公开(公告)号：EP4047207A1

公开(公告)日：2022-08-24

申请号：EP20876696.4

申请日：2020-10-14

Applicant: BYD Company Limited

Inventor： YAO, Yugang ,  LIU, Guoshan ,  SU, Donglin ,  LIU, Jing ,  ZHANG, Nan

IPC: F04B49/14 ,  F04B53/00 ,  F04B53/14 ,  F04B53/22 ,  B60T11/16

Abstract: A piston pump group for a brake system and a control method thereof are provided, and the piston pump group includes: a piston (2), a pump body (1) provided with an operating chamber, and a transmission mechanism (3) used for driving the piston (2) to move in the operating chamber, where the transmission mechanism includes a lead screw transmission assembly (32), a follower (33), and a planetary gear assembly (31) used for transmitting power to the lead screw transmission assembly, the follower (33) is fixedly connected to the piston (2), the lead screw transmission assembly (32) is used for driving the follower (33) to move relative to the operating chamber, and a limiting member (34) used for limiting the movement of the follower is disposed between the lead screw transmission assembly (32) and the follower (33).