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. 17, 1992
Filed:
Jan. 07, 1991
William J Bolander, Clarkston, MI (US);
Michael R Witkowski, Sterling Heights, MI (US);
Saturn Corporation, Troy, MI (US);
Abstract
A method is described for adjusting the output power delivered by an internal combustion engine to compensate for variations in engine loading induced by a variable capacity refrigerant compressor of a vehicle air conditioning system. This is accomplished by estimating the change in engine loading due to the compressor, based upon an indication of the engine intake air temperature, and then, adjusting the setting of an engine output power control mechanism, in accordance with the estimate. An estimate for the change in engine loading induced when starting or stopping the variable capacity compressor is derived from a schedule of values based upon the temperature of the engine intake air. An estimate for the change in engine loading induced by the off-idle operation of the variable capacity compressor is derived as a function of the difference between the intake air temperature and a retained previous value for the intake air temperature.