ELECTROMAGNETIC VALVE Russian patent published in 2003 - IPC

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: invention relates to valves and fittings, particularly to electromagnetic valves used for utilization of fuel fumes in internal combustion engines. Said electromagnetic valve has plastic body with central holes; coil winding on form supported by body; shutoff element including armature with press-fitted shutoff element arranged in central hole of body for interacting by one end with seat being acted upon by compression spring, and by other end, with pole limiting armature travel. One end of pole has threaded part for fastening and centering in central hole of body relative to axle with armature. Adjustable gap is formed between end face surfaces of armature and pole. End face surfaces of armature and pole are of truncated cone shape. All concave truncated cone surface of pole is coated by layer of gasoline-resistant elastic material. According to other design version, end face of pole is completely coated with layer of gasoline- resistant elastic material, and side concave truncated cone surface is coated with layer of gasoline-resistant elastic in form of segments. EFFECT: improved dynamic characteristics of valve. 3 cl, 2 dwg