| 摘要 |
<p>PURPOSE:To reduce a necessary force for operation by constituting an electromagnetic valve with a main valve and an auxiliary valve for making both valve seats nearly equal in effective pressure receiving areas. CONSTITUTION:An armature (42), an auxiliary piston (43), a spring receiving ring (44) and a main piston (45) are fixed on a plunger (41) from the top in order. On an auxiliary valve (62), a diameter portion, around which a noise eliminating projection (56a) is formed, serves as an effective pressure receiving area (A2) of a valve seat. On a main-valve (66), a diameter portion of a noise eliminating gum (65) on the main piston (45) serves as an effective pressure receiving area (A1), and (A1) and (A2) are set in a relation nearly equal to each other. Even if a pressure difference occurs before and behind an electromagnetic valve, the pressure difference is balanced by the auxiliary valve (62) and operating force becomes little.</p> |
