COMPRESSOR HAVING AUXILIARY BOOST AIR OUTLET PASSAGE FOR REDUCING OR COMPLETELY REMOVING OIL/DUST INSERTED INTO PASSAGE BY POSITIONING INTAKE PORT OF AUXILIARY BOOST GAS PASSAGE FAR FROM SURFACE OF VOLUTE

摘要

PURPOSE: A compressor having an auxiliary boost air outlet passage is provided to prevent fine particles of oil/dust from flowing into the passage by forming the auxiliary boost air outlet passage at a compressor volute and a through-port at a projection unit extended inward the surface of a volute and to improve performance of an engine by controlling boost pressure and re-circulating the air. CONSTITUTION: A compressor having an auxiliary boost air outlet passage is composed of a compressor wheel(7) mounted rotatively in a compressor housing; the compressor housing having a gas exhaust volute(15) disposed near the compressor wheel and a gas intake port(14) and formed by the inside or surface of the housing to supply gas by boost pressure; and the auxiliary boost air outlet passage for communicating with the exhaust volute. At least a portion of the auxiliary boost air outlet passage is formed by a projection extended to the volute. The projection is opened at which an upper end of the passage is separated from the surface of the volute.