| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve valve closing responsiveness in current-carrying OFF time to a coil, in a normally closed solenoid valve. <P>SOLUTION: This solenoid valve applied as a suction valve part 30A of a high-pressure pump, generates electromagnetic attraction force between a flange 55A and a movable core 53 when carrying an electric current to the coil 51, and the movable core 53 moves in the attraction direction (the left direction of a drawing). When current-carrying to the coil 51 is turned off, the electromagnetic attraction force disappears, and the movable core 53 and a stem 41 integrally move in the anti-attraction direction (the right direction of the drawing) by energizing force of a second spring 43A. A valve element 32 also moves in the valve closing direction for seating on a seat part 316 of a seat member 31 by energizing force of a first spring 33. Since the energizing direction of the first spring 33 and the second spring 43A is the same, weight of the movable core 53 and the stem 41 does not become a load to valve closing operation of the valve element 32. The lightweight valve element 32 can move independently. <P>COPYRIGHT: (C)2013,JPO&INPIT |
