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US5787706A
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US
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Exhaust gas purification device
Assignee: Volvo AB
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Filing: 1994-12-22
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Granted: 1998-08-04
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Expires: 2014-12-22
Abstract
Abstract An exhaust gas purification device (10) for trapping combustion engine exhaust emissions, particularly hydrocarbons and particulate matter, is disclosed. The device includes a casing (12) having an inlet (14) for exhaust gases from a combustion engine. The casing (12) houses a filtering and/or adsorbing medium (16), whilst a catalytic converter (22) is arranged downstream of the medium (16). A valve arrangement is provided for controlling exhaust gas flow through the filtering and/or adsorbing medium (16). The casing further includes a throughflow passage (18) adjacent the filtering and/or adsorbing medium (16), the passage running from the upstream end to the downstream end of the filtering and/or adsorbing medium (16). The passage also includes a throttling valve (20) responsive to temperatures in the device.
Inventors
- 👤 Gudmund Smedler
- 👤 Staffan Lundgren
- 👤 Edward Jobson
- 👤 Bjorn Dexell
- 👤 Ove Backlund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:24
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9481; F; F01; F01N; F01N13/00; F01N13/009; F01N13/0097; F01N3/00; F01N3/02; F01N3/021; F01N3/022; F01N3/0224; F01N3/08; F01N3/0807; F01N3/0821; F01N3/0828; F01N3/0835; F01N3/0871; F01N3/0878; F01N3/10; F01N3/24; F01N3/28; F01N3/2882; F01N2240/00; F01N2240/18; F01N2250/00; F01N2250/02; F01N2250/12; F01N2250/14; F01N2310/00; F01N2310/12; F01N2370/00; F01N2370/22; F01N2370/24; F01N2410/00; F01N2410/12; F02; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
123 words
An exhaust gas purification device for trapping combustion engine exhaust emissions, said device comprising a casing having an inlet for exhaust gases from a combustion engine, said casing further comprising an outer coaxial tube and an inner coaxial tube defining an annular space therebetween, said annular space being filled with a filtering medium having an upstream end and a downstream end and said inner coaxial tube forming a throughflow passage running from said upstream end to said downstream end of said filtering medium, a downstream catalytic converter arranged downstream of said filtering medium, and a valve arrangement comprising a throttling valve associated with said throughflow passage, said throttling valve responsive to temperatures in said device for controlling the flow through said filtering medium.
Claim 2
Dependent Claim
123 words
An exhaust gas purification device for trapping combustion engine exhaust emissions, said device comprising a casing having an inlet for exhaust gases from a combustion engine, said casing further comprising an outer coaxial tube and an inner coaxial tube defining an annular space therebetween, said annular space being filled with a filtering medium having an upstream end and a downstream end and said inner coaxial tube forming a throughflow passage running from said upstream end to said downstream end of said filtering medium, a downstream catalytic converter arranged downstream of said filtering medium, and a valve arrangement comprising a throttling valve associated with said throughflow passage, said throttling valve responsive to temperatures in said device for controlling the flow through said filtering medium.
Claim 3
Dependent Claim
24 words
The exhaust gas purification device as claimed in claim 1, wherein said throttling valve is responsive to the temperature of said downstream catalytic converter.
Claim 4
Dependent Claim
40 words
The exhaust gas purification device as claimed in claim 1, wherein when the temperature of said downstream catalytic converter is below a predetermined value, said throttling valve is closed so that the exhaust gas flow passes through said filtering medium.
Claim 5
Dependent Claim
44 words
The exhaust gas purification device as claimed in claim 1, wherein when the temperature of said downstream catalytic converter is above a predetermined value, said throttling valve is set to allow a majority of the exhaust gas flow to pass through said throughflow passage.
Claim 6
Dependent Claim
20 words
The exhaust gas purification device as claimed in claim 1, including an upstream catalytic converter upstream of said filtering medium.
Claim 7
Dependent Claim
22 words
The exhaust gas purification device as claimed in claim 5, wherein said upstream catalytic converter is smaller than said downstream catalytic converter.
Claim 8
Dependent Claim
20 words
The exhaust gas purification device as claimed in claim 6, wherein said downstream catalytic converter is housed within said casing.
Claim 9
Dependent Claim
35 words
The exhaust gas purification device as claimed in any one of claims 5 to 4, wherein the exhaust gas flow passes through both said downstream catalytic converter and said upstream catalytic converter at all times.
References Cited (Backward Citations)
US4686827A
Cited
US5097665A
Cited
US5067319A
Cited
US5052178A
Cited
EP0424966A1
Cited
SE468322B
Cited
US5398503A
Cited
US5589143A
Cited
US5467594A
Cited
US5709081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-03 | 2002-02-02 | 2002-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-03 | 2006-02-02 | 2006-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-03 | 2010-02-02 | 2010-08-04 | $7700.00 | Window Closed / Lapsed |