| 摘要 |
1,042,660. Change-speed gearing. MAYBACH MOTORENBAU G.m.b.H. Nov. 5, 1964 [Nov. 6, 1963], No. 45120/64. Heading F2D. A hydromechanical transmission giving four forward ratios through two parallel power paths comprises two adjacent coaxial hydraulic torque converters 14, 15 with their pump elements 12, 13 interconnected and their turbine elements 16, 17 arranged on two concentric shafts 18, 19 which, with a layshaft 20, carry pairs of pinions 21, 22 and 23, 24, the gear shifts being effected by emptying and filling the converters and engaging shift clutches 25, 26, 27, the first two of which lock pinions 22, 23 to parallel shafts 20, 18, respectively, while clutch 27 locks shafts 18, 19 together. Converter 14 operates with high starting torque conversion with a steeply rising output curve, while converter 15 operates with wide range high output at high speeds. The output shaft may be formed either by an extension 28 of shaft 20 or a similar extension 29 of shaft 18, the order of engaging the clutches for first to fourth gears being, in either case 25 and 27, 25, 26, 26 and 27, converter 14 being effective for first and third gears, and converter 15 for second and fourth. An overdrive unit may be geared to shaft 19 between the converters, and a reverse drive may also be incorporated. |
