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. 04, 2008
Filed:
May. 25, 2004
Hsiao-an Hsieh, Troy, MI (US);
Francois Charette, Canton, MI (US);
Steven Lake, Manchester, MI (US);
Harish Maruvada, Canton, MI (US);
Mike Calkins, Macomb Township, MI (US);
Alex Przebienda, Northville, MI (US);
David Volker, Wixom, MI (US);
Hsiao-An Hsieh, Troy, MI (US);
Francois Charette, Canton, MI (US);
Steven Lake, Manchester, MI (US);
Harish Maruvada, Canton, MI (US);
Mike Calkins, Macomb Township, MI (US);
Alex Przebienda, Northville, MI (US);
David Volker, Wixom, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A method and system for assessing a level of refrigerant in a vehicle air conditioning system. A refrigerant charge value is determined as a function of ambient air temperature, ambient air humidity, conditioned air temperature, and compressor cycling signals. The refrigerant charge value is compared to a threshold value to determine whether the level of refrigerant is acceptable.