| 摘要 |
<p>1276170 Fluid pressure brakes ALFRED TEVES GmbH 22 Sept 1969 [28 Sept 1968] 46642/69 Heading F2F [Also in Division H2] In an electrically-operated vehicle with a rear wheel drive, a brake pedal 12 is actuated to apply hydraulic pressure directly from master cylinder 6 to brake cylinders 9 on the front axle. Pressure is also applied through a twoway valve 13 to an interrupter 5 which disconnects motor 2 from battery 1, an electric controller 4 being set for regeneration, whereby energy is fed back to the battery from the motor through an inductive link under the control of the pedal 12. A braking torque detector 8 responds at a maximum value to open a valve 7 whereby pressure is then applied from cylinder 6 to the brake cylinders 10 at the rear of the vehicle. The detector 8 comprises a pair of hydraulic cylinders withpistons coupled to the body of the motor which turns under the effect of the braking torque, Fig. 3 (not shown). The twoway valve 13 enables operation of the controller 4 and the interrupter 5 by pressure on the pedal 12 despite failure of one of the hydraulic brake circuits. In a modification, the braking system is used on a vehicle with an all-wheel drive. Hydraulic braking is applied to both axles when the electrical braking torque has reached a maximum. Delay in the application of hydraulic braking is obtained by throttling the hydraulic system and by rapid response of the controller 4, Fig. 2 (not shown). Several electric motors may be coupled to the axles or individual wheels.</p> |
