| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a control device of a variable displacement compressor, which accurately acquires a full stroke control setting value for preventing windup while eliminating errors caused by component specification changes, tolerance variations, aged deterioration and the like. <P>SOLUTION: The control device of the variable displacement compressor 8 is provided as a component element of a refrigeration cycle having an evaporator 12, and has a function of maintaining a differential pressure between discharge side pressure Pd and intake side pressure Ps or a differential pressure between the discharge side pressure Pd and a crank chamber pressure Pc in the differential pressure proportional to a duty current value to a control valve 13. The control device is provided with a full stroke control setting value computation module (Figure 4) which, when the duty current value 13 is increased greater than a full stroke and when the differential pressure proportional to the duty current value is verified to be no longer maintained, goes back to a point of time when the differential pressure maintenance function is lost, and computes a full stroke duty setting value where a discharge capacity is saturated, based on the duty current value at the point of time. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
