Title:
CONTROL DEVICE FOR VARIABLE DISPLACEMENT COMPRESSOR, AND CONTROL METHOD FOR THE VARIABLE DISPLACEMENT COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2008/018549
Kind Code:
A1
Abstract:
Provided is a control method for a variable displacement compressor (8) to control a
compression displacement by using a displacement control valve (13) for sensing a
differential pressure between a high-side pressure (Pd) and a low-side pressure (Ps)
in a cooling cycle (7a). The control method comprises calculating a target duty
value (Dt1) of the displacement control valve (13) from a target evaporator blow-out
temperature (TMeva) and a real evaporator blow-out temperature (Teva), calculating
a drive torque (Trq2) of the compressor (8) at the instant when it is assumed from
the high-side pressure (Pd) that the variable displacement compressor (8) is
in a full stroke state, as the upper-limit drive torque (Trq2), calculating an
estimated drive torque (Trq1) of the compressor (8) from a real control current value
(Isolc), setting the target duty value (Dt1) as an output duty value (Dtc) in case
the estimated drive torque (Trq1) is less than the upper-limit drive torque value
(Trq2), and sets a duty value (Dt2) calculated from the upper-limit drive torque
(Trq2), as the output duty value (Dtc) in case the estimated drive torque (Trq1)
is the upper-limit drive torque value (Trq2) or more.
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Inventors:
TAKAHASHI, Eiji (())
Application Number:
JP2007/065628
Publication Date:
February 14, 2008
Filing Date:
August 09, 2007
Export Citation:
Assignee:
Calsonic Kansei Corporation (24-15, Minamidai 5-chome Nakano-k, Tokyo 02, 1648602, JP)
カルソニックカンセイ株式会社 (〒02 東京都中野区南台５丁目２４番１５号 Tokyo, 1648602, JP)
カルソニックカンセイ株式会社 (〒02 東京都中野区南台５丁目２４番１５号 Tokyo, 1648602, JP)
International Classes:
F04B27/14; B60H1/32; F04B49/06; F04B27/14; B60H1/32; F04B49/06
Attorney, Agent or Firm:
MIYOSHI, Hidekazu et al. (Toranomon Kotohira Tower, 2-8 Toranomon 1-chome,Minato-k, Tokyo 01, 1050001, JP)
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