Exhaust gas recirculation valve anti-fouling device for motor vehicle, has metallic guard connected to valve and insulating valve stem from exhaust gas irrespective of position of valve, where guard is made of metal

摘要

The device has a metallic guard (10) connected to a valve and insulating a valve stem (7) from an exhaust gas irrespective of a position of the valve. The guard presents a revolution form of axis virtually identical to a longitudinal axis of the valve stem. The guard has a conical shape in its base part (10a) near its end, and has a cylindrical shape in its top part (10b) near its another end. The guard is made of metal such as stainless steel, resisting to high temperature of the exhaust gas, and/or is made of sheet material.