A multiple speed transmission includes an input member, an output member, first, second, third and fourth planetary gearsets each having first, second and third members, and a plurality of interconnecting members each connected between at least one of the first, second, third, and fourth planetary gearsets and at least another of the first, second, third, and fourth planetary gearsets. The transmission includes a plurality of torque-transmitting mechanisms between the input and output members, wherein the torque transmitting mechanisms are selectively engageable in combinations of at least four to establish at least ten forward speed ratios between the input member and the output member.

A multiple speed transmission includes an input member, an output member, first, second, third and fourth planetary gearsets each having first, second and third members, and a plurality of interconnecting members each connected between at least one of the first, second, third, and fourth planetary gearsets and at least another of the first, second, third, and fourth planetary gearsets. The transmission includes a plurality of torque-transmitting mechanisms between the input and output members, wherein the torque transmitting mechanisms are selectively engageable in combinations of at least four to establish at least ten forward speed ratios between the input member and the output member.

A drive transmission device includes a clutch mechanism. The clutch mechanism includes a drive transmission member that is coupled to a first rotation member via a torque limiter and is arranged in a fitting part of a second rotation member and a third rotation member, and a transmission member moving part that includes a first gap and a second gap, the first gap being formed in the fitting part and having a width wider than the thickness of the drive transmission member and the second gap being formed in the fitting part and having a width that is equal to or smaller than the thickness of the drive transmission member, the transmission member moving part being formed in such a way that the width thereof becomes smaller about a rotation axis in the fitting part.

A planetary gear train of an automatic transmission for a vehicle may include an input shaft receiving torque of an engine, an output shaft outputting changed torque of the engine, a first planetary gear set including first, second, and third rotation elements, a second planetary gear set including fourth, fifth, and sixth rotation elements, a third planetary gear set including seventh, eighth, and ninth rotation elements, a fourth planetary gear set including tenth, eleventh, and twelfth rotation elements, and seven friction elements disposed to selectively connect the rotation elements with each other and selectively connect the rotation elements with a transmission housing.

An automatic transmission includes a second planetary gear mechanism having a sun gear, a carrier, and a ring gear being defined as first, second and third elements, respectively, when a single pinion type planetary gear mechanism is applied; the carrier, the ring gear, and the sun gear being defined as the first, second, and third elements, respectively, when a double pinion type is applied; a first brake, a switching clutch being switchable to a first position where the third element is selectively fixed to a housing; a first clutch, a second clutch, a third clutch, and a fourth clutch. The first brake fixes a sun gear of a first planetary gear mechanism to the housing, the switching clutch fixes the third element to the housing, and the fourth clutch connects the second element to a carrier of the third planetary gear mechanism when establishing a reverse speed stage.

A phasing system is provided. A phase angle between the gear hub and the cradle rotor can be driven by a planetary actuator. In some non-limiting examples, an input shaft rotationally coupled between a rotary actuator for rotation therewith. Rotation of the input shaft can unlock relative rotation between the cradle rotor and the gear hub. In some non-limiting examples, the phasing system can include a gear hub and a cradle rotor, and a torsion spring arrange therebetween. The torsion spring can be configured to apply an internal torque load between the gear hub and the cradle rotor to offset an external torque load applied to the gear hub or the cradle rotor.

A transmission is disclosed having an input member, an output member, a plurality of planetary gear sets, a plurality of interconnecting members and a plurality of torque-transmitting mechanisms including a one-way clutch. The plurality of planetary gear sets has first, second and third members. The input member is continuously interconnected with a member of the planetary gear sets. The output member is continuously interconnected with another member of the planetary gear sets. At least eight forward speeds and one reverse speed are produced by the selective engagement of the five torque-transmitting mechanisms.

An automatic transmission has a first clutch shaft that constantly connects first and fourth planetary gear sets, a second clutch shaft that constantly connects second and third planetary gear sets, and a third clutch shaft that constantly connects the third and first planetary gear sets. A drive shaft is constantly connected to the fourth planetary gear set; an output shaft is constantly connected to the third planetary gear set. The first planetary gear set is directly connected to two shift elements, the second planetary gear set is directly connected to four shift elements, the third planetary gear set is directly connected to two shift elements, the fourth planetary gear set is directly connected to four shift elements. The drive shaft is directly connected to only one shift element. The output shaft is directly connected to only one shift element.

An automatic transmission has eight rotatable shafts, four planetary gear sets and seven shift elements for shifting several forward gears and one reverse gear. A first element of the second planetary gear set forms the first shaft designed as the drive shaft of the transmission. A second element of the third planetary gear set forms the second shaft designed as the output shaft of the transmission. A second element of the first planetary gear set forms the third shaft. A first element of the first planetary gear set forms the fourth shaft. A third element of third planetary gear set forms the fifth shaft. As the sixth shaft, a third element of the first planetary gear set, a second element of the second planetary gear set and a first element of the third planetary gear set are constantly connected. A third element of the second planetary gear set forms the seventh shaft. A first brake is arranged in the power flow between the third shaft and the housing. A second brake is arranged in the power flow between the fourth shaft and the housing, a third brake is arranged in the power flow between the fifth shaft) and the housing. A first clutch (C1) is arranged in the power flow between the first and the seventh shafts. A second clutch is arranged in the power flow between the first and third shafts. A third clutch is constantly connected to the eighth shaft. A fourth clutch is in the power flow between the first and fourth shafts.

A planetary gear train of an automatic transmission includes an input shaft; an output shaft; a first planetary gear set having first to third rotating elements; a second planetary gear set having fourth to sixth rotating elements; a third planetary gear set having seventh to ninth rotating elements; a fourth planetary gear set having tenth to twelfth rotating elements; and seven control elements, wherein the input shaft is continuously connected with the second rotating element, the output shaft is continuously connected with the eleventh rotating element, the second rotating element is continuously connected with the fourth rotating element, the third rotating element is continuously connected with the tenth rotating element, the sixth rotating element is continuously connected with the seventh rotating element, the ninth rotating element is continuously connected with the twelfth rotating element, the third rotating element and the eighth rotating element are selectively connected.