The invention relates to a transmission (100) for a hybrid drive arrangement which can be coupled to two drive assemblies (7, 8), comprising an input shaft (10), and an output shaft (11), at least one first, second, third and fourth shifting element (SE1, SE2, SE3, SE4), and at least one first planetary gear (5) and one second planetary gear (6). The input shaft (10) can be coupled to the ring gear planet carrier of the first planetary gear (5) by means of the first shifting element (SE1) and the output shaft (11) is coupled to the planet carrier of the first planetary gear (5). The planet carrier of the first planetary gear (5) can be coupled to the ring gear of the second planetary gear (6) by means of the second shifting element (SE2) and the planet carrier of the first planetary gear (5) can be coupled to the sun gear of the second planetary gear (6) by means of the third shifting element (SE3). The sun gear of the first planetary gear (5) can be coupled to the sun gear of the second planetary gear (6) by means of the fourth shifting element (SE4).

A control apparatus for a vehicular transmission including at least one dog clutch each having a first dog member mounted on a first shaft such that the first dog member is rotated together with the first shaft, and at least one second dog member each mounted to be axially adjacent to the first dog member and rotatable relative to the first shaft, first gears each mounted to be rotatable relative to the first shaft and provided with the second dog member, second gear which are mounted such that the second gears are rotated together with a second shaft parallel to the first shaft, and which mesh with the respective first gears, and a shifting mechanism for selectively placing each dog clutch in an engaged or released state. The control apparatus includes: a first calculating portion for detecting to a rotary angular position of the first shaft, and calculating a rotary angular position of the first dog member on the basis of the detected rotary angular position of the first shaft; a second calculating portion for detecting a rotary angular position of the second shaft, and calculating a rotary angular position of each second dog member on the basis of the detected rotary angular position of the second shaft; and an engagement control portion for controlling the shifting mechanism on the basis of the rotary angular positions of the first and second dog members, for engagement of the first and second dog members with each other.

A modular hybrid transmission configurable between a 9-speed configuration and an 8-speed configuration includes first, second, third, and fourth planetary gear sets each having first, second, and third elements. Seven torque transmitting devices are each selectively engageable to interconnect one of the first, second, and third elements of one of the planetary gear sets directly with (i) one of the first, second, and third elements of another one of the planetary gear sets, (ii) a housing, or (iii) an input member. The seven torque transmitting devices are selectively engageable to establish nine forward speed ratios and at least one reverse speed ratio. Upon removal of a fourth torque transmitting device, the transmission is arranged in the 8-speed configuration and the remaining six torque transmitting devices are selectively engageable to establish eight forward speed ratios and at least one reverse speed ratio.

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

The multi-stage transmission for an electric vehicle may include an input shaft to which a motor is configured to be coupled; an output shaft mounted in parallel with the input shaft; N shift gear pairs mounted on the input shaft and the output shaft and circumscribed with each other, to form N gear shifting stages; 2N-2 engagement clutch mechanisms mounted to select any one of the shift gear pairs to allow a power transmittable state between the input shaft and the output shaft to be switched by an gear engagement; N-1 coupling gear pairs mounted on the input shaft and the output shaft and circumscribed with each other; and N-1 friction clutch mechanisms mounted to select a coupling gear pair to allow a power transmission between the input shaft and the output shaft to be continuously varied by a frictional force.

A road vehicle with hybrid drive having: at least one pair of drive wheels; an internal combustion engine; a reversible electric machine; and a dual-clutch transmission. The dual-clutch transmission has: a first primary shaft and a second primary shaft; a first clutch interposed between the internal combustion engine and the first primary shaft; and a second clutch interposed between the internal combustion engine and the second primary shaft; a third clutch, which is interposed between a shaft of the electric machine and the first primary shaft so as to connect/disconnect the shaft of the electric machine to/from the first primary shaft; and a fourth clutch, which is interposed between the shaft of the electric machine and the second primary shaft so as to connect/disconnect the shaft of the electric machine to/from the second primary shaft.

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

A modular hybrid transmission configurable between a 9-speed configuration and an 8-speed configuration includes first, second, third, and fourth planetary gear sets each having first, second, and third elements. Seven torque transmitting devices are each selectively engageable to interconnect one of the first, second, and third elements of one of the planetary gear sets directly with (i) one of the first, second, and third elements of another one of the planetary gear sets, (ii) a housing, or (iii) an input member. The seven torque transmitting devices are selectively engageable to establish nine forward speed ratios and at least one reverse speed ratio. Upon removal of a fourth torque transmitting device, the transmission is arranged in the 8-speed configuration and the remaining six torque transmitting devices are selectively engageable to establish eight forward speed ratios and at least one reverse speed ratio.

A power transmission apparatus may include a motor/generator having a rotor selectively connectable to an engine output shaft, a first input shaft mounted coaxial with the engine output shaft and selectively connectable to the rotor, a second input shaft external to the first input shaft and fixedly connected to the rotor, an intermediate shaft parallel with the input shafts, first and second output shafts receiving torques from the first and second input shafts, and outputting a shifted torque based on the received torques, a planetary gear set mounted on the first output shaft, having a sun gear fixedly connected to the first output shaft, selectively receiving torques from the first and second input shafts and the intermediate shaft, and outputting a shifted torque based on the received torques to the first output shaft, and a plurality of gear sets allowing torque flows between the various shafts.

A power transmission apparatus may include a motor/generator having a rotor selectively connectable to an engine output shaft, a first input shaft mounted coaxial with the engine output shaft and selectively connectable to the rotor, a second input shaft external to the first input shaft and fixedly connected to the rotor, an intermediate shaft parallel with the input shafts, first and second output shafts receiving torques from the first and second input shafts, and outputting a shifted torque based on the received torques, a planetary gear set mounted on the first output shaft, having a sun gear fixedly connected to the first output shaft, selectively receiving torques from the first and second input shafts and the intermediate shaft, and outputting a shifted torque based on the received torques to the first output shaft, and a plurality of gear sets allowing torque flows between the various shafts.