| 摘要 |
1276280 Variable speed gear control FORD MOTOR CO Ltd 19 April 1971 [21 May 1970] 27038/71 Heading F2D A variable speed gear including planetary elements controlled by hydraulic brake and clutch servos 50, 76, 84, 92 (e.g. a Simpson train) selectively connectable to a pressure circuit by distributer valves 148, 154, 158 has the pressure in its pressure circuit controlled by a regulator valve 98 with a valve chamber connected between the circuit and a source 42 of hydraulic pressure, a valve element in the valve 98 controlling the communication between the source and the circuit, there being a pressure area 122 on the element connected to the circuit via a valve 136 controlled electrically in response to output speed. The valve element may also react to engine torque (from a throttle control valve 20) and to the engagement of a forward ratio (servo 50). |
