| 摘要 |
<p>A solenoid (12) for an electromagnetically operated valve (10) includes a bobbin (66) having a substantially rectangular or elliptical cross section, a pole plate (28) stationary with respect to the bobbin, and an armature (34) slidable within the bobbin in response to a magnetic field generated by the coil (32) through the pole plate. A coil wound around the bobbin has a rectangular cross section which on a short axis side includes a width W. A relation between width W and a virtual cylindrical iron core of diameter D having the same cross sectional area as an armature cross sectional area is expressed as D=(0.4 to 0.8) W. A ratio of a length A of a long axis side of the armature to a length B of a short axis side of the armature has a range between 3.1‰¤ (A/B)‰¤4.5.</p> |
