Multi-speed transmission
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United States of America Patent
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Mar 14, 2006
Grant Date -
Sep 29, 2005
app pub date -
Mar 24, 2004
filing date -
Mar 24, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A planetary transmission includes four planetary gearsets, two of which are simple planetary gearsets and two of which are compound planetary gearsets. A first of the planetary gearsets has members selectively connectible with a ground or stationary member through a synchronizer clutch. A second, third, and fourth of the planetary gearsets have at least one member continuously interconnected with a ground or stationary member. A plurality of synchronizer clutches are employed between the planetary gearsets, which are manipulatable to establish at least seventeen forward speed ratios and one reverse speed ratio between an input shaft and an output shaft of the transmission.
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