| 摘要 |
<p>1469126 Expanding wheel gear; clutch control ROBERT BOSCH GmbH 7 June 1974 [8 June 1973] 25412/74 Headings F2C F2D and F2L A combined automatic starting clutch and expanding pulley belt transmission for a motor vehicle comprises, at each end of a shaft 17, driven through a reverse gear 10, two driving pulley flanges 34, 36, both freely rotatable and axially movable on the shaft, and pressed axially rightwards together, through a presser plate 29 and thrust bearing by a spring-opposed piston 24, to produce first clutching of the flange 36 against an axially fixed clutch plate 40, followed by closure of the flanges on to the belt 35, to produce stepless reduction of input-output speed ratio. Hydraulic pressure 48 loading the piston 24 is supplied by a pump 44 at a pressure regulated, for starting and ratio control, by a valve 46, loaded by an electro-magnetic winding 50, energized by a variable current at 55...59 in accordance respectively with engine speed, accelerator pedal position, kickdown, gradient and service braking.</p> |
