| 摘要 |
1,101,319. Variable-ratio gears. CLARK EQUIPMENT CO. 24 May, 1966 [7 June, 1965], No. 23187/66. Heading F2D. [Also in Division F1] A push-start circuit for a vehicle with a power-shift transmission 20 and a torque converter 18, comprises an output driven pump 164 and a control valve 214 which is biased by a spring 176 to the position shown in which the pump 164 discharge, which is supplied to a port 206, is connected through a port 208 with a line 234 to supply liquid to the servo system for push-starting. An input driven pump 40 supplies liquid to a port 210 of the valve 214 which, in the position shown connects the port 210 to an inlet port 192 of the output driven pump 164. A passage 222 in the spool of valve 214 admits the discharge pressure of pump 40 to the right-hand end of the spool, so that when the input speed is sufficiently high the spool is shifted to the left to communicate the main pump 40 discharge with the servo supply port 208 and to interconnect the output pump 164 discharge and intake ports 206, 192. The output pump 164 draws from a reservoir 46 by way of a port 194, check valve 196 and port 192. When the input pump 40 is operative to supply the servo pressure, restricted passages 212, 204 ensure an interchange of liquid from the pump 40 to the output pump 164 circuit and to the reservoir to cool the liquid in the output pump circuit. The transmission and control system is described in Specification 1,083,429. |
