| 摘要 |
A two-speed centrifugally shifted automatic transmission provides an overdrive output shaft rotational speed that may be three times the rotational speed of the input shaft (12). A shift point at a partial speed may provide a direct drive through an overrunning clutch (33). A spline mounted shift engagement ring (46) is adapted to slide axially within housing (10) to restrain planet carrier ring (36) from rotating at start-up. After reaching a predetermined input shaft rotational speed, the shift engagement ring (46) moves to its extreme left position (FIG. 1), thereby allowing the planet carrier ring (36) to rotate and the rotational speed of the output shaft (14) to be driven by the overrunning clutch (33).
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