| 摘要 |
<p>The valve has two input flowpaths (41,42) corresponding to the hydraulic braking circuit on different sides of the vehicle and a control output port (16) for connection to the trailer brake valve (1). Each input flowpath contains a non-return valve (7,8) having associated therewith flow sensitive means preferably in the form of a piston (9,10) with an orifice (11,12) providing a restricted flowpath giving rise to a pressure drop tending to close or assist closure of the non-return valve. Means are provided to prevent simultaneous closure of the two non-return valves.</p> |
