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:
Jul. 30, 2002
Filed:
Jun. 02, 2000
Joseph A Gale, Northville Township, MI (US);
Kwangtaek Hong, Ann Arbor, MI (US);
DaimlerChrysler Corporation, Auburn Hills, MI (US);
Abstract
A method for detecting a low-charge state in an air conditioning system. The method monitors the temperature of the air exiting the evaporator to determine the existence of a low-charge state. A low-charge state exists if the temperature of the air exiting the evaporator is less than a predetermined temperature limit. A low-charge state also exists if the rate with which the difference between the temperature of the air exiting the evaporator and the ambient air temperature is less than a predetermined slope. An air conditioning system having a controller which prevents a compressor from cycling on the detection of a low-charge state is also provided.