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:
Jun. 28, 2005
Filed:
Jan. 06, 2004
Ryo Matsubara, Kariya, JP;
Satoshi Umemura, Kariya, JP;
Shingo Kumazawa, Kariya, JP;
Hiroyuki Nakaima, Kariya, JP;
Masahiro Kawaguchi, Kariya, JP;
Ryo Matsubara, Kariya, JP;
Satoshi Umemura, Kariya, JP;
Shingo Kumazawa, Kariya, JP;
Hiroyuki Nakaima, Kariya, JP;
Masahiro Kawaguchi, Kariya, JP;
Abstract
A compressor torque estimate device is used for a variable displacement compressor whose displacement is variable based on a compressor control signal for estimating a compressor torque of the compressor. The compressor torque estimate device includes a torque calculator and a corrector. The torque calculator calculates a torque required for driving the compressor based on the compressor control signal, thereby obtaining a calculated torque. The corrector corrects the calculated torque by a procedure of first-order lag, thereby obtaining a corrected torque. The corrector also estimates the corrected torque to be the compressor torque.