David A Farmer

Author:

David W. Farmer

ISBN #:

0821804502

Author:

David W. Farmer

ISBN #:

0821804510

Author:

David H. Farmer

ISBN #:

0273022423

Author:

David H. Farmer

ISBN #:

0273405063

Author:

David H. Farmer

ISBN #:

0521280419

Author:

David H. Farmer

ISBN #:

0434919101

Author:

David H. Farmer

ISBN #:

0470254998

Author:

David H. Farmer

ISBN #:

0716100401

US Patent:

6467259, Oct 22, 2002

Filed:

Jun 19, 2001

Appl. No.:

09/884563

Inventors:

Gopichandra Surnilla - West Bloomfield MI
David George Farmer - Plymouth MI

Assignee:

Ford Global Technologies, Inc. - Dearborn MI

International Classification:

F01N 300

US Classification:

60285, 60274, 60286, 60297

Abstract:

An exhaust gas treatment system for an internal combustion engine includes a pair of upstream emission control devices which respectively receive the exhaust gas generated by a respective group of cylinders, and a single, shared downstream emission control device receiving catalyzed exhaust gas from each of the upstream emission control devices. After the downstream device stores a selected constituent gas generated when each cylinder group is operating âlean,â the downstream device is purged by operating the first cylinder group with a stoichiometric air-fuel mixture while operating the second cylinder group with a rich air-fuel mixture, such that the combined catalyzed exhaust gas flowing through the downstream device during the purge event has an air-fuel ratio slightly rich of stoichiometry. As a result, the invention improves overall vehicle fuel economy because only one of the upstream devices is purged of stored oxygen when purging the downstream device of previously-stored constituent gas.

US Patent:

6490860, Dec 10, 2002

Filed:

Jun 19, 2001

Appl. No.:

09/884331

Inventors:

David George Farmer - Plymouth MI
Gopichandra Surnilla - West Bloomfield MI
Michael John Cullen - Northville MI

Assignee:

Ford Global Technologies, Inc. - Dearborn MI

International Classification:

F01N 300

US Classification:

60285, 60274, 60295, 60297, 60276

Abstract:

A method and system for controlling the operation of an internal combustion engine, wherein exhaust gas generated by the engine is directed through an emission control device, includes determining instantaneous rates of storage for a constituent of the exhaust gas, such as NO , as well as the capacity reduction of the device to store the exhaust gas constituent as a function of a calculated value representing an amount of SO which has accumulated in the device since a prior device-regeneration (desulfation) event. The calculated accumulated SO value is also preferably used to schedule a device-regeneration event, as when the calculated accumulated SO value exceeds a predetermined threshold value.

US Patent:

6539706, Apr 1, 2003

Filed:

Jun 19, 2001

Appl. No.:

09/884557

Inventors:

David George Farmer - Plymouth MI
Gopichandra Surnilla - West Bloomfield MI

Assignee:

Ford Global Technologies, Inc. - Dearborn MI

International Classification:

F01N 300

US Classification:

60285, 60276, 60274, 701109

Abstract:

An exhaust gas treatment system for an internal combustion engine includes a three-way catalyst and a NO device located downstream of the three-way catalyst. The device is preconditioned for emissions reduction at engine operating conditions about stoichiometry by substantially filling the device with oxygen and NO ; and purging stored oxygen and stored NO from only an upstream portion of the device, whereupon the upstream portion of the device operates to store oxygen and NO during subsequent lean transients while the downstream portion of the device operates to reduce excess HC and CO during subsequent rich transients.

US Patent:

6604504, Aug 12, 2003

Filed:

Jun 19, 2001

Appl. No.:

09/884383

Inventors:

Gopichandra Surnilla - West Bloomfield MI
David George Farmer - Plymouth MI

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F02B 1700

US Classification:

123295, 123443, 123673

Abstract:

An exhaust treatment system for an internal combustion engine includes a catalytic emission control device. When transitioning the engine between a lean operating condition and a stoichiometric operating condition, as when scheduling a purge of the downstream device to thereby release an amount of a selected exhaust gas constituent, such as NO , that has been stored in the downstream device during the lean operating condition, the air-fuel ratio of the air-fuel mixture supplied to each cylinder is sequentially stepped from an air-fuel ratio of at least about 18 to the stoichiometric air-fuel ratio. The purge event is preferably commenced when all but one cylinders has been stepped to stoichiometric operation, with the air-fuel mixture supplied to the last cylinder being stepped immediately to an air-fuel ratio rich of a stoichiometric air-fuel ratio.

US Patent:

6650991, Nov 18, 2003

Filed:

Jun 19, 2001

Appl. No.:

09/884764

Inventors:

David George Farmer - Plymouth MI
Gopichandra Surnilla - West Bloomfield MI

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F02M 3704

US Classification:

701104, 701109, 701108, 60276

Abstract:

A vehicle exhaust treatment system includes an emission control device featuring at least one upstream NO -storing âbrick,â and a downstream NO -storing âbrickâ that is substantially smaller in nominal capacity than the upstream brick. An oxygen sensor positioned between the upstream and downstream bricks generates an output signal representing the concentration of oxygen in the device. A controller selects a rich operating condition to purge the device of stored NO , and deselects the rich, NO -purging engine operating condition in response to the sensor output signal, preferably after an additional time delay calculated to provide sufficient excess hydrocarbons to release substantially all stored NO from the downstream brick.

US Patent:

6651621, Nov 25, 2003

Filed:

Dec 6, 2001

Appl. No.:

10/004036

Inventors:

David George Farmer - Plymouth MI
David Oshinsky - Trenton MI

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F02D 100

US Classification:

123396, 123399, 73116

Abstract:

A closed throttle position of a vehicle internal combustion engine is determined by storing a plurality of signal values representative of previous foot-off position values of an accelerator pedal ( ) within a normal range of pedal positions, determining a current foot-off position value of the accelerator pedal, comparing the current foot-off position value to an average of the previous stored foot-off position values, and using the average as the closed pedal position to determine a closed throttle position when the comparison is indicative of an abnormal pedal position.

US Patent:

6735937, May 18, 2004

Filed:

Oct 5, 2001

Appl. No.:

09/971453

Inventors:

Gopichandra Sumilla - Westland MI
Jing Sun - Bloomfield MI
David George Farmer - Plymouth MI
Ilya V. Kolmanovsky - Ypsilanti MI

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F01N 300

US Classification:

60274, 60285, 60286, 123 9015, 123443, 123692

Abstract:

A control method for an internal combustion engine has multiple cylinder groups with at least one control device positioned between an intake manifold and a cylinder group. The engine operates the cylinder groups at different air/fuel ratio and uses the control device to balance torque produced by the different cylinder groups. In one aspect of the invention, one cylinder group is operated rich and another cylinder group is operated lean thereby providing heat to an exhaust system located downstream of the engine.

US Patent:

6751567, Jun 15, 2004

Filed:

Nov 26, 2001

Appl. No.:

09/995076

Inventors:

David George Farmer - Plymouth MI
David Oshinsky - Trenton MI
Edward Badillo - South Lyon MI

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

G01K 1500

US Classification:

702 99, 702 94

Abstract:

A system ( ) and method for determining the closed position of a throttle plate of an internal combustion engine ( ) are provided. The system ( ) includes a throttle sensor ( ), a temperature sensor ( or ), and an electronic control unit (ECU) ( ). The throttle sensor ( ) generates a signal indicative of the position of the throttle plate ( ). The temperature sensor ( or ) generates a signal indicative of the temperature of a throttle body ( ) of the engine ( ). The ECU ( ) is configured to select one of a first closed position value indicated by throttle sensor ( ) signal and a second closed position value retrieved from a memory ( ) responsive to the measured temperature. The inventive system is able to minimize inaccuracies in throttle plate position detection by eliminating errors resulting from a change in geometry between the throttle plate ( ) and the throttle body ( ) of the engine during relatively high temperatures.