Continuously variable multi-range powertrain with a geared neutral
AssigneeGeneral Motors Corporation
InventorMichael Roland Schmidt
Life of this patent
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AssigneeGeneral Motors Corporation
InventorMichael Roland Schmidt
Estimating the term…
A powertrain has an engine, a multi-range continuously variable transmission (CVT) and a final drive mechanism. The CVT has a continuously variable unit (CVU) and a planetary gear set. A plurality of friction devices that are selectively connectable to establish three forward ranges and one reverse range wherein the CVU is effective to provide infinitely variable ratios between the engine and the final drive mechanism. One friction device is engaged during a geared neutral condition, a first forward range and a reverse range. The neutral condition is established by setting the CVU at a predetermined ratio. The reverse range is operated by changing the CVU ratio toward a maximum underdrive ratio from the neutral condition and the first forward range is operated by changing the CVU ratio toward a maximum overdrive ratio. The second and third forward ranges are established by synchronously interchanging friction devices.
A powertrain having a prime mover, a continuously variable transmission and a final drive mechanism, said continuously variable transmission comprising:
Dependencies are inferred from the claim text.