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:
May. 07, 2013
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 unitanswers YES by judging that the command to start a compressoris issued when an air-conditioning switch is turned on in step S. After that, the electronic control unitanswers NO in the case where a timer count time Tc is shorter than a predetermined time Tin step S. At the same time, Tefin_C is set to 15° C. in step S. The lower one of Tefin_C and Tefin determined in this way is determined as Tefin_d (step S). After that, Tefin_d is input to the first-order lag function to acquire Tefin_AD(N). Then, the control proceeds to step S, where the estimated value Ps_es(N) of the refrigerant inlet pressure of the compressoris determined using Tefin_AD(N) and Gr.