Patent ID: 6273074
Filing Date: 2001-08-14
Classification: F02M,Y02T

Abstract:
A crankcase emission control system for a vehicle comprising:a blow-by gas extraction port for a crankcase;a connecting tube for connecting a carburetor and an air cleaner;a communicating opening connecting a shaft hole surrounding said crankcase with a curved communicating passage;a horizontal communicating passage for a breather chamber, wherein said curved communicating passage is connected to said horizontal communicating passage in order to deliver crankcase blow-by gas to the breather chamber;a breather chamber joint pipe connected through an introduction tube;a catch tank, the introduction tube provided for leading blow-by gas occurring inside the crankcase to the catch tank and the catch tank has at least an inside surface, an outside surface, a right side surface, a left side surface, a top surface, a bottom surface, a front side surface, and a rear side surface, wherein blow-by gas is expanded in the catch tank to effect gas-liquid separation and liquid accumulates along the inside and bottom surfaces of the tank;an introduction pipe formed at a corner portion of the catch tank where the bottom surface, front side surface, and either of the right and the left side surfaces meet, wherein the introduction pipe is connected to said introduction tube;a catch tank joint pipe for connecting the catch tank to the connecting tube, wherein the joint pipe is positioned along either the right or the left side surface of said catch tank for providing liquid-free communication of gases to the connecting tube.