Benjamin G Radke

US Patent:

8640441, Feb 4, 2014

Filed:

Jun 7, 2012

Appl. No.:

13/490868

Inventors:

Vincent J. Tylutki - Livonia MI, US
Benjamin Radke - Waterford MI, US
Janean E. Kowalkowski - Northville MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F01N 3/00

US Classification:

60276, 60277, 7386142

Abstract:

A method of monitoring a differential pressure sensor of an exhaust gas aftertreatment system includes sensing a learned value (n−1, n, n+1, n+2, etc. ) of the differential pressure sensor for each after-run occurrence of the vehicle, and calculating an absolute value of a rate of change between a current (n) learned value of the differential pressure sensor and a previous (n−1) learned value of the differential pressure sensor. The absolute value of the rate of change is compared to a threshold pressure value to determine if the absolute value of the rate of change is greater than the threshold pressure value or is less than the threshold pressure value. A fault in the differential pressure sensor is signaled when the absolute value of the rate of change of the learned values is greater than the threshold pressure value.

US Patent:

20120291629, Nov 22, 2012

Filed:

May 19, 2011

Appl. No.:

13/111401

Inventors:

Vincent J. Tylutki - Livonia MI, US
Janean E. Kowalkowski - Northville MI, US
Benjamin Radke - Waterford MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

B01D 35/143

US Classification:

95 23, 96421, 96420, 95 25

Abstract:

A system for a vehicle includes a regeneration module and a disconnection indication module. The regeneration module indicates when a regeneration of a particulate filter is complete. The disconnection indication module receives a pressure difference across the particulate filter measured using delta pressure sensor. The delta pressure sensor generates the pressure difference based on first and second pressures upstream and downstream of the particulate filter applied to the delta pressure sensor using upstream and downstream pressure lines, respectively. In response to an indication that the regeneration of the particulate filter is complete, the disconnection indication module selectively indicates that the downstream pressure line is disconnected based on a comparison of the pressure difference and a predetermined pressure.

US Patent:

20130139490, Jun 6, 2013

Filed:

Dec 1, 2011

Appl. No.:

13/309287

Inventors:

Vincent J. Tylutki - Livonia MI, US
Janean E. Kowalkowski - Northville MI, US
Benjamin Radke - Waterford MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

F01N 11/00
G01N 25/00
G06F 19/00

US Classification:

60277, 702 30

Abstract:

In one embodiment of the invention, a method for determining an exhaust system condition includes determining if a reaction in an oxidation catalyst is performing acceptably based on a determined temperature of the exhaust gas flowing from the oxidation catalyst and determining a temperature of the exhaust gas flowing from a particulate filter. The method further includes determining a temperature of the exhaust gas flowing into the oxidation catalyst, determining an exhaust system condition based on a first difference between the temperature of the exhaust gas flowing from the particulate filter and the temperature of the exhaust gas flowing from the oxidation catalyst and a second absolute difference between the temperature of the exhaust gas flowing from the oxidation catalyst and the temperature of the exhaust gas flowing into the oxidation catalyst and communicating a signal to identify the determined exhaust system condition.

US Patent:

20130180229, Jul 18, 2013

Filed:

Jan 18, 2012

Appl. No.:

13/352718

Inventors:

Benjamin Radke - Waterford MI, US
Vincent J. Tylutki - Livonia MI, US
Janean E. Kowalkowski - Northville MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

F01N 11/00
F01N 3/00

US Classification:

60273, 60277

Abstract:

A method of detecting a thermal event is provided that relies not only on monitored exhaust temperatures, but also on temperature gradients propagating in the direction of exhaust flow. Specifically, the method of detecting a thermal event in a vehicle exhaust system includes monitoring at least one operating parameter at multiple locations spaced in exhaust flow of the vehicle exhaust system. The method then includes initiating a protective action if the monitoring indicates that at least one respective predetermined temperature requirement and a respective predetermined temperature gradient requirement are exceeded at two of the multiple temperature sensor locations within a predetermined time period.

