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:
Dec. 11, 2012
Filed:
Oct. 24, 2008
Gregory A. Major, Farmington Hills, MI (US);
Kenneth L. Porrett, Grand Blanc, MI (US);
John I. Frey, Shelby Township, MI (US);
Shawn L. Boozer, Clarkston, MI (US);
Edwin J. Stanke, Pontiac, MI (US);
Gregory A. Major, Farmington Hills, MI (US);
Kenneth L. Porrett, Grand Blanc, MI (US);
John I. Frey, Shelby Township, MI (US);
Shawn L. Boozer, Clarkston, MI (US);
Edwin J. Stanke, Pontiac, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method of controlling a power input to a compressor clutch, via an A/C clutch voltage controller, that selectively drives an A/C compressor in a vehicle HVAC system is disclosed. The method may comprise the steps of: determining a first electric power level needed to cause the compressor clutch to move to a full engagement position from a compressor clutch non-engagement position; applying the first electric power level to the compressor clutch to cause the compressor clutch to move to the full engagement position; determining a second electric power level, which is lower than the first electric power level, needed to maintain the compressor clutch in the full engagement position; and applying the second electric power level to the compressor clutch to maintain the compressor clutch in the full engagement position.