US4709547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the regeneration of engine emission particulates deposited in a particulate trap
Assignee: FEV Europe GmbH
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Filing: 1987-02-18
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Granted: 1987-12-01
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Expires: 2007-02-18
Abstract
Abstract A process for the regeneration of engine emission particulates collected in particulate filter traps associated with each of the engine cylinders, or with groups of such cylinders, includes the selective elevation of the emission temperature of at least one of the cylinders or groups to the extent required for regeneration, by oxidation, of the filter trap or traps associated therewith, by supplying engine fuel to such cylinder or cylinders in a predtermined amount to produce the elevated emission temperature, and supplying the remaining of the cylinders with amounts of engine fuel less than such predetermined amount as required to sustain the given engine power output.
Inventors
- 👤 Franz Pischinger
- 👤 Gerhard Lepperhoff
- 👤 Georg Huthwohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:04
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/008; F02D41/0082; F01; F01N; F01N13/00; F01N13/011; F01N3/00; F01N3/02; F01N3/021; F01N3/023; F01N3/033; F01N3/035; F02M; F02M59/00; F02M59/38; F02M69/00; F02M69/46; F02M69/462; F02M69/465; F01N2430/00; F01N2430/06; F02D41/02; F02D41/021; F02D41/0235; F02D41/027; F02D41/029
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
117 words
In an internal combustion engine having a plurality of engine cylinders operating at a given power output, a process for the regeneration of engine emissio particulates collected in particulate filter traps respectively associated with each of the engine cylinders, comprising the steps of selectively elevating the emission temperature of at least one of the cylinders to the extent required for regeneration, by oxidation, of the filter trap associated therewith, by supplying engine fuel to said at least one of said cylinders in a predetermined amount to produce the elevated emission temperature, and supply the remaining of said cylinders with amounts of engine fuel less than said predetermined amount as required to sustain the given engine power output.
Claim 2
Dependent Claim
117 words
In an internal combustion engine having a plurality of engine cylinders operating at a given power output, a process for the regeneration of engine emissio particulates collected in particulate filter traps respectively associated with each of the engine cylinders, comprising the steps of selectively elevating the emission temperature of at least one of the cylinders to the extent required for regeneration, by oxidation, of the filter trap associated therewith, by supplying engine fuel to said at least one of said cylinders in a predetermined amount to produce the elevated emission temperature, and supply the remaining of said cylinders with amounts of engine fuel less than said predetermined amount as required to sustain the given engine power output.
Claim 3
Dependent Claim
121 words
In an internal combustion engine having more than two engine cylinders operating at a given power output, a process for the regeneration of engine emission particulates collected in particulate filter traps associated with said cylinders, at least one of said traps being associated with at least a pair of said cylinders, comprising the steps of selectively elevating the emission temperature of said pair of cylinders to the extent required for regeneration, by oxidation, of said one filter trap, by supplying said pair of cylinders in a predetermined amount to produce the elevated emission temperature, and supplying the remaining of said cylinders with an amount of engine fuel less than said predetermined amount as required to sustain the given engine power output.
Claim 4
Dependent Claim
121 words
In an internal combustion engine having more than two engine cylinders operating at a given power output, a process for the regeneration of engine emission particulates collected in particulate filter traps associated with said cylinders, at least one of said traps being associated with at least a pair of said cylinders, comprising the steps of selectively elevating the emission temperature of said pair of cylinders to the extent required for regeneration, by oxidation, of said one filter trap, by supplying said pair of cylinders in a predetermined amount to produce the elevated emission temperature, and supplying the remaining of said cylinders with an amount of engine fuel less than said predetermined amount as required to sustain the given engine power output.
Claim 5
Dependent Claim
61 words
The process according to claim 1, wherein the engine has more than two of the engine cylinders, the emission temperature of at least a pair of the cylinders being selectively elevated to the extent required for regeneration of the filter traps associated therewith, by supplying engine fuel to said pair of cylinders in the predetermined amount to effect the elevated temperature.
Claim 6
Dependent Claim
48 words
The process according to claims 1 or 2, wherein the engine has at least four of the engine cylinders, a plurality of said remaining cylinders being supplied with a given amount of engine fuel less than said predetermined amount as required to sustain the given engine power output.
Claim 7
Dependent Claim
29 words
The process according to claim 1 or 2, wherein the engine fuel supplied to effect the elevated emission temperature is at a level to achieve full load engine operation.
Claim 8
Dependent Claim
46 words
The process according to claims 1 or 2, wherein the supplying steps are carried out by injecting unequal amounts of the engine fuel by pumping a constant volume of the fuel through separate nozzles associated with the cylinders, via separate control pistons associated with the nozzles.
Claim 9
Dependent Claim
46 words
The process according to claims 1 or 2, wherein separate pump-nozzle elements are associated with the cylinders, and the supplying steps are carried out by injecting unequal amounts of the engine fuel via the separate elements, and electronically adjusting the timing and duration of the injections.
Claim 10
Dependent Claim
28 words
The process according to claim 6, wherein the control pistons are adjusted electronically for by-passing fuel through the pistons for injecting required amounts of fuel into the cylinders.
Claim 11
Dependent Claim
24 words
The process according to claims 1 or 2, wherein the step of elevating the emission temperature is carried out as a function of time.
Claim 12
Dependent Claim
27 words
The process according to claims 1 or 2, wherein the step of elevating the emission temperature is carried out as a function of engine emission back pressure.
Claim 13
Dependent Claim
34 words
The process according to claims 1 or 2, wherein the step of elevating the emission temperature is carried out as a function of the amount of emission particulates in the filter trap being regenerated.
Claim 14
Dependent Claim
18 words
The process according to claims 1 or 2, wherein the first mentioned supplying step is carried out intermittently.
Claim 15
Dependent Claim
20 words
The process according to claims 1 or 2, wherein the first mentioned supplying step is carried out alternately and intermittently.
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) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |