| 摘要 |
<p>A pressure generating device for a vehicle braking system comprises pressure generating members, preferably pistons of a tandem master cylinder, and pressure chambers, preferably chambers of a master cylinder, one of which is connected through a control valve to a vehicle brake. An operating valve is provided which is directly and positively actuated in response to predetermined excess movement of one of the members, upon a pressure failure in one of the chambers, to pass the full pressure of the other chamber to the wheel brake, rendering the control valve effectively inoperative.</p> |
