support means thereon and roll guide means in said housing, said roll guide means being secured to to said bearing support means by nuts.
Claim 20
Dependent Claim
38 words
Apparatus according to claim 18, wherein an engaging lever is coupled, via a preferably adjustable linkage means, to a connection lever attached to a throttle flap shaft, said engaging lever extending in parallel relationship to said connection lever.
Claim 21
Dependent Claim
67 words
Apparatus according to claim 18, wherein said roll guide means has two cutouts on its surface, one of which is, for the guide swivel movement, in the fresh air supply tube area, whereas the other is formed as a form guide, the form and size of which is determined by the amount of fresh air required in the individual operating stages of an exhaust gas decontamination test.
Claim 22
Dependent Claim
69 words
Apparatus according to claim 20, wherein said roll guide means in its form guide and/or segment lever in its envelope curve are formed in such a way that the amount of additional fresh air is precisely rated that a free oxygen content, or oxygen portion O2 in the exhaust gas leaving the cylinder of the engine, is guaranteed to be within the limits of 0.5 to 2.0 vol. %.
Claim 23
Dependent Claim
39 words
Apparatus according to claim 18, including a fresh air supply tube threadedly connected to said housing, said fresh air supply tube being closed at the entrance by a thin-mesh filter and secured in place by a perforated screw cover.
Claim 24
Dependent Claim
48 words
Apparatus according to claim 22, including a drain tube on the housing connected to said downstream portion of said carburetor, said drain tube extending coaxially to the fresh-air supply tube, in order to transmit quantitatively regulated additional fresh air to said downstream portion of said carburetor duct means.
Claim 25
Dependent Claim
26 words
Apparatus according to claim 23, including a gap between said fresh air supply tube and said drain tube, said gap being adjustable by said threaded connection.
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |