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.:
Date of Patent:
May. 01, 2018
Filed:
Nov. 06, 2013
Ford Global Technologies, Llc, Dearborn, MI (US);
Gopichandra Surnilla, West Bloomfield, MI (US);
James Alfred Hilditch, Canton, MI (US);
Matthew John Gerhart, Dearborn Heights, MI (US);
Lynn Aimee Chesney, Flat Rock, MI (US);
Stephen B. Smith, Livonia, MI (US);
Ford Gloabl Technologies, LLC, Dearborn, MI (US);
Abstract
Methods and systems are provided for estimating a positive crankcase ventilation (PCV) flow based on outputs of an intake manifold oxygen sensor. For example, during engine operation when exhaust gas recirculation (EGR) and fuel canister purge are disabled, PCV flow may be estimated based on a difference between a first output of the sensor with boost enabled and a second output of the sensor with boost disabled. Then, during subsequent operation wherein EGR is enabled, PCV flow is enabled, and purge is disabled, a third output of the sensor may be adjusted based on the estimated PCV flow.