| 摘要 |
1,184,812. Fluid-pressure brakes. TRW. Inc. 6 March, 1967 [24 March, 1966], No. 10495/67. Heading F2F. [Also in Division G1] In an anti-skid braking system for a motor vehicle, a vacuum-servo actuator 30 is adapted to operate a check valve 84 to control the flow of fluid to the brakes 21, 22 of the rear wheel of the vehicle whenever a sensor means 70 responds to a given excess of angular deceleration over linear deceleration to operate a pilot and servo valve 60 which controls the actuation of the vacuum-servo actuator 30, to cause the rear wheel brakes to be released. As shown in Figs. 1 and 2 the sensor means is in the form of a decelerometer 70 provided with a cylindrical inertia mass 71 adapted to slide longitudinally under the influence of linear deceleration and to rotate relatively to a shaft 72 driven from the propellor shaft 16 of the vehicle whenever locking of the rear wheels occurs. Movement of the inertia mass 71 to the right as shown in Fig. 2 moves a linkage 52 and 58 to open a pilot valve 81 in the pilot and servo valve 60 and allow atmospheric pressure to enter a chamber 55 on one side of a flexible diaphragm 65 to urge a diaphragm actuated atmospheric valve 53 to its open position and allow a large volume of air to enter from the port 86 into a chamber 56 and thence to a duct 59 to move the piston 37 of the vacuum-suspended servo actuator 30 (Fig. 3) to the right and close the check valve 84 while at the same time increasing the volume in the chamber 31 to release the brakes on the rear wheels of the vehicle whenever locking of the rear wheels of the vehicle occurs. |
