| 摘要 |
A rotary power transmission has gear trains each being one of a set providing a series of increasing speed ratios, and two clutches (13, 14) independently operable and providing alternative drive paths through the gear trains between a common input (11) and a common output (21); the gear trains of alternate ratios in the set are driven respectively through one and the other clutch, a hydrodynamic coupling (12) being provided in series with the clutch (14) of the odd speed ratios only. |
