Valve arrangement for use in mixture ratio control system of internal combustion engine

摘要

In an automotive internal combustion engine having an exhaust cleaning catalytic converter in the exhaust system and a mixture ratio control system for controlling the air-to-fuel ratio of combustible mixture toward a predetermined value that will enable the catalytic converter to produce a maximum conversion efficiency, a valve arrangement for use in the mixture ratio control system, comprising a valve unit adapted to control the flow of fluid therethrough either cyclically or continuously and a stationary support member or structure supporting the valve unit and separate from the engine construction so that the valve unit is isolated from the vibrations produced in the engine. The valve arrangement may further comprise resilient bracket means intervening between the valve unit and the support member or structure.