To suitably maintain a fluid pressure of a wheel cylinder at a lower value in fluid pressure maintenance control.SOLUTION: A fluid pressure control unit for vehicle comprises: a main flow channel which communicates a master cylinder and a wheel cylinder with each other; a sub flow channel for escaping a brake fluid of the wheel cylinder; an electromagnetic valve which is provided on the master cylinder side of the main flow channel with respect to a master cylinder side end of the sub flow channel, and has a main valve element and a main valve seat part which are operated with electromagnetic force; and a control device which performs fluid pressure maintenance control for the wheel cylinder. The electromagnetic valve has: a first flow channel in which the main valve seat part is provided, and which forms a part of the main flow channel; a second flow channel which connects the master cylinder side of the first flow channel with respect to the main valve seat part and the wheel cylinder side of the first flow channel with respect to the main valve seat part; a sub valve element and a sub valve seat part which are provided in the second flow channel, and restrict flow of the brake fluid from the wheel cylinder side to the master cylinder side; and an energization component which energizes the sub valve element to the sub valve seat part side. In an open state that the main valve seat part is opened by the main valve element, the sub valve seat part is blocked by the sub valve element.SELECTED DRAWING: Figure 2
【課題】液圧維持制御において、ホイールシリンダの液圧をより低い値で適切に維持する。【解決手段】マスタシリンダとホイールシリンダとを連通させる主流路、ホイールシリンダのブレーキ液を逃がす副流路、主流路のうち副流路のマスタシリンダ側端部よりマスタシリンダ側に設けられ電磁力で動作する主弁体及び主弁座部を有する電磁弁、及びホイールシリンダの液圧維持制御を行う制御装置を備え、電磁弁は、主弁座部が設けられ主流路の一部を形成する第1流路、第1流路の主弁座部よりマスタシリンダ側と第1流路の主弁座部よりホイールシリンダ側とを接続する第2流路、第2流路に設けられホイールシリンダ側からマスタシリンダ側へブレーキ液が流れることを制限する副弁体及び副弁座部、及び副弁体を副弁座部側に付勢する付勢部材を有し、主弁体により主弁座部が開放されている開放状態で副弁座部は副弁体により塞がれている、車両用の液圧制御ユニット。【選択図】図2
FLUID PRESSURE CONTROL UNIT
液圧制御ユニット
2020-09-10
Patent
Elektronische Ressource
Japanisch