Flow control valve for exhaust gas purifying system

摘要

A flow control valve for an exhaust gas purifying system which is divided into a first valve chamber into which the exhaust gases flow and a second valve chamber out of which the exhaust gases flow. A first valve means responsive to the exhaust gases controls the communication between the first and second valve chambers and a second valve means controls the operation of the first valve means in response to the negative pressure in an air intake system.