| 摘要 |
1,199,572. Driving arrangements; regenerative braking. RICHFIELD INDUSTRIAL EQUIPMENT Ltd. 21 July, 1967 [28 Sept., 1966], No. 43360/66. Heading B7H. [Also in Division F2] Fork-lift trucks, industrial tractors, cranes, urban delivery vehicles and golf buggies are driven by an hydraulic power system comprising a flywheel 13 operating in an evacuated casing 4, a pump 7 operating in an oil-filled chamber 2 to initially energize the flywheel and then subsequently being operated by the flywheel to supply oil under pressure to an hydraulic motor 29 fixed to a sump 30 of a gear-case which houses gears 31, 32 and a differential 33 from which half-shafts of the vehicles are powered. An external pump (not shown), driven by an electric motor or diesel engine, supplies high-pressure oil to the pump 7 which, acting as a motor, drives a shaft 8 and a drum 9, and through a belt 11, the cup bearing 12, the flywheel 13 and shaft 17. When the pump is brought up to its maximum governable speed, the stroke of the pump is reduced to zero and the pump is disconnected from the external pressure source. To put the vehicle in motion, the function of the pump 7 is changed by its control lever 43 to cause it to act as a pump driven by the flywheel through the belt 11 and toothed drum 9. The output of the pump 7 is led to the hydraulic motor 29 from whence it is returned to the inlet of the pump 7. When the vehicle is on overrun, e.g., on descending a hill, the motor 29 is caused to act as a pump, and the pump 7 is adjusted to act as a motor, so that this energy is recovered and transmitted back to the flywheel. |
