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:
Jan. 04, 2011
Filed:
May. 28, 2008
Gregory A. Major, Farmington Hills, MI (US);
Harry E. Eustice, Troy, MI (US);
Kenneth L. Porrett, Grand Blanc, MI (US);
Edwin J. Stanke, Pontiac, MI (US);
Todd J. Gordon, Royal Oak, MI (US);
Gregory A. Major, Farmington Hills, MI (US);
Harry E. Eustice, Troy, MI (US);
Kenneth L. Porrett, Grand Blanc, MI (US);
Edwin J. Stanke, Pontiac, MI (US);
Todd J. Gordon, Royal Oak, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A method of operating a HVAC system in a vehicle having an engine that operates in a high efficiency mode and a less efficient mode is disclosed. The method may comprise the steps of: operating a refrigerant compressor to cool a passenger compartment and charge a cold thermal storage apparatus; determining if a cold charge in the storage apparatus has exceeded a threshold; enabling compressor cycling if the cold charge in the storage apparatus has exceeded the threshold; detecting if the engine is operating in the high efficiency mode; determining an amount of HVAC loads on the engine; determining a proximity of the engine operation to a switching point from the high efficiency mode to the less efficient mode; and conducting a HVAC load shed if the HVAC load reduction allows the engine to stay below the switching point and the compressor cycling is enabled.