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. 15, 2018
Filed:
May. 25, 2016
Roger C Sager, Munith, MI (US);
William B Blomquist, Lake Orion, MI (US);
James Daley, Jackson, MI (US);
Aikaterini Tsahalou, Shelby Township, MI (US);
Ronald a Yannone, Jr., Clinton, MI (US);
Luis Del Rio, Ann Arbor, MI (US);
Mark L Lott, Webberville, MI (US);
Joseph Dekar, Jackson, MI (US);
Roger C Sager, Munith, MI (US);
William B Blomquist, Lake Orion, MI (US);
James Daley, Jackson, MI (US);
Aikaterini Tsahalou, Shelby Township, MI (US);
Ronald A Yannone, Jr., Clinton, MI (US);
Luis Del Rio, Ann Arbor, MI (US);
Mark L Lott, Webberville, MI (US);
Joseph Dekar, Jackson, MI (US);
FCA US LLC, Auburn Hills, MI (US);
Abstract
A diagnostic method and system includes a control valve configured to control an amount of air drawn into an evaporative emissions (EVAP) system through an air filter and a vapor canister, and a pressure sensor configured to measure pressure in the EVAP system. The system also includes a controller configured to detect an engine idle-to-off transition and, in response to detecting the engine idle-to-off transition: receive a first pressure from the pressure sensor, fully open a purge valve connected between the vapor canister and an intake port of an engine, fully close the control valve, monitor one or more second pressures received from the pressure sensor, and detect a malfunction of the EVAP system based on the first pressure, at least one of the one or more second pressures, and a diagnostic threshold.