Particulate filter device monitoring system for an engine

• US 10,132,256 B2
• Filed: 05/10/2013
• Issued: 11/20/2018
• Est. Priority Date: 05/10/2013
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Swoish, Christopher C., Whitt, Christopher
• Primary Examiner(s): Laurenzi, Mark
• Assistant Examiner(s): Sheppard, Jason
• Application Number:
  US13/891,875
• Publication Number:
  US 20140331654A1
• Time in Patent Office: 2,020 Days
• CPC Class Codes: F01N 13/009 having two or more separate purifying devices arranged in series
• CPC Class Codes: F01N 13/0093 the purifying devices are of the same type
• CPC Class Codes: F01N 2330/06 Ceramic, e.g. monoliths
• CPC Class Codes: F01N 2550/04 Filtering activity of particulate filters
• CPC Class Codes: F01N 2560/06 the means being a temperature sensor
• CPC Class Codes: F01N 2560/14 having more than one sensor of one kind
• CPC Class Codes: F01N 2900/1606 Particle filter loading or soot amount
• CPC Class Codes: F01N 3/0222 the structure being monolithic, e.g. honeycombs
• CPC Class Codes: F01N 3/106 Auxiliary oxidation catalysts
• CPC Class Codes: F01N 3/2066 Selective catalytic reduction [SCR]
• CPC Class Codes: F01N 9/002 of filter regeneration, e.g. detection of clogging
• CPC Class Codes: F01N 9/005 using models instead of sensors to determine operating characteristics of exhaust systems, e.g. calculating catalyst temperature instead of measuring it directly
• CPC Class Codes: F02D 2200/0812 Particle filter loading
• CPC Class Codes: F02D 41/029 the exhaust gas treating apparatus being a particulate filter
• CPC Class Codes: F02D 41/08 for idling F02D41/06, F02D41/16 take precedence
• CPC Class Codes: F02D 41/1445 the characteristics being related to the exhaust flow
• CPC Class Codes: G01N 15/06 Investigating concentration of particle suspensions by weighing G01N5/00; investigating sedimentation of particle suspensions G01N15/04; investigating individual particles G01N15/10
• CPC Class Codes: G01N 2015/084 Testing filters
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A particulate filter device monitoring system for an engine includes a regeneration mode trigger module configured to set a regeneration request based on soot accumulation in the particulate filter device, a regeneration control module configured to control regeneration of the particulate filter device, and a soot out model module including a soot out model configured to calculate changes in soot out rate during prolonged engine idling periods.

Claims

1. A particulate filter device monitoring system for an engine comprising:

a particulate filter device including at least one sensor;

a regeneration mode trigger module configured to set a regeneration request based on soot accumulation in the particulate filter device based on signals received from the at least one sensor;

a regeneration control module configured to control regeneration of the particulate filter device; and

a soot out model module including a soot out model configured to calculate changes in a soot out rate during an extended engine idle period.

2. The particulate filter device monitoring system according to claim 1, wherein the soot out model module includes an extended idle correction factor that corrects for soot out error during the extended engine idle period.

3. The particulate filter device monitoring system according to claim 2, wherein the extended idle correction factor comprises a multiplier configured to adjust the soot out model to account for a substantially exponential change in the soot out rate during the extended engine idle period.

4. The particulate filter device monitoring system according to claim 1, further comprising:

a soot accumulation register operably connected with the regeneration control module, the soot accumulation register being configured to store an amount of soot in a particulate filter calculated by the soot out model module.

5. The particulate filter device monitoring system according to claim 4, further comprising:

a regeneration mode switch configured to signal the regeneration mode trigger module to initiate a regeneration mode based on the amount of soot in the particulate filter calculated by the soot out model module.

6. An internal combustion engine comprising:

an engine including an exhaust gas conduit;

a particulate filter device fluidically connected to the exhaust gas conduit; and

a particulate filter device monitoring system having a control module configured to monitor a soot accumulation in the particulate filter device and implement a regeneration mode, the control module comprising;

a regeneration mode trigger module configured to set a regeneration request based on the soot accumulation in the particulate filter device;

a regeneration control module configured to control regeneration of the particulate filter device; and

a soot out model module including a soot out model configured to calculate changes in a soot out rate during an extended engine idle period.

7. The internal combustion engine according to claim 6, wherein the soot out model module includes an extended idle correction factor that corrects for soot out error during the extended engine idle period.

8. The internal combustion engine according to claim 7, wherein the extended idle correction factor comprises a multiplier configured to adjust the soot out model to account for a substantially exponential change in the soot out rate during the extended engine idle period.

9. The internal combustion engine according to claim 6, further comprising:

a soot accumulation register operably connected with the regeneration control module, the soot accumulation register being configured to store an amount of soot in a particulate filter calculated by the soot out model module.

10. The internal combustion engine according to claim 9, further comprising:

a regeneration mode switch configured to signal the regeneration mode trigger module to initiate a regeneration mode based on the amount of soot in the particulate filter calculated by the soot out model module.