US4404798A
Expired / Lapsed
US
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Exhaust gas cleaning device for internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1981-10-07
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Granted: 1983-09-20
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Expires: 2001-10-07
Abstract
Abstract An exhaust gas cleaning device for an internal combustion engine comprises a housing provided with an inlet port which is communicated with an exhaust pipe of an internal combustion engine and an outlet port, two particulates collecting members disposed in two independent exhaust gas flowing passages which are communicated with the inlet port through an inlet chamber and with the outlet port through an outlet chamber, a butterfly valve provided in the inlet chamber for alternately directing the exhaust gases into either one of the exhaust gas flowing passages and a heated air supplying means for burning off the particulates collected by the particulates collecting members, which is provided with a heated air outlet port opening into the inlet chamber so as to be opposed to the inlet port with the butterfly valve therebetween.
Inventors
- 👤 Shigeru Takagi
- 👤 Yukihisa Takeuchi
- 👤 Shigeru Kamiya
- 👤 Masahiro Tomita
- 👤 Kiyohiko Oishi
- 👤 Kiyoshi Kobashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:05
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/031; F01N3/032; F01N13/00; F01N13/011; F01N13/017; F01N3/0211; F01N3/023; F01N2330/00; F01N2330/06; F01N2350/00; F01N2350/02; F01N2350/06; F01N2410/00; F01N2410/04; F01N2470/00; F01N2470/16; Y; Y10; Y10S; Y10S55/00; Y10S55/10; Y10S55/30
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
265 words
An exhaust gas cleaning device for collecting and burning particulates contained within exhaust gases discharged from an internal combustion engine, comprising: a housing provided with an exhaust gas inlet chamber which is communicated with an exhaust gas inlet port, an exhaust gas outlet chamber which is communicated with an exhaust gas outlet port, and two independent exhaust gas flowing passages which are formed between said exhaust gas inlet chamber and said exhaust gas outlet chamber so as to be communicated therewith; a pair of particulates collecting members for collecting said particulates, which are made of heat resistant material having air permeability; each of said collecting members being disposed within each of said exhaust gas flowing passages; an exhaust gas diverter valve which is disposed within said inlet chamber so as to be opposed to said exhaust gas inlet port for alternately directing the exhaust gas flowing from said exhaust gas inlet port to either one of said exhaust gas flowing passage while blocking the exhaust gases to the other flowing passage; a heated air supplying means for burning off said particulates collected in said collecting member disposed in said other flowing passage; said exhaust gas diverter valve being composed of a butterfly valve which is supported by a valve shaft in the central portion of said inlet chamber so as to turn by a predetermined degree clockwise and counterclockwise; and said heated air supplying means comprising a heated air outlet port which opens into said exhaust gas inlet chamber so as to be opposed to said exhaust gas inlet port with said butterfly valve between.
Claim 2
Dependent Claim
265 words
An exhaust gas cleaning device for collecting and burning particulates contained within exhaust gases discharged from an internal combustion engine, comprising: a housing provided with an exhaust gas inlet chamber which is communicated with an exhaust gas inlet port, an exhaust gas outlet chamber which is communicated with an exhaust gas outlet port, and two independent exhaust gas flowing passages which are formed between said exhaust gas inlet chamber and said exhaust gas outlet chamber so as to be communicated therewith; a pair of particulates collecting members for collecting said particulates, which are made of heat resistant material having air permeability; each of said collecting members being disposed within each of said exhaust gas flowing passages; an exhaust gas diverter valve which is disposed within said inlet chamber so as to be opposed to said exhaust gas inlet port for alternately directing the exhaust gas flowing from said exhaust gas inlet port to either one of said exhaust gas flowing passage while blocking the exhaust gases to the other flowing passage; a heated air supplying means for burning off said particulates collected in said collecting member disposed in said other flowing passage; said exhaust gas diverter valve being composed of a butterfly valve which is supported by a valve shaft in the central portion of said inlet chamber so as to turn by a predetermined degree clockwise and counterclockwise; and said heated air supplying means comprising a heated air outlet port which opens into said exhaust gas inlet chamber so as to be opposed to said exhaust gas inlet port with said butterfly valve between.
