A transmission system, such as for a two wheeled bicycle, having an input and an output, wherein the input is arranged to be connected to a crank and/or an electric motor and/or a user input, and wherein the output is arranged to be connected to a driven wheel. The system includes at least two parallel transmission paths from the input to the output, at least one of the transmission paths including at least one transmission, at least one of the transmission paths including at least one transmission clutch. At least one of the transmission paths includes at least one load-shifting clutch, the at least one load-shifting clutch being a form closed clutch arranged to transfer torque in at least one rotational direction.

An architecture for coupling the output of a prime mover to a rotationally driven device. The architecture includes a selectable switching device, a terminal output member and a torque transfer device having an intermediate output member. The selectable switching device is coupled to the output of the prime mover and is selectively and alternately coupled between first and second states; in the first state with the torque transfer device, whereby the torque transfer device is rotatably driven by the prime mover and the terminal output member is rotatably driven by the intermediate output member of the torque transfer device; and in the second state with the terminal output member, whereby the terminal output member is rotatably driven by the prime mover and the torque transfer device is rotatably disconnected from the prime mover and is not rotatably driven.

A transmission for a vehicle may include a first input shaft continuously receiving torque from a power source and having a first input transfer gear thereon, a second input shaft selectively receiving torque from the power source through a clutch and having a second input transfer gear thereon, a coupling member allowing or restricting rotation of the first input transfer gear relative to the first input shaft, a first countershaft and a second countershaft each having an output transfer gear to be engaged with the first input transfer gear and the second input transfer gear, and coupling devices selectively coupling the output transfer gears to corresponding countershafts and allowing torque from the power source to be transmitted to a desired shift gear by coupling output transfer gears connected to the desired shift gear in the output transfer gears to a corresponding countershaft in advance or after synchronization in shifting.

Methods and systems for a vehicle transmission are provided. A transmission system includes, in one example, an intermediate shaft rotationally coupled to an input shaft and an output shaft, wherein the input shaft is configured to receive rotational input from an electric machine. The system further includes a first gear coupled to the intermediate shaft, and a plurality of clutches coupled to the input shaft and the output shaft and configured to in a first mode, transfer power directly between a second gear coupled to the input shaft, the first gear, and a third gear coupled to the output shaft, and in a second mode, transfer power indirectly between the second gear, the first gear, and/or the third gear.

An assembly includes a transmission and an electric machine for a hybrid drive of a motor vehicle, and the transmission is a multi-stage standard transmission with first and second subtransmissions, each of which has a separate input shaft and shares an output shaft. Both input shafts are coupled to the shared output shaft via form locking shift elements of the subtransmissions. The assembly includes a first shiftable clutch which is allocated to a first input shaft such that the internal combustion engine is coupled to the first input shaft via the first shiftable clutch, and a second shiftable clutch which is allocated to the second input shaft such that the electric machine is coupled to the second input shaft via the second shiftable clutch. The electric machine is coupled to the internal combustion engine via a third shiftable clutch, and to the first input shaft via a fourth shiftable clutch.

A hybrid powertrain may include a first shifting module including a motor input shaft having a motor directly connected to the motor shaft and provided to form two shifting stages having the largest gear ratios in sequence among a series of shifting stages; a second shifting module including an engine input shaft concentrically mounted with the motor input shaft and connected to an engine through a main clutch, and provided to form the remaining shifting stages of the series of shifting stages; a center synchro mounted to intermit the motor input shaft and the engine input shaft; and a continuous variable device provided to implement a state in which the first shifting module forms a gear ratio smaller than a shifting stage having a small gear ratio among the shifting stages of the first shifting module by a continuously controlled friction force.

A hybrid transmission device (3, 56, 60, 64) may include a first transmission input shaft (12), a second transmission input shaft (14) mounted on the first transmission input shaft, at least one drive device (EM2), and precisely one connecting clutch (K3). Particularly, the connecting clutch (K3) may selectively rotationally fix the first transmission input shaft (12) to the second transmission input shaft (14).

A transmission arrangement (16) for a motor vehicle drive train (10) includes a first input shaft (24) connected or connectable to an internal combustion engine (12), a second input shaft (26) arranged coaxially to the first input shaft (24), an output shaft connected to the first input shaft (24) via a first plurality of engageable first gear-step gear sets (38, 42, 44) and connected to the second input shaft (26) via a second plurality of engageable second gear-step gear sets (36, 52), a first electric machine (56) connected to the second input shaft (26), a second electric machine (60) connected to the first input shaft (24), and a first clutch (K1) via which the first input shaft (24) and the second input shaft (26) are connectable to each other. The second gear-step gear sets include two alternately engageable gear-step gear sets (36, 52), via each of which an electric motor-driven operation is establishable by the first electric machine (56). The transmission arrangement (16) is configured such that an internal combustion engine-driven operation is establishable via one (36) of the two alternately engageable gear-step gear sets (36, 52) when the first clutch (K1) is engaged.

A hybrid transmission device includes at least one drive device (EM2) and a gear change transmission (4) having multiple forward gear steps (G1, G2, G3, G4, GE2). The forward gear steps (G1, G2, G3, G4, GE2) are distributed onto at least one first sub-transmission (36) and one second sub-transmission (38). At least one even forward gear step (G2, G4) and at least one odd forward gear step (G3) are arranged in the first sub-transmission (36).

A hybrid transmission device (3) may include at least one drive device (EM1, EM2), a first transmission input shaft (7), a second transmission input shaft (9) mounted on the first transmission input shaft (7), at least one countershaft (22), a plurality of gearwheels (10, 12, 14, 16, 18, 24, 26, 30, 32, 34), and at least two engagement devices (S1, S2, S3, S4). At least one first gearwheel is arranged on the first transmission input shaft (7), at least one second gearwheel is arranged on the second transmission input shaft (9), and at least one third gearwheel is arranged on the at least one countershaft (22). The engagement devices (S1, S2, S3, S4) are arranged on precisely two axes of rotation (A1, A2), including a first axis (A1) defined by the input shafts (7, 9) and a second axis (A2) defined by the at least one countershaft (22).