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:
Nov. 13, 1984
Filed:
Nov. 03, 1983
James C Elmslie, Pontiac, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
The refrigerant compressor of a motor vehicle air conditioning system in which the compressor is normally cycled on and off according to cooling demand is maintained continuously on or continuously off during idle operation according to a measure of the compressor duty cycle. During non-idle operation, a measure of the compressor duty cycle is compared to a reference duty cycle corresponding to a cooling demand above which it is desired to maintain the compressor on during idle operation and below which it is desired to maintain the compressor off during idle operation. At the onset of idle operation, the compressor is maintained on or off, and at the expiration of a time period corresponding to the duration of idle operation typically encountered in stop and go driving, normal compressor cycling is resumed.