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:
Sep. 22, 2009
Filed:
Mar. 06, 2007
Scott J. Benscoter, Metamora, MI (US);
Lawrence A. Staat, Beverly Hills, MI (US);
Dennis P. Stenson, Highland, MI (US);
Steven J. MC Cormick, Goodrich, MI (US);
Roger G. Van Vechten, St. Clair Shores, MI (US);
Scott J. Benscoter, Metamora, MI (US);
Lawrence A. Staat, Beverly Hills, MI (US);
Dennis P. Stenson, Highland, MI (US);
Steven J. Mc Cormick, Goodrich, MI (US);
Roger G. Van Vechten, St. Clair Shores, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A process is provided for monitoring the filter restriction level of a filter element. The filter element is utilized by an air induction system deployed on a vehicle that includes a mass air flow sensor, a manifold pressure sensor, and a throttle position sensor. The process includes receiving (i) throttle position from the throttle position sensor, (ii) mass flow rate from the mass air flow sensor, and (iii) manifold pressure from the manifold pressure sensor. A reference pressure is determined from the received mass flow rate and the received throttle position, a pressure differential is established between the reference pressure and the received manifold pressure, and a filter restriction level is identified from the established pressure differential and the received mass flow rate.