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    • 1. 发明公开
    • MULTI-SPEED PLANETARY TRANSMISSION
    • EP4290098A3
    • 2024-03-06
    • EP23205284.5
    • 2017-09-19
    • Allison Transmission, Inc.
    • SCHOOLCRAFT, BrianRASZKOWSKI, James
    • F16H3/66
    • A multi-speed transmission (100, 300, 500) including a plurality of planetary gearsets (108, 110, 112, 114, 308, 310, 312, 314, 508, 510, 512, 514) and a plurality of selective couplers (162, 164, 166, 168, 170, 172, 362, 364, 366, 368, 370, 372, 562, 564, 566, 568, 570, 572) to achieve at least nine forward speed ratios is disclosed. The plurality of planetary gearsets may include a first planetary gearset (108, 308, 508), a second planetary gearset (110, 310, 510), a third planetary gearset (112, 312, 512), and a fourth planetary gearset (114, 314, 514). The plurality of selective couplers (162, 164, 166, 168, 170, 172, 362, 364, 366, 368, 370, 372, 562, 564, 566, 568, 570, 572) may include a number of clutches (166, 168, 170, 172, 366, 368, 370, 372, 566, 568, 570, 572) and a number of brakes (162, 164, 362, 364, 562, 564). The multi-speed transmission (100, 300, 500) may have four planetary gearsets (108, 110, 112, 114, 308, 310, 312, 314, 508, 510, 512, 514) and six selective couplers (162, 164, 166, 168, 170, 172, 362, 364, 366, 368, 370, 372, 562, 564, 566, 568, 570, 572). The six selective couplers (162, 164, 166, 168, 170, 172, 362, 364, 366, 368, 370, 372, 562, 564, 566, 568, 570, 572) may include four clutches (166, 168, 170, 172, 366, 368, 370, 372, 566, 568, 570, 572) and two brakes (162, 164, 362, 364, 562, 564).