Fluid compressor and method of operating a fluid compressor to reduce oil carryover by a compressor piston assembly

An air brake system twin-cylinder fluid compressor comprising:

• a first compressor piston assembly including a first compressor piston head having a bottom side and a longitudinal central axis;
• a second compressor piston assembly including a second compressor piston head having a bottom side and a longitudinal central axis;
• a bottom compressor body plate defining a first nozzle, a second nozzle, a third nozzle, and a fourth nozzle;
• the first nozzle arranged to direct a first oil stream towards the bottom side of the first compressor piston head to cool the first compressor piston assembly;
• and
• the second nozzle arranged to direct a second oil stream towards the bottom side of the first compressor piston head to cool the first compressor piston assembly, wherein each of the first and second oil streams is substantially parallel to each other and to the longitudinal central axis of the first compressor piston head;
• the third nozzle arranged to direct a third oil stream towards the bottom side of the second compressor piston head to cool the second compressor piston assembly;
• and
• the fourth nozzle arranged to direct a fourth oil stream towards the bottom side of the second compressor piston head to cool the second compressor piston assembly, wherein each of the third and fourth oil streams is substantially parallel to each other and to the longitudinal central axis of the second compressor piston head;
• each of the first, second, third and fourth nozzle providing a flow of oil to cool the first compressor piston assembly and the second compressor piston assembly and reducing an oil carryover by the first compressor piston assembly and the second compressor piston assembly by up to about fifty percent as compared to an air brake system twin-cylinder fluid compressor having no nozzles directing oil streams towards the bottom side of the first compressor piston head and the second compressor piston head.