US Patent:

20140069081, Mar 13, 2014

Filed:

Sep 12, 2012

Appl. No.:

13/611368

Inventors:

Vincent J. Tylutki - Livonia MI, US
Benjamin Radke - Waterford MI, US
Janean E. Kowalkowski - Northville MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

F01N 11/00
F01N 3/021

US Classification:

60274, 60311

Abstract:

A vehicle includes an engine, an exhaust system having a particulate filter which removes soot from the exhaust stream, a sensor, and a controller. The sensor measures instantaneous differential pressure across the filter. The controller executes a method to selectively enable or disable execution of an efficiency diagnostic of the filter as a function of a learned differential pressure offset value. The controller may also compare the differential pressure to a calibrated threshold and execute a control action when the differential pressure falls within an allowable range of the threshold. This may include applying the differential pressure offset value and enabling execution of the diagnostic using measurements from the zeroed sensor. Another control action may be executed when the measured differential pressure is not within the allowable range of the threshold, including disabling the execution of the diagnostic and setting a diagnostic code indicating that the sensor may be faulty.

US Patent:

20150068193, Mar 12, 2015

Filed:

Sep 10, 2013

Appl. No.:

14/022918

Inventors:

- Detroit MI, US
Benjamin Radke - Waterford MI, US
Vincent J. Tylutki - Livonia MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F01N 3/021

US Classification:

60274, 60297

Abstract:

An exhaust treatment system includes a particulate filter having a filter substrate configured to trap soot contained in exhaust gas. A regeneration system is configured to perform a regeneration operation that regenerates the particulate filter by burning away soot stored in the filter substrate. A control module is in electrical communication with the regeneration system to generate a first control signal that initiates the regeneration operation based on a comparison between at least one operating condition of the exhaust treatment system and a threshold value. The control module generates a second control signal in response to detecting at least one diagnostic signal. The second control signal initiates the regeneration operation independently of the comparison.

US Patent:

20150040539, Feb 12, 2015

Filed:

Aug 7, 2013

Appl. No.:

13/961239

Inventors:

- Detroit MI, US
Benjamin Radke - Waterford MI, US
Janean E. Kowalkowski - Northville MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F01N 3/025
F01N 11/00

US Classification:

60274, 60311

Abstract:

An exhaust gas treatment system includes a particulate filter to collect particulate matter from exhaust gas flowing therethrough. A regeneration module performs a regeneration operation that regenerates the particular filter. The regeneration operation generates an exothermic event which heats the particulate filter above a target temperature that burns the particulate matter. At least one temperature sensor is disposed adjacent the particular filter to determine at least one temperature of the exhaust gas. The exhaust gas treatment system further includes a temperature diagnostic module to determine a temperature profile of the particulate filter based on the temperature of the exhaust gas. The temperature diagnostic module further determines a temperature deviation of the particulate filter based on a comparison between the temperature profile and a target temperature. The temperature diagnostic module diagnoses the regeneration operation based on a plurality of temperature deviations and a selected time period.

US Patent:

20140366515, Dec 18, 2014

Filed:

Jun 13, 2013

Appl. No.:

13/916842

Inventors:

- Detroit MI, US
Vincent J. Tylutki - Livonia MI, US
Benjamin Radke - Waterford MI, US
Manoharan Thiagarajan - Milford MI, US

International Classification:

F01N 3/021
G01M 15/10

US Classification:

60311, 7311476

Abstract:

An exhaust gas treatment system includes a particulate filter to collect particulate matter from exhaust gas flowing therethrough. The particulate filter realizes a pressure thereacross in response to the exhaust gas flow. A delta pressure sensor determines a first pressure upstream from the particulate filter and a second pressure downstream from the particulate filter. A delta pressure module is in electrical communication with the delta pressure sensor. The delta pressure module determines a pressure differential value based on a difference between the first pressure and the second pressure and generates a diagnostic signal based on a plurality of the pressure differential values and a predetermined time period.