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:
Mar. 27, 2001
Filed:
May. 15, 1998
Applicant:
Inventors:
William B. Blomquist, Clarkston, MI (US);
Michael W. Weglarz, Macomb Township, MI (US);
Assignee:
Chrysler Corporation, Auburn Hills, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M 3/302 ;
U.S. Cl.
CPC ...
F02M 3/302 ;
Abstract
A method for controlling fuel vapor purge flow in an automotive type internal combustion engine. The method includes the steps of determining existence of a purge ON condition and determining a simulated engine airflow value. A desired purge flow is calculated as is a value for a desired purge solenoid current. Utilizing a PID control methodology, the desired purge solenoid current is produced and a purge driver generates a PWM signal with to control a purge solenoid with the purge solenoid.