| 摘要 |
A pressure control device, wherein an armature (5) having a valve element (8) with an oil passage (15) formed therein and a valve structure incorporated therein, which is movably supported by a diaphragm (4) and energized by a compression coiled spring (10) toward a valve seat part (25) projectedly provided at the bottom face of a case (2) is disposed in a housing (12) formed by crimp-connecting the case (2) to a cover (3), a ball (19) installed so as to be allowed to abut on and separate from a valve hole part (22), a valve spring (18) energizing the ball (19) in the direction for separating the ball (19) from the valve hole part (22), and a ball holder plate (20) having a part projected toward the valve seat part (25) while holding the ball (19) are disposed in the valve element (8), and when the armature (5) is pushed upward by combustion pressure, the ball (19) leaves the valve hole part (22) to open a valve.
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