US5042248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the regeneration of a soot-particle filter in an internal-combustion engine
Assignee: Daimler Benz AG
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Filing: 1990-04-12
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Granted: 1991-08-27
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Expires: 2010-04-12
Abstract
Abstract An apparatus for the regeneration of a soot-particle filter is located in the exhaust-gas line of an air-compression, fuel-injected internal-combustion engine. The apparatus regenerates the filter using a process which burns off the soot particles in the filter. A device in the intake line is actuable as a function of the engine load and engine speed and controls the cross-section of the intake line. To prevent damage to the soot-particle filter body during a transition of the internal-combustion engine into the deceleration mode, immediately after the transition into the deceleration mode of the internal-combustion engine, the process and apparatus move the device for controlling the intake-line cross-section first out of its open position into a position to reduce the line cross-section to a minimum and thereafter continuously into its open position.
Inventors
- 👤 Jorg Abthoff
- 👤 Hans-Dieter Schuster
- 👤 Hans-Joachim Langer
- 👤 Erwin Strohmer
- 👤 Rolf Gabler
- 👤 Roland Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:19
CPC Classifications
F; F02; F02D; F02D35/00; F02D35/0015; F02D35/0023; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/023; F02D9/00; F02D9/02; F01N2390/00; F01N2390/06; F02B; F02B3/00; F02B3/06; F02D2009/0201; F02D2009/0235
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
A process for the regeneration of a soot-particle filter in an exhaust-gas line of an air-compression fuel-injected internal-combustion engine by the burning off of the soot particles comprising the steps of: controlling a cross-section of an intake line as a function of engine load and engine speed between an open position of the line and a reduced cross-section of the line, reducing the cross-section of the intake line to a minimum during a deceleration mode of the engine, and immediately after transition into the deceleration mode of the engine, controlling the cross-section of the intake line such that the cross section is changed from the open position to the minimum cross-section and thereafter gradually to the open position.
Claim 2
Dependent Claim
118 words
A process for the regeneration of a soot-particle filter in an exhaust-gas line of an air-compression fuel-injected internal-combustion engine by the burning off of the soot particles comprising the steps of: controlling a cross-section of an intake line as a function of engine load and engine speed between an open position of the line and a reduced cross-section of the line, reducing the cross-section of the intake line to a minimum during a deceleration mode of the engine, and immediately after transition into the deceleration mode of the engine, controlling the cross-section of the intake line such that the cross section is changed from the open position to the minimum cross-section and thereafter gradually to the open position.
Claim 3
Dependent Claim
43 words
The process according to Claim 1, wherein the step of controlling includes changing the cross-section of the intake line abruptly to its open position in the event of a preset load being reached or a decrease of engine speed below a predetermined value.
Claim 4
Dependent Claim
18 words
Process according to Claim 1, wherein the cross-section of the intake line is maximum in the open position.
Claim 5
Independent Claim
162 words
An apparatus for regenerating a soot-particle filter in an exhaust-gas line of an internal combustion engine, comprising: means operatively arranged in an intake-line of the engine for controlling a cross-section of the intake line, a vacuum cell operatively associated with the controlling means, a vacuum pump having an adjustable delivery volume shiftable to maximum delivery during transition of the engine to a deceleration mode and to zero delivery after the cross-section reaches a minimum value, a pneumatic line system connecting the vacuum pump with the vacuum cell, a shut-off valve arranged in the pneumatic line system so as to be moved from a closed position to an open position at the transition of the engine to the deceleration mode and from the open position to a closed position when the minimum value of the cross-section is reached, and a ventilating valve arranged between the shut-off valve and the vacuum cell so as to be closed during the transition into the deceleration mode.
Claim 6
Independent Claim
162 words
An apparatus for regenerating a soot-particle filter in an exhaust-gas line of an internal combustion engine, comprising: means operatively arranged in an intake-line of the engine for controlling a cross-section of the intake line, a vacuum cell operatively associated with the controlling means, a vacuum pump having an adjustable delivery volume shiftable to maximum delivery during transition of the engine to a deceleration mode and to zero delivery after the cross-section reaches a minimum value, a pneumatic line system connecting the vacuum pump with the vacuum cell, a shut-off valve arranged in the pneumatic line system so as to be moved from a closed position to an open position at the transition of the engine to the deceleration mode and from the open position to a closed position when the minimum value of the cross-section is reached, and a ventilating valve arranged between the shut-off valve and the vacuum cell so as to be closed during the transition into the deceleration mode.
Claim 7
Dependent Claim
21 words
The apparatus according to Claim 4, wherein the controlling means for the cross-section of the intake line is a throttle flap.
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) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |