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. 20, 1999
Filed:
Sep. 22, 1998
Applicant:
Inventors:
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60H / ;
U.S. Cl.
CPC ...
62133 ; 622283 ; 622285 ; 62229 ; 12333917 ;
Abstract
An automobile air-conditioning apparatus in which the compressor torque of a variable capacity refrigerant compressor is estimated with improved accuracy. The compressor torque is measured on the basis of (1) high-side pressure of the refrigerating circuit directly influencing the compressor torque and (2) a control current value directly controlling the compressor. The accurately estimated compressor torque is then used to stabilize the speed of the vehicle engine driving the compressor.