This A/C system uses the constant run V-5 compressor. The V-5 is a variable displacement compressor that can match the automotive A/C demand under all conditions without cycling. The basic compressor mechanism is a variable angle wobble-plate with 5 axially oriented cylinders. The center of control of the compressor displacement is a bellows actuated valve located in the rear head of the compressor that senses suction pressure. The difference in crankcase suction pressure controls the wobble-plate angle and the compressor displacement.

When the A/C capacity demand is high, the suction pressure will be above the control point. The valve will maintain a bleed from the crankcase to suction side (no crankcase-suction pressure differential), and the compressor will have the maximum displacement.

When the A/C demand is lower and the suction pressure reaches the control point, the valve will bleed discharge gas into the crankcase and close off the passage from the crankcase to the suction plenum.

A force balance on the 5 pistons controls the wobble-plate angle. A slight elevation of the crankcase-suction pressure differential creates a total force on the pistons, resulting in a movement about the wobble-plate pivot pin that reduces the plate angle.

The compressor has a unique lubrication system. The crankcase-suction bleed is routed through the rotating wobble-plate for lubrication of the wobble-plate bearing. The rotation acts as an oil separator, removing some of the oil from the crankcase-suction bleed, and rerouting the oil to the crankcase where the oil can be lubricate the compressor mechanism.