A transmission for a vehicle may include a first input shaft continuously receiving rotational power from a power source; a second input shaft selectively receiving the rotational power of the power source through a clutch; a first counter shaft and a second counter shaft connected to the first input shaft and the second input shaft through a transfer gear pair, respectively; a controlling device selecting the transfer gear pair to transfer the rotational power from the first input shaft and the second input shaft to the first counter shaft and the second counter shaft; a one-way clutch allowing the rotational power provided to the first input shaft to be transferred only from the first input shaft toward the first counter shaft.

A transmission for a motor vehicle has an input shaft, output shaft, first and second minus planetary gear sets, and first electric machine with a rotationally fixed stator and a rotatable rotor connectable to the input shaft. The first planetary gear set is stepped and has planet gears of a larger and a smaller effective diameter. In the first planetary gear set, first sun gear engages the larger planet gears and is connected or connectable to the rotor; second sun gear engages the smaller planet gears and is connected to a sun gear of the second planetary gear set and connectable to the input shaft; a carrier is connected to a ring gear of the second planetary gear set; and a ring gear is rotationally fixable. In the second planetary gear set, the carrier is connectable to the input shaft and the ring gear is connected to the output shaft.

A transmission for a vehicle includes: a first input shaft IS1 disposed to be selectively supplied with power from an engine E; a second input shaft IS2 disposed to be selectively supplied with power from the engine E; a motor M disposed to be always connected to either the first input shaft IS1 or the second input shaft IS2 through a transmission gear unit to transmit power; a first output shaft OS1 and a second output shaft OS2 disposed in parallel with the first input shaft IS1 and the second input shaft IS2; a first driven gear unit U1P including a plurality of driven gears; a second driven gear unit U2P including a plurality of driven gears; a plurality of synchronizer devices provided on the first output shaft OS1 and the second output shaft OS2; and a connecting device SL selectively connecting two driven gears to each other.

A transmission for a vehicle may include a first input shaft continuously receiving rotational power from a power source; a second input shaft selectively receiving the rotational power of the power source through a clutch; a first counter shaft and a second counter shaft connected to the first input shaft and the second input shaft through a transfer gear pair, respectively; a controlling device selecting the transfer gear pair to transfer the rotational power from the first input shaft and the second input shaft to the first counter shaft and the second counter shaft; a one-way clutch allowing the rotational power provided to the first input shaft to be transferred only from the first input shaft toward the first counter shaft.

A transmission (1) for a motor vehicle includes at least one input shaft (2) which can be connected to an internal combustion engine (VM) in a rotationally fixed manner and with at least one input shaft power transmission element, a first shaft (3) including at least one power transmission element, a second shaft (4) including at least one other power transmission element, and a transmission output shaft (5) which is engaged with the first shaft (3) and the second shaft (4). The transmission (1) includes at least one gear plane (RE), in which the at least one input shaft power transmission element is engaged with the at least one power transmission element and with the at least one other power transmission element. The transmission (1) includes precisely two gear planes, and the power transmission element and the other power transmission element are each an idler gear.

Methods and systems are provided for operating a powertrain or driveline of a hybrid vehicle that includes two electric machines and a transmission are described. In one example, vehicle propulsion is maintained while transmission operating parameters are determined for improving transmission operation. In particular, a rear drive unit maintains vehicle speed and monitors torque delivered via an output of the transmission.

A transmission may include a first input shaft continuously receiving torque from a power source; a second input shaft selectively receiving torque from the power source through a clutch; a first countershaft and a second countershaft connected with the first input shaft and the second input shaft, respectively, by a transfer gear pair; coupling devices transmitting torque to the first countershaft and the second countershaft from the first input shaft and the second input shaft by selecting the transfer gear pairs; a one-way clutch disposed on the first countershaft to allow torque provided to the first input shaft to be transmitted only to the first countershaft from the first input shaft; and a shifting mechanism including a plurality of shift gear pairs having different gear ratios on the first countershaft, the second countershaft, and the output shaft.

An automated manual transmission includes: a first input shaft configured to receive rotation power from a power source via a main clutch and a second input shaft configured to always receive the rotation power from the power source. A gearbox part is configured to have a plurality of shifting gear pairs having different gear ratios engaged with the first input shaft and an output shaft and select the shifting gear pair suited for a driving speed by a synchronizer. A counter shaft is configured to be disposed in parallel with the output shaft, and an assist input gear is configured to be coupled with the counter shaft via an assist clutch and engaged with an output gear provided at the output shaft to form a gear ratio of a specific shifting stage.

A bicycle shifting device includes a first shifting mechanism, a transmission mechanism, and a setting mechanism. The setting mechanism sets paths in the transmission mechanism to transmit rotation from an input body to an output body at transmission ratios of at least three steps. The transmission mechanism establishes a first path transmitting the rotation at one of first and second transmission ratios by changing a rotational speed with the first shifting mechanism, and a second path transmitting the rotation at a greater transmission ratio than the first and second transmission ratios by changing the rotational speed with a different shifting mechanism from the first shifting mechanism. The first path includes first and second planetary mechanisms. The setting mechanism sets the transmission mechanism so that the rotational speed is not changed by the first planetary mechanism in the second path.

A transmission for a vehicle is provided to reduce a full length and a weight of the transmission. The transmission includes: first and second input shafts, output and transfer shafts disposed in parallel with the first and second input shafts; a transfer idler shaft to reduce rotational power transmitted to the transfer shaft and transfer the reduced rotational power to the output shaft via a gear structure; and a shaft gear apparatus. The shift gear apparatus selects a gear pair suitable for a traveling speed by a synchronizer by meshing gear pairs with: the first input shaft and the output shaft, the second input shaft and the output shaft, and the first input shaft and the transfer shaft. In particular, the gear pairs include a gear pair to form a lowermost stage, a gear pair forming an upper most stage, and a gear pair for forming a reverse stage.