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. 25, 2003
Filed:
Sep. 08, 2000
Applicant:
Inventors:
Craig Andrew Weldon, Chatham, CA;
Kwang Yew, Chatham, CA;
Assignee:
Siemens Automotive Inc., Chatham, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 3/04 ;
U.S. Cl.
CPC ...
G01M 3/04 ;
Abstract
A system and method for performing a leak verification test to test the evaporative emission space for leakage comprising self-calibrating the purge valve, closing the evaporative emission space to atmosphere and an intake system of the engine and monitoring for conditions calling for aborting the test, performing a leak determination test, and entering a sleep mode while the engine continues to run.