A 7 -Cylinder IVD Compressor for Automotive Air Conditioning

Abstract

<div class="htmlview paragraph">A 7-cylinder, wobble plate type, infinitely variable displacement, (IVD), compressor has been developed to meet the following requirements as set forth by the world automotive manufacturers:</div> <div class="htmlview paragraph"> <ol class="list nostyle"> <li class="list-item"><span class="li-label">1</span><div class="htmlview paragraph">Wide range of capacity control to eliminate clutch cycling which causes temperature and humidity fluctuations of louver outlet air and unexpected engine load variations</div></li> <li class="list-item"><span class="li-label">2</span><div class="htmlview paragraph">Near perfect protection of the evaporator against icing</div></li> <li class="list-item"><span class="li-label">3</span><div class="htmlview paragraph">Reliability under all field operating conditions</div></li> <li class="list-item"><span class="li-label">4</span><div class="htmlview paragraph">Quiet operation in a compact and lightweight package to suit the new trends in automotive design.</div></li> </ol> </div> <div class="htmlview paragraph">A simpler mechanism has been applied to the variable angle cam drive and wobble plate rotation prevention method than with the conventional IVD compressor. The 7-cylinder design, with fewer parts for the piston drive mechanism, enables a quiet compressor of 161.3 cc displacement in a 118 mm diameter casing. An internal control valve is integrated in the center of the valve plate assembly. Mass flow rate compensation is attained using a discharge pressure sensing rod which modulates the opening pressure of the bellows valve.</div>