公开(公告)号：US20160123418A1

公开(公告)日：2016-05-05

申请号：US14527053

申请日：2014-10-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Joseph K. Moore ,  David Begleiter ,  Veit Held

IPC: F16D65/18 ,  F16D55/226

CPC classification number: B60T13/686 ,  B60T13/662 ,  F16D2121/04 ,  F16D2125/10

Abstract: A wheel braking system includes a fluid source connected to an actuator that applies a force to a friction element for retarding rotation of the wheel. The braking system also includes a hydraulic circuit that has a first fluid passage providing direct communication between the fluid source and the actuator and a second fluid passage in communication with the first passage. The second fluid passage has a first portion and a second portion and includes a reciprocating piston assembly with a first piston fixed to a second piston for selectively amplifying a volume of the pressurized fluid received by the actuator. The first portion of the second passage is in fluid communication with the first piston and the second portion is in fluid communication with the second piston. The first piston has a first diameter and the second piston has a second diameter that is greater than the first diameter.

Abstract translation: 车轮制动系统包括连接到致动器的流体源，致动器向摩擦元件施加力以阻止车轮的旋转。 制动系统还包括具有提供流体源和致动器之间的直接连通的第一流体通道和与第一通道连通的第二流体通道的液压回路。 第二流体通道具有第一部分和第二部分，并且包括往复活塞组件，其具有固定到第二活塞的第一活塞，用于选择性地放大由致动器接收的加压流体的体积。 第二通道的第一部分与第一活塞流体连通，第二部分与第二活塞流体连通。 第一活塞具有第一直径，第二活塞具有大于第一直径的第二直径。