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:
Feb. 22, 2005
Filed:
Aug. 16, 2001
Applicants:
Craig S. Rendahl, Tuscon, AZ (US);
Theresa A. Foley, Delavan, WI (US);
Inventors:
Craig S. Rendahl, Tuscon, AZ (US);
Theresa A. Foley, Delavan, WI (US);
Assignee:
SPX Corporation, Charlotte, NC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N003/00 ;
U.S. Cl.
CPC ...
Abstract
A method and system detects the function of a catalytic converter in a vehicle using data received from an open path emissions sensor. The factors considered include whether the vehicle moving on a road is operating in a closed loop operating condition, whether the vehicle is operating in a cold start mode, and the hydrocarbon and other tailpipe emissions concentrations in an exhaust stream of the vehicle as measured by the open path sensor.