公开(公告)号：US20040119332A1

公开(公告)日：2004-06-24

申请号：US10646349

申请日：2003-08-22

发明人： Andrew Marsh ,  John Kemer ,  Charles Eberling ,  Dave Knight ,  Richard T. Ross

IPC分类号： B60T013/00 ,  B60T015/04

CPC分类号： B60T15/20 ,  B60T13/261 ,  Y10T137/2278 ,  Y10T137/2544 ,  Y10T137/7845 ,  Y10T137/86919

摘要： A combined spring brake modulating relay valve integrates the functions of a relay valve and a modulating valve. The housing includes a valve assembly movable in response to air pressure provided to selected ports in the housing. A relay piston selectively communicates with a control port and a primary brake circuit port. A modulating piston includes surfaces selectively pressurized by the primary brake circuit port and a secondary brake circuit port. This modulates the pressure from the delivery port to thereby selectively apply the associated spring brakes if a failure is detected at the primary brake circuit port. The exhaust member selectively controls communication between the supply and delivery ports as necessary.

摘要翻译： 组合弹簧制动调节继电器阀集成了继电阀和调节阀的功能。 壳体包括可以响应于提供到壳体中的选定端口的空气压力而移动的阀组件。 继电器活塞选择性地与控制端口和主制动回路端口连通。 调节活塞包括由主制动回路端口选择加压的表面和次级制动回路端口。 如果在主制动回路端口检测到故障，则调节来自输送口的压力，从而选择性地施加相关的弹簧制动器。 排气构件根据需要选择性地控制供料口和输送口之间的连通。