Patrick J Mccourt

US Patent:

6432287, Aug 13, 2002

Filed:

Mar 1, 2000

Appl. No.:

09/516814

Inventors:

Mark E. McMackin - Royal Oak MI
Rama Madugula - Troy MI
Patrick T McCourt - Auburn Hills MI
Anthony R Mrosewske - Troy MI

Assignee:

DaimlerChrysler Corporation - Auburn Hills MI

International Classification:

F01N 1100

US Classification:

204424, 73 2331, 60276, 123697, 374142, 374144, 374164

Abstract:

A device provided in an exhaust system of an internal combustion engine in order to detect exhaust gas temperature. The device includes an oxygen sensor which has a sense element outboard of a heater element. The oxygen sensor is further designed to incorporate a temperature sensing element on the outboard of the sense element. The temperature sensing element optimizes the detection of the exhaust gas temperature, thereby providing efficient operation of the engine.

US Patent:

61488046, Nov 21, 2000

Filed:

Nov 22, 1999

Appl. No.:

9/447136

Inventors:

William B. Blomquist - Lake Orion MI
Sandra N. Thomson - Rochester Hills MI
Patrick T. McCourt - Auburn Hills MI
Yi Cheng - Jackson MI

Assignee:

DaimlerChrysler Corporation - Auburn Hills MI

International Classification:

F02M 3704

US Classification:

123520

Abstract:

A method of controlling a proportional purge solenoid is provided to improve low flow resolution. The method includes looking-up a primary duty cycle corresponding to purge current in a three-dimensional surface by using purge flow and vacuum level as inputs. Should the primary duty cycle fall below a lowest allowable purge current threshold value, a secondary purge duty cycle (i. e. , an on/off pattern of the primary duty cycle) is obtained from a two-dimensional table by using the actual calculated purge flow as an input. The two-dimensional table includes a sequence of program loops subdivided into a delay region wherein the purge flow and vacuum level data are learned, an updating region wherein the purge current of the three-dimensional surface is updated, and a control region wherein the primary duty cycle is toggled between on and off states. When the current program loop falls within the delay region, a recorded primary duty cycle is output. When the current program loop falls within the updating region, the primary duty cycle is applied at a time determined during the last program sequence.

US Patent:

59505990, Sep 14, 1999

Filed:

Oct 29, 1997

Appl. No.:

8/959791

Inventors:

William D. Rotramel - Plymouth MI
Yi Cheng - Jackson MI
Mark E. Hope - Ann Arbor MI
Shean Huff - Ann Arbor MI
Mary Joyce - Farmington Hills MI
Howard W. Krausman - Dexter MI
Richard K. Moote - Ann Arbor MI
John M. Prevost - Jackson MI
Gary L. Seitz - Chelsea MI
Patrick T. McCourt - Auburn Hills MI

Assignee:

Chrysler Corporation - Auburn Hills MI

International Classification:

F02M 700

US Classification:

123436

Abstract:

The present invention is directed towards a method of controlling combustion parameters of an internal combustion engine prior to oxygen sensor feedback availability for a flexible fueled vehicle. If the vehicle has previously been running on ethanol or has been using ethanol in the recent past, a first strategy is employed which basis engine fueling on the minimum of a theoretically appropriate fueling value and a theoretically calculated value. If the vehicle has not previously been running on ethanol or has not been using ethanol in the recent past, a second strategy is employed which basis engine fueling on the minimum of the theoretically appropriate fueling value, the theoretically calculated value and a roughness calculated value.