Abstract: A power train for a vehicle may include a differential case; a differential ring gear aligned to be concentric to the differential case, and provided in a relatively rotatable state therebetween; and a connection/disconnection mechanism provided to connect or disconnect the differential ring gear and the differential case in a state where power is transferred thereto.

Abstract: A powertrain for an electric vehicle, may include: an input shaft and an output shaft mounted in parallel to each other; first and second power transmission mechanisms provided to transmit power from the input shaft to the output shaft at two gear ratios different from each other; a one-way clutch included in the first power transmission mechanism; a friction clutch included in the second power transmission mechanism; and a bypass mechanism provided to form a power transmission path that bypasses the one-way clutch and a power transmission path that bypasses the friction clutch.

Abstract: An exemplary differential apparatus for a vehicle includes: a compound planetary gear set and a planet carrier. In particular, the compound planetary gear set is formed as a combination of first and second planetary gear sets, the first planetary gear set is formed as a single pinion planetary gear set having a first sun gear and a plurality of first pinion gears, and the second planetary gear set is formed as a double pinion planetary gear having a second sun gear disposed coaxially and in parallel with the first sun gear, the plurality of first pinion gears shared with the first planetary gear set, and a plurality of second pinion gears. The planet carrier has an exterior circumference connected to an external gear and is connected to first and second pinion shafts that rotatably support the first and second pinion gears of the second planetary gear set.

Abstract: A power transmission apparatus for an electric vehicle including a motor as a power source may include: a compound planetary gear set formed as a combination of first and second planetary gear sets sharing a sun gear and a plurality first pinion gears; a first brake selectively connecting a first ring gear of the first planetary gear set to a transmission housing; and a second brake selectively connecting the shared sun gear of the first and second planetary gear sets to the transmission housing. In particular, a second ring gear of the second planetary gear set is fixedly connected to a rotor of the motor and thus continuously receives a torque of the motor, and the power transmission apparatus outputs a shifted torque through a planet carrier rotatably supporting the plurality of first pinion gears and a plurality of second pinion gears of the first planetary gear set.

Abstract: An exemplary differential apparatus for a vehicle includes: a compound planetary gear set and a planet carrier. In particular, the compound planetary gear set is formed as a combination of first and second planetary gear sets, the first planetary gear set is formed as a single pinion planetary gear set having a first sun gear and a plurality of first pinion gears, and the second planetary gear set is formed as a double pinion planetary gear having a second sun gear disposed coaxially and in parallel with the first sun gear, the plurality of first pinion gears shared with the first planetary gear set, and a plurality of second pinion gears. The planet carrier has an exterior circumference connected to an external gear and is connected to first and second pinion shafts that rotatably support the first and second pinion gears of the second planetary gear set.

Abstract: A power transmission apparatus for an electric vehicle including a motor as a power source may include: a compound planetary gear set formed as a combination of first and second planetary gear sets sharing a sun gear and a plurality first pinion gears; a first brake selectively connecting a first ring gear of the first planetary gear set to a transmission housing; and a second brake selectively connecting the shared sun gear of the first and second planetary gear sets to the transmission housing. In particular, a second ring gear of the second planetary gear set is fixedly connected to a rotor of the motor and thus continuously receives a torque of the motor, and the power transmission apparatus outputs a shifted torque through a planet carrier rotatably supporting the plurality of first pinion gears and a plurality of second pinion gears of the first planetary gear set.

Abstract: A method for improving fuel-efficiency during a temporary stop may include dividing, by an engine control apparatus, a neutral control condition into a neutral control entry and a neutral control release during a D-stage temporary stop, determining, a neutral control entry D-stage target RPM at a time of the neutral control entry, and a neutral control release D-stage target RPM at a time of the neutral control release, and RPM shifting the neutral control entry D-stage target RPM to a speed gradient conforming to a transmission clutch release time of a transmission control apparatus at a time of a neutral control after the neutral control entry and RPM shifting the neutral control release D-stage target RPM to a speed gradient conforming to a clutch coupling time of a transmission by the transmission control apparatus at a time of a neutral control after the neutral control release.

Abstract: A gear train may include an input shaft adapted to receive torque of an engine, an output shaft adapted to output changed torque, a first planetary gear set including a first sun gear, a first planet carrier, and a first ring gear as rotation elements thereof, a second planetary gear set including a second sun gear, a second planet carrier, and a second ring gear as rotation elements thereof, and a third planetary gear set including a third sun gear, a third planet carrier, and a third ring gear as rotation elements thereof.

Abstract: A method for improving fuel-efficiency during a temporary stop may include dividing, by an engine control apparatus, a neutral control condition into a neutral control entry and a neutral control release during a D-stage temporary stop, determining, a neutral control entry D-stage target RPM at a time of the neutral control entry, and a neutral control release D-stage target RPM at a time of the neutral control release, and RPM shifting the neutral control entry D-stage target RPM to a speed gradient conforming to a transmission clutch release time of a transmission control apparatus at a time of a neutral control after the neutral control entry and RPM shifting the neutral control release D-stage target RPM to a speed gradient conforming to a clutch coupling time of a transmission by the transmission control apparatus at a time of a neutral control after the neutral control release

Abstract: A gear train may include an input shaft adapted to receive torque of an engine, an output shaft adapted to output changed torque, a first planetary gear set including a first sun gear, a first planet carrier, and a first ring gear as rotation elements thereof, a second planetary gear set including a second sun gear, a second planet carrier, and a second ring gear as rotation elements thereof, and a third planetary gear set including a third sun gear, a third planet carrier, and a third ring gear as rotation elements thereof.

Abstract: A planetary gear train of an automatic transmission may include: an input shaft; an output shaft; a first planetary gear set including first, second, and third elements disposed on the input shaft with two elements selectively connected to the input shaft; a second planetary gear set including fourth, fifth, and sixth elements disposed on the output shaft with two elements selectively connected to the input shaft, two elements connected to two elements of the first planetary gear set, and one element directly connected to the output shaft; four transfer gears selectively meshing the fourth, fifth, and sixth elements with the input shaft and the first planetary gear set; and six friction members including four clutches variably connecting the first planetary gear set and the second planetary gear set to the input shaft and two brakes variably connecting selected elements to a transmission housing.

Abstract: The present invention relates to a carrier cup of a planet carrier that improves strength thereof and reduces noise occurring in an automatic transmission by changing an interior circumferential shape of a leg. The carrier cup of a planet carrier according to an exemplary embodiment of the present invention at which pinion gears are mounted such that the pinion gears are rotatably supported thereby may include a carrier plate provided with a carrier hole for mounting a carrier shaft and a plurality of pinion holes for mounting the pinion gears, and a plurality of legs extending perpendicularly from one side surface of the carrier plate, wherein radial thickness of the leg is changed along a circumferential direction thereof.

Abstract: The present invention relates to a carrier cup of a planet carrier that improves strength thereof and reduces noise occurring in an automatic transmission by changing an interior circumferential shape of a leg. The carrier cup of a planet carrier according to an exemplary embodiment of the present invention at which pinion gears are mounted such that the pinion gears are rotatably supported thereby may include a carrier plate provided with a carrier hole for mounting a carrier shaft and a plurality of pinion holes for mounting the pinion gears, and a plurality of legs extending perpendicularly from one side surface of the carrier plate, wherein radial thickness of the leg is changed along a circumferential direction thereof.