Claim 3
Dependent Claim
24 words
An exhaust gas cleaning device according to claim 1, wherein: each of said collecting members is made of foamed ceramic or ceramic honeycomb structure.
Claim 4
Dependent Claim
51 words
An exhaust gas cleaning device according to claim 1, wherein: said exhaust gas flowing passages are formed in parallel with each other between said exhaust gas inlet chamber and said exhaust gas outlet chamber; and said exhaust gas flowing passages are separated from each other by a partition wall formed therebetween.
Claim 5
Dependent Claim
56 words
An exhaust gas cleaning device according to claim 3, wherein: said heated air supplying means further comprises a heated air supplying passage which supplies heated air into said exhaust gas inlet chamber from said heated air outlet port; and said heated air supplying passage and said heated air outlet port are formed in said partition wall.
Claim 6
Dependent Claim
36 words
An exhaust gas cleaning device according to claim 1, wherein: said exhaust gas flowing passages are coaxially formed; and said exhaust gas inlet chamber is formed between the opposed ends of said exhaust gas flowing passages.
Claim 7
Dependent Claim
50 words
An exhaust gas cleaning device according to claim 5, wherein: said exhaust gas inlet port opens in the axially central portion of said exhaust gas inlet chamber; and said heated air outlet port opens into said exhaust gas inlet chamber on the opposite side to said exhaust gas inlet port.
Claim 8
Dependent Claim
70 words
An exhaust gas cleaning device according to claim 6, wherein: said housing is composed of a cylindrical outer housing and a cylindrical inner housing which is disposed within said outer housing so as to be communicated with each other in both ends thereof; said exhaust gas inlet chamber is formed in the axially central portion of said inner housing; and said particulates collecting members are disposed within said inner housing.
Claim 9
Dependent Claim
59 words
An exhaust gas cleaning device according to claim 7, wherein: said housing further comprises a plurality of exhaust gas supplying passages which are communicated with said exhaust gas inlet chamber through said inlet port for supplying exhaust gases from a plurality of exhaust ports of said internal combustion engine into said exhaust gas inlet chamber through said inlet port.
Claim 10
Dependent Claim
151 words
An exhaust gas cleaning device according to claim 1, wherein: said butterfly valve is composed of an elliptical valve plate of which short axis is rotatably supported within said exhaust gas inlet chamber and two valve seats which receive said valve plate when said valve plate turns by a predetermined angle; in the peripheral portion of said valve plate, inclined surfaces extending from both surfaces of said valve plate are formed; the angle of inclination of each of said inclined surfaces to each of said surfaces of said valve plate is continuously changed; said angle of inclination is the maximum in the peripheral portion of said valve plate opposed to a long axis thereof and is the minimum in the peripheral portion of said valve plate opposed to said short axis; and each of said valve seats has a shape corresponding to the shape of the periphery of said valve plate.
Claim 11
Dependent Claim
102 words
An exhaust gas cleaning device according to claim 9, wherein: said valve plate has a shape which is obtained by cutting a plate in the surfaces contacted with two imaginary columns having the same diameter, of which axes extend on the same plane perpendicular to said plate, intersect at a certain point positioned at a center of said plate in the direction of thickness, and are inclined to the surface of said plate at the same angle as each other and; each of said inclined surfaces has a shape formed along the outer peripheral surface of each of said two imaginary columns.
Claim 12
Dependent Claim
53 words
An exhaust gas cleaning device according to claim 1, wherein: a heat resistant shock absorbing member and at least one annular heat resistant sealing member are disposed in the space formed between the outer surface of each of said particulates collecting members and the wall of each of said exhaust gas flowing passages.
Claim 13
Dependent Claim
19 words
An exhaust gas cleaning device according to claim 11, wherein: said shock absorbing member is made of metallic wire.
Claim 14
Dependent Claim
32 words
An exhaust gas cleaning device according to claim 11, wherein: said sealing member is formed by compressing a metallic wire fabric so as to have a wavy, V-shaped or trapezoid cross section.
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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |