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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9932938 B1

PDFFull Text
Date of Patent:
Apr. 03, 2018

Filed:

Nov. 23, 2016

Methods and systems for diagnosing an intake oxygen sensor based on pressure

Applicant:

Ford Global Technologies, Llc, Dearborn, MI (US);

Inventors:

Gopichandra Surnilla, West Bloomfield, MI (US);

Yong-Wha Kim, Ann Arbor, MI (US);

Michael James Uhrich, West Bloomfield, MI (US);

Timothy Joseph Clark, Livonia, MI (US);

Assignee:

Ford Global Technologies, LLC, Dearborn, MI (US);

Attorneys:

Julia Voutyras

McCoy Russell LLP

Primary Examiner:

John Kwon

Int. Cl.
CPC ...
B60T 7/12 (2006.01); F02M 26/46 (2016.01); F02M 35/10 (2006.01); F02D 41/00 (2006.01); F02D 41/14 (2006.01); F02D 41/22 (2006.01); F02M 26/16 (2016.01); F02M 26/21 (2016.01); F02M 26/47 (2016.01); F02M 26/52 (2016.01); F02M 26/04 (2016.01); F02B 37/00 (2006.01); F02B 37/007 (2006.01); F02B 37/16 (2006.01); F02B 37/18 (2006.01); F02M 26/05 (2016.01);
U.S. Cl.
CPC ...
F02M 26/46 (2016.02); F02B 37/00 (2013.01); F02D 41/0072 (2013.01); F02D 41/144 (2013.01); F02D 41/1454 (2013.01); F02D 41/1495 (2013.01); F02D 41/222 (2013.01); F02M 26/04 (2016.02); F02M 26/16 (2016.02); F02M 26/21 (2016.02); F02M 26/47 (2016.02); F02M 26/52 (2016.02); F02M 35/10222 (2013.01); F02M 35/10373 (2013.01); F02B 37/007 (2013.01); F02B 37/16 (2013.01); F02B 37/18 (2013.01); F02D 41/1456 (2013.01); F02D 2041/1431 (2013.01); F02M 26/05 (2016.02); Y02T 10/144 (2013.01); Y02T 10/47 (2013.01);
Abstract

Methods and systems are provided for diagnosing an intake oxygen sensor. In one example, a method may include indicating degradation of an intake oxygen sensor based on a first time constant of an output of the intake oxygen sensor and a second time constant of an output of a throttle inlet pressure sensor. The method may further include adjusting EGR flow based on the output of the intake oxygen sensor and the output of the throttle inlet pressure sensor when the intake oxygen sensor is not degraded.

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