| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize three kinds of modes, namely, a pressure decrease mode, a hold mode, and a pressurization mode, in an antilock brake controller and make the pressurization mode relaxed pressurization in which a pressurization rate is constant. SOLUTION: A solenoid valve 31 is provided with a spool 33 whose one end side is slidably fitted in a first liquid chamber 32a of a sleeve 32 in a liquidtight condition, whose the other end side is inserted in a second liquid chamber 32b in play, and in which a fixed orifice 40 is provided in an introduction passage 39 extended in the axial direction. Moreover, it is provided with a spring 30 which energizes the spool 33, a movable iron core 34 fixed on the spool 33, and a coil 36. When electricity is supplied to the coil 36 to absorb the movable iron core 34 against spring force, the spool 33 moves in the opposite direction to the direction of energization of the spring 30, and an outer peripheral face 33a of the spool 33 blocks a first port 38a and a second port 38b.</p> |
