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. 09, 2014
Filed:
Jun. 29, 2011
Applicants:
Mark G. Smith, Canton, MI (US);
Trent G. Sutherland, Royal Oak, MI (US);
Inventors:
Mark G. Smith, Canton, MI (US);
Trent G. Sutherland, Royal Oak, MI (US);
Assignee:
Ford Global Technologies, LLC, Dearborn, MI (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B 5/00 (2006.01); G01K 13/00 (2006.01); G01M 1/38 (2006.01); G05B 13/00 (2006.01); G05B 15/00 (2006.01); F25B 49/00 (2006.01);
U.S. Cl.
CPC ...
F25B 49/005 (2013.01); F25B 2700/21173 (2013.01); F25B 2700/21175 (2013.01);
Abstract
A low air conditioning refrigerant detection method for a vehicle air conditioning system includes measuring an evaporator core outlet refrigerant temperature, measuring an evaporator core outlet air thermistor temperature, calculating a refrigerant to air temperature delta value based on difference between the evaporator core outlet refrigerant temperature and the evaporator core outlet air thermistor temperature and determining system refrigerant charge level based on the refrigerant to air temperature delta value.