公开(公告)号：US20130098236A1

公开(公告)日：2013-04-25

申请号：US13660730

申请日：2012-10-25

Applicant: ADVICS CO., LTD.

Inventor： Masafumi HATTORI ,  Kenta Ishikawa

IPC: F15B9/10

CPC classification number: B60T13/57

Abstract: A vacuum brake booster includes a movable wall forming a vacuum chamber and a variable pressure chamber in a housing and a valve body connected to the movable wall. A valve mechanism having a vacuum valve for establishing or interrupting the communication between both chambers corresponding to the movement of a plunger and having an air valve for establishing or interrupting the communication between the variable pressure chamber and atmosphere are disposed in an axial hole of the valve body. Atmosphere after the air valve passed flows into the variable pressure chamber through an axial passage and a radial passage formed in the valve body. The axial passage is constituted by a cylindrical inner passage formed at the outer circumference of the plunger by an arc-like flow regulating wall and an arc-like inner circumferential wall portion and an outer passage formed at the outer circumference of the inner passage.

Abstract translation: 真空制动助力器包括在壳体中形成真空室和可变压力室的活动壁和连接到可移动壁的阀体。 具有用于建立或中断两个室之间的连通的真空阀的阀机构设置在阀的轴向孔中，该真空阀用于建立或中断与柱塞的移动相对应的连通并具有用于建立或中断可变压力室与大气之间的连通的空气阀 身体。 空气阀通过后的气氛通过形成在阀体中的轴向通道和径向通道流入可变压力室。 轴向通道由柱形外圆周形成的圆柱形内部通道由弧形流动调节壁和弧形内周壁部分组成，外部通道形成在内部通道的外圆周上。