| 摘要 |
<p>PURPOSE:To eliminate the need for a throttle spool and simplify the structure of a hydraulic booster by actuating the throttle valve in accordance with the relative rotatory displacement of a driving piston and a working rod. CONSTITUTION:The brake pedal 40 is stepped in and the working rod 15 approaches to the force driving piston 3. The pin 16 of the rod 15 advances in the long hole 18 of the piston 3 against the force of the spring 19 and the piston 3 is rotatorily displaced clockwise. This displacement permits the throttle valve 37 to start closing, the working hydraulic pressure to be generated in the longitudinal grooves 27 and 27' of the piston 3, and them 27 and 27' to communicate to the valve hole 32 of the valve body 2. On the contracy, it permits also the different longitudinal groove 29 and 29' which communicate to the drain room 5 to be shifted from the position where it is disconnected from the valve hole 35. This working hydraulic pressure is applied to the booster room 4 through the longitudinal grooves 28 and 28' which always communicate to the valve hole 35 and the piston 3 is follow-up- hydraulic-actuated by the rod 15. The brake device is actuated through the outlet shaft and a vehicle is braked.</p> |
