Change-speed transmission

摘要

1,094,449. Friction clutches; change-speed gear control. FORD MOTOR CO. Ltd. June 14, 1966 [June 28, 1965], No. 26466/66. Addition to 1,018,539. Headings F2C and F2D. In the clutch 68 of the changespeed planetary gear of Specification 1,018,539, the sun gear shaft 481 is formed with a central bore 165, in which are received two concentric oil distributer tubes 166, 168, oil being passed via the annular space between the tubes and the ports 176, 178 to the inner cylinder chamber 1181, the tube 168 communicating, via port 180, with the servo of the forward clutch 401 (see Specification 1,018,539), so that, on engaging clutch 401, together with clutch 68 for one ratio, pressure oil is fed via ports 186, 184, 190 and 200, into a valve bore 192 forcing the valve 194 to the right to seal bore 202 connecting the inner and outer chambers 1181, 1161. On releasing clutch 401, and using the clutch 68 alone for another ratio, pres- sure oil in the chamber 1181 forces the valve 194 open, and flows into the outer chamber 1161. On release of pressure in chamber 1161 a ball valve 206 is centrifugally lifted from its seat 210 to prevent a cen- trifugal pressure build-up in the residual oil in the chamber. Thus the torque capacity of the clutch 68 when engaged together with the clutch 401 to obtain one forward ratio is less than when it, 68, is engaged alone to provide a different ratio (e.g. reverse), and it is thus not necessary for the main regulator valve to provide pressure augmentation in reverse.