US5456079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the thermal regeneration of particle filters for diesel engine exhaust gas
Assignee: Eberspaecher Climate Control Systems GmbH and Co KG
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Filing: 1994-05-20
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Granted: 1995-10-10
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Expires: 2014-05-20
Abstract
Abstract A device for thermal regeneration of particle filters is provided for use with a diesel engine exhaust system with a particle filter. The device includes a burner for heating the particle filter during regeneration of the particle filter. A combustion air supply is provided connected to the burner for supplying combustion air. A fuel pump arrangement is provided preferably including plural pumps which are individually actuatable to deliver fuel dependent on the speed and load condition of the diesel engine.
Inventors
- 👤 Herbert Langen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:55
CPC Classifications
F; F01; F01N; F01N9/00; F01N9/002; F01N3/00; F01N3/02; F01N3/021; F01N3/023; F01N3/025; F02; F02B; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
129 words
A device for thermal regeneration of an exhaust gas particle filter of a diesel engine, the device comprising: a burner connected to the particle filter for heating the particle filter during regeneration thereof; combustion air supply means for supplying combustion air to said burner; fuel pump means for supplying fuel to said burner, said fuel pump means including a plurality of fuel pumps; and a control unit for sensing the speed and load condition of the diesel engine and controlling said pump means to vary a number of fuel pumps in operation, depending on the load condition of said diesel engine and controlling each of said pumps in operation to supply a quantity of fuel per unit time that is substantially proportional to the speed of the diesel engine.
Claim 2
Independent Claim
129 words
A device for thermal regeneration of an exhaust gas particle filter of a diesel engine, the device comprising: a burner connected to the particle filter for heating the particle filter during regeneration thereof; combustion air supply means for supplying combustion air to said burner; fuel pump means for supplying fuel to said burner, said fuel pump means including a plurality of fuel pumps; and a control unit for sensing the speed and load condition of the diesel engine and controlling said pump means to vary a number of fuel pumps in operation, depending on the load condition of said diesel engine and controlling each of said pumps in operation to supply a quantity of fuel per unit time that is substantially proportional to the speed of the diesel engine.
Claim 3
Dependent Claim
22 words
A device according to claim 1, wherein at least one of said plurality of fuel pumps is an electromagnetically driven metering pump.
Claim 4
Dependent Claim
37 words
A device according to claim 1, wherein said combustion air supply means comprises a compressor connected to said diesel engine for delivering a combustion air quantity to said burner dependent on a speed of said diesel engine.
Claim 5
Dependent Claim
26 words
A device according to claim 3, wherein said compressor delivers a quantity of combustion air which is substantially proportional to a speed of said diesel engine.
Claim 6
Dependent Claim
29 words
A device according to claim 3, wherein said compressor is mechanically connected to said diesel engine for operating at a speed proportional to said speed of said diesel engine.
Claim 7
Dependent Claim
33 words
A device according to claim 1, further comprising: a controllable valve connected to said combustion air supply means for controlling a quantity of combustion air flowing to said burner per unit of time.
Claim 8
Dependent Claim
67 words
A device according to claim 1, wherein a gas temperature sensor is connected to said particle filter for sensing a gas temperature in said particle filter, said control unit being connected to said gas temperature sensor and being connected to each of said plurality of pumps for changing the operation of selected ones of said plural pumps dependent on gas temperatures sensed by said gas temperatures sensor.
Claim 9
Dependent Claim
68 words
A device according to claim 6, wherein a gas temperature sensor is connected to said particle filter for sensing a gas temperature in said particle filter, said control unit being connected to said gas temperature sensor and being connected to said controllable valve for changing the quantity of combustion air delivered by said combustion air supply means depending upon the gas temperature sensed by said gas temperature sensor.
Claim 10
Independent Claim
148 words
A device for thermal regeneration of an exhaust gas particle filter of a diesel engine, the device comprising: a burner connected to the particle filter for heating the particle filter during regeneration thereof; combustion air supply means for supplying combustion air to said burner; fuel pump means for supplying fuel to said burner, said fuel pump means including a plurality of fuel pumps: sensing means for sensing the speed and load condition of said diesel engine and generating engine speed and load condition signals; and a control means receiving said engine speed and load condition signals and controlling said pump means to vary a number of fuel pumps in operation, depending on the load condition of said diesel engine, and controlling each of said pumps in operation to supply a quantity of fuel per unit of time that is substantially proportional to the speed of said diesel engine.
Claim 11
Independent Claim
148 words
A device for thermal regeneration of an exhaust gas particle filter of a diesel engine, the device comprising: a burner connected to the particle filter for heating the particle filter during regeneration thereof; combustion air supply means for supplying combustion air to said burner; fuel pump means for supplying fuel to said burner, said fuel pump means including a plurality of fuel pumps: sensing means for sensing the speed and load condition of said diesel engine and generating engine speed and load condition signals; and a control means receiving said engine speed and load condition signals and controlling said pump means to vary a number of fuel pumps in operation, depending on the load condition of said diesel engine, and controlling each of said pumps in operation to supply a quantity of fuel per unit of time that is substantially proportional to the speed of said diesel engine.
Claim 12
Dependent Claim
17 words
A device according to claim 9, wherein said fuel pumps are each an electromagnetically driven metering pump.
Claim 13
Dependent Claim
37 words
A device according to claim 9, wherein said combustion air supply means comprises a compressor connected to said diesel engine for delivering a combustion air quantity to said burner dependent on a speed of said diesel engine.
Claim 14
Dependent Claim
26 words
A device according to claim 11, wherein said compressor delivers a quantity of combustion air which is substantially proportional to a speed of said diesel engine.
Claim 15
Dependent Claim
29 words
A device according to claim 11, wherein said compressor is mechanically connected to said diesel engine for operating at a speed proportional to said speed of said diesel engine.
Claim 16
Dependent Claim
33 words
A device according to claim 9, further comprising: a controllable valve connected to said combustion air supply means for controlling a quantity of combustion air flowing to said burner per unit of time.
Claim 17
Dependent Claim
67 words
A device according to claim 9, wherein a gas temperature sensor is connected to said particle filter for sensing a gas temperature in said particle filter, said control unit being connected to said gas temperature sensor and being connected to each of said plurality of pumps for changing the operation of selected ones of said plural pumps dependent on gas temperatures sensed by said gas temperatures sensor.
Claim 18
Dependent Claim
68 words
A device according to claim 15, wherein a gas temperature sensor is connected to said particle filter for sensing a gas temperature in said particle filter, said control unit being connected to said gas temperature sensor and being connected to said controllable valve for changing the quantity of combustion air delivered by said combustion air supply means depending upon the gas temperature sensed by said gas temperature sensor.
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) | 1998-10-09 | 1999-04-10 | 1999-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-09 | 2003-04-10 | 2003-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-09 | 2007-04-10 | 2007-10-10 | $7700.00 | Window Closed / Lapsed |