公开(公告)号：US3977734A

公开(公告)日：1976-08-31

申请号：US568810

申请日：1975-04-17

申请人： John Fritiof Ronnhult ,  Ernst Goran Estmar ,  Bjarne Louis Petersen

发明人： John Fritiof Ronnhult ,  Ernst Goran Estmar ,  Bjarne Louis Petersen

IPC分类号： B60T8/46 ,  B60T8/1761 ,  B60T8/36 ,  B60T8/50 ,  B60T8/06 ,  B60T15/02

CPC分类号： B60T8/5018 ,  B60T8/3605 ,  Y10T137/86919

摘要： A valve unit for controlling air flow and braking pressure in the brake cylinder of a pneumatic braking system. The valve unit has an inlet and an outlet valve assembly each of which are controlled by a solenoid valve, which is in turn controlled by an electronic braking control system. In the inlet valve assembly there is a valve diaphragm which on one side is biased by one pressure to close the valve unit, and which on the opposite side is biased by two pressures to open the valve unit. The ratio between the areas affected by the respective pressures is selected in such a way that the brake cylinder pressure is raised in essentially constant steps.

摘要翻译： 一种用于控制气动制动系统的制动缸中的空气流量和制动压力的阀单元。 阀单元具有入口和出口阀组件，每个都由电磁阀控制，电磁阀又由电子制动控制系统控制。 在入口阀组件中有一个阀膜片，一个侧面被一个压力偏压以关闭阀门单元，并且相对侧被两个压力偏压以打开阀门单元。 由相应压力影响的区域之间的比例选择为使得制动缸压力基本上恒定地升高。