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:
Oct. 25, 2011
Filed:
May. 22, 2008
Yoshikatsu Sawada, Kariya, JP;
Yasutane Hijikata, Nagoya, JP;
Yoshikatsu Sawada, Kariya, JP;
Yasutane Hijikata, Nagoya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A compressor inlet pressure estimation apparatus for a refrigeration cycle system is disclosed. An electronic control unituses Tefin_lag(N) as an actual corrected temperature Tefin_AD(N) during a period Tpincluded in the timing tto t. During a period Tpincluded in the timing tto t, Tefin_fwd(N) is used as the actual corrected temperature Tefin_AD(N). Thus, a highly accurate corrected temperature Tefin_AD(N) can be determined over the on period (tto t) of a compressor. In addition, Tefin_fwd(N) is used as the actual corrected temperature Tefin_AD(N) during the off period (tto) of the compressor. As a result, a highly accurate corrected temperature Tefin_AD(N) can be determined over the whole period including the on and off periods of the compressor. In this way, a highly accurate estimated value Ps_es(N) of the refrigerant inlet pressure of the compressorcan be determined.