Method for regenerating an exhaust aftertreatment system

• US 20050166580A1
• Filed: 12/08/2004
• Published: 08/04/2005
• Est. Priority Date: 02/02/2004
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Wirth, Ralf, Hauber, Thomas, Pfaeffle, Andreas, Lueders, Hartmut, Wuest, Marcel
• Granted Patent: US 8,015,805 B2
• Time in Patent Office: Days
• US Class Current: 60/295
• CPC Class Codes: F01N 3/023 using means for regenerating the filters, e.g. by burning trapped particles by electrically controlling the supply of combustible mixture or its constituents only F02D41/0235
• CPC Class Codes: F01N 3/0871 Regulation of absorbents or adsorbents, e.g. purging by electrically controlling the supply of combustible mixture or its constituents only F02D41/0235
• CPC Class Codes: F01N 9/002 of filter regeneration, e.g. detection of clogging
• CPC Class Codes: F02D 2200/0802 Temperature of the exhaust gas treatment apparatus
• CPC Class Codes: F02D 2200/701 Information about vehicle position, e.g. from navigation system or GPS signal
• CPC Class Codes: F02D 41/029 the exhaust gas treating apparatus being a particulate filter
• CPC Class Codes: F02D 41/405 with post injections
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A method for regenerating an exhaust aftertreatment system, in particular a particulate filter of an internal combustion engine, situated in a vehicle, having regeneration cycles controlled by a control device. An optimized regeneration of the exhaust aftertreatment system is achieved by supplying information relating to the travel route to the control device and controlling the regeneration cycles, taking the information into consideration.

Claims

1. A method for regenerating an exhaust aftertreatment system of an internal combustion engine, situated in a vehicle, the method comprising:

supplying information relating to a travel distance to a control device; and

controlling, by the control device, regeneration cycles as a function of the information.

2. The method according to claim 1, wherein the exhaust aftertreatment system includes a particulate filter.

3. The method according to claim 1, wherein the information is supplied by at least one of a global positioning system, a traffic telematics system, a travel distance computer and a navigation system.

4. The method according to claim 1, further comprising extracting the information from more general travel distance data by one of the control device and a computational unit connected upstream.

5. The method according to claim 1, further comprising determining at least one of the information and travel distance data one of (a) before a start of a trip and (b) in real time during the trip.

6. The method according to claim 1, further comprising:

determining, in the control device, as a function of the information, whether a regeneration operation, provided on the basis of a regeneration request of the exhaust aftertreatment system, is given priority or delayed; and

modifying the regeneration cycle as a function of a result of the determination.

7. The method according to claim 1, further comprising determining, in the control device, as a function of the information, whether a modified regeneration operation is implemented.

8. The method according to claim 1, further comprising processing and routing one of the information and travel distance data to the control device via a bus.

9. The method according to claim 1, wherein the information contains data concerning at least one of:

uphill grades, downhill grades, exhaust gas-critical stretches and traffic jams.

10. The method according to claim 9, wherein at least one of:

(a) a higher temperature of the internal combustion engine on an uphill grade is included for a regeneration operation, and

(b) a regeneration operation is at least one of delayed, given priority and shortened based on an optimization strategy in the case of one of an approaching downhill grade and an exhaust gas-critical stretch.