A method and system is provided for reducing chatter in multi-capacity
compressors having disengageable eccentric structures. The multi-capacity
fluid compressor includes a compression chamber having a discharge end
and an inner surface. The compressor also includes a compression member
having a disengageable eccentric structure allowing the compressor to
provide discrete compression capacities. A valve portion is disposed
adjacent to the discharge end of the compression chamber and is arranged
and disposed to discharge a compressed fluid when the compression member
has completed. A discharge arrangement is arranged and disposed to
discharge at least a portion of fluid remaining in the compression
chamber at the completion of the compression cycle. The discharge of at
least a portion of the fluid remaining in the compression chamber reduces
or eliminates forces on the disengageable eccentric structure to limit
rotational acceleration of the disengageable eccentric structure.