| 摘要 |
1,109,499. Variable-ratio gears. BORGWARNER CORPORATION. 30 July, 1965 [3 Aug., 1964], No. 32798/65. Headings F2C and F2D. A variable-ratio gear comprises a torque converter 12 having an impeller 20, a one-way mounted reactor 22 and contra rotating turbines 21, 23 respectively connected to a planet carrier 36 and a sun gear 32 of a planetary gearing 30 having two sets of intermeshing planet gears, one set 39, 37 meshing the sun gear 32 and a ring gear 34 which is connected to a one-way brake 48, and the other set of intermeshing planets 40, 38 meshing an output sun 33 and a ring gear 35 which can be stationed by a brake 46 for reverse. The planet carrier 36 is fast with the ring gear of a planetary gear 31 having a planet carrier 50 fast with the output sun 33 and a sun gear 52 connectible to its ring gear by a clutch 60 for a normal drive range and stationed by a brake 61 for a low speed drive range. In operation, for normal forward drive the clutch 60 is engaged so that the turbine 21 is directly connected to the output shaft 11 as the planetary gear 31 is locked solid. At low forward speeds the reactor 22 is stationed by a one-way brake 26 and the turbine 23, and thus the sun 32, is driven in reverse. The one-way brake 48 stations the ring gear 34 and the sun gear 32 drives the planet carrier 36 and thus the output shaft 11 forwardly at a reduced ratio. At higher forward speeds the reactor 22 floats freely and the one-way brake also releases so that the turbine 21 drives the output shaft at a 1 : 1 ratio. For a low drive range clutch 60 is disengaged and brake 61 applied to provide a step-down ratio between the planet carrier 36 and the output shaft 11. |
