A rotary compressor for automotive air conditioners has long been sought to replace the conventional piston compressor. Reciprocating pistons create vibration and noise, that are usually sensed by vehicle passengers. Noise reduction by elimination of the reciprocating motion of the compressor contributes to passenger comfort and more efficient use of engine horsepower.Today, there are two major types of rotary compressors being used in the automotive market--rotary vane compressors and Ogura-Wankel compressors. The Ogura-Wankel has only recently been introduced to the market. This paper tries to examine the application of the Wankel Rotary concept as an automotive air conditioner compressor.