Abstract: A transmission control apparatus may include a determination device that determines a predicted running load on a predetermined section of a road ahead of the vehicle by use of information regarding a grade and a curvature of the predetermined section of the road ahead of the vehicle and determines fuel consumptions for respective gears, based on the predicted running load, a determination device that determines a final gear, based on the determined fuel consumptions for respective gears, and a controller that performs gear shift control for the vehicle, based on the final gear.

Abstract: A vehicle transmission is provided that improves fuel efficiency through multiple speed stages and enhances silent drivability of a vehicle using an operating point in a low RPM range of an engine. The vehicle transmission combines three simple planetary gear units with a single compound planetary gear set or combines five simple planetary gear units to shift gears while changing rotational speeds and directions by a selective intermittence operation using rotation elements of the planetary gear units and a plurality of friction elements. Through such a shift operation, it is possible to form at least forward 10-speed or more and reverse 1-speed gear ratios for driving of the vehicle.

Abstract: A power transmission system of a vehicle may include a first input shaft selectively connected to an engine, a second input shaft as a hollow shaft, enclosing the first input shaft without rotational interference with the first input shaft, and selectively connected to the engine, a speed change portion including first and second planetary gear sets, each planetary gear set including three rotation elements, and four rotation shafts directly connected to at least one rotation element among the rotation elements of the first and second planetary gear sets, a motor/generator, an output shaft, and control elements including two clutches disposed at positions where the first and second input shafts are selectively connected to an output shaft of the engine, and two brakes disposed at positions where two rotation shafts among the four rotation shafts are selectively connected to a transmission housing.

Abstract: A shifting control method for controlling a speed change of a vehicle in a downhill section may include collecting, by a forward road grade information collection device, information on a downhill grade which is present ahead of a vehicle, before a vehicle enters a downhill section, determining, by a driving information detection device, whether a predetermined inertial driving condition is satisfied, before the vehicle enters the downhill section, and deciding, by a control device, a shifting mode of the vehicle depending on the downhill grade, and controlling a transmission according to the decided shifting mode, at a predetermined time before the vehicle enters the downhill section.

Abstract: A coasting neutral control apparatus associated with a speed camera may include a communication terminal configured to acquire speed camera enforcement section information, and a controller configured to perform or interrupt coasting neutral control by determining whether a predetermined execution condition for the coasting neutral control is satisfied using the speed camera enforcement section information.

Abstract: A multi-stage transmission for a vehicle is provided. The multi-stage transmission includes an input shaft and an output shaft. A first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set each have three rotary elements and transmit torque between the input shaft and the output shaft. At least six shifting elements are connected with the rotary elements of the planetary gear sets. Accordingly, fuel efficiency is improved by implementing multi-stages in an automatic transmission and vehicle driving comfort is improved by using operating points in a low RPM range of an engine.

Abstract: A power transmission apparatus for a vehicle is disclosed. The power transmission apparatus includes a first input shaft selectively connected to an engine output shaft through a first clutch, a second input shaft configured as a hollow shaft that is disposed on the outer circumference of the first output shaft without rotational interference and selectively connected to the engine output shaft through a second clutch, a third input shaft configured as a hollow shaft that is disposed on the outer circumference of the second output shaft without rotational interference and selectively connected to the engine output shaft through a third clutch. The transmission apparatus further comprises an output shaft placed parallel to the first, second, and third input shafts at a certain distance.

Abstract: 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 torque, 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, and a fourth planetary gear set having tenth, eleventh, and twelfth rotation elements. The planetary gear train may further include a first plurality of shafts each fixedly connected with at least one of the rotation elements from the first, second, third, or fourth planetary gear sets, a second plurality of shafts, each selectively connected to a transmission housing and fixedly connected to a rotation element of the first and third planetary gear sets that is not fixedly connected with any of the first plurality of shafts.

Abstract: A multi-stage transmission for a vehicle, may include an input shaft and an output shaft; a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set provided to transfer a torque between the input shaft and the output shaft and each including three rotation elements; and seven shifting elements connected to the rotation elements of the planetary gear sets.

Abstract: A power transmission apparatus for a vehicle includes: an engine output shaft; a first transmission outputting torque shifted to two shift stages to a central output shaft; and a second transmission outputting torque shifted to multiple shift stages. The second transmission includes: a first input shaft disposed on the same shaft line as that of the central output shaft; a second input shaft disposed on an outer circumference of the first input shaft a third input shaft disposed in parallel with the first and second input shafts; an idle shaft disposed in parallel with the first and second input shafts and spaced apart from the first and second input shafts; and an output shaft disposed in parallel with the first and third input shafts and the idle shaft between the first and third input shafts and the idle shaft.

Abstract: A planetary gear train may include input and output shafts, first to fourth planetary gear sets respectively having first to third, fourth to sixth, seventh to ninth, and tenth to twelfth elements, a first shaft connected to the second element and selectively connectable to the input shaft, a second shaft connected to the fourth element, selectively connectable to the input shaft and a transmission housing, a third shaft connected to the fifth and ninth element, selectively connectable to the input shaft and the transmission housing, a fourth shaft connected to the third and eleventh elements and the output shaft, a fifth shaft connected to the first, sixth, eighth, and tenth elements, a sixth shaft connected to the seventh element, and a seventh shaft connected to the twelfth element and selectively connectable to the transmission housing.

Abstract: A vehicle may include an engine; a transmission; an accelerator pedal position sensor; a steering wheel; a steering angle sensor; and a processor configured to control the engine according to a position of an accelerator pedal detected by the accelerator pedal position sensor and to shift the transmission to a neutral state when a position of the accelerator pedal coincides with a reference position while the transmission is in a driving state, wherein the processor shifts the transmission to a driving state when a steering angle of the steering wheel detected by the steering angle sensor is equal to or greater than a reference angle while the transmission is in a neutral state.

Abstract: A multi-stage transmission for a vehicle includes: a first planetary gear set and a second planetary gear set each including three rotating elements; a compound planetary gear set including four rotating elements; and eight rotation shafts connected to the rotating elements of the planetary gear sets.

Abstract: A power transmission apparatus includes: a first input shaft; a second input shaft coaxially disposed with the first input shaft and selectively connected with the first input shaft; a third input shaft coaxially disposed with the second input shaft and selectively connected with the first input shaft; a first output shaft in parallel with the first input shaft; a second output shaft arranged in series to and selectively connected with the first output shaft; a first shift-stage shifting section outputting two shifted torques from the third input shaft to the first output shaft; a second shift-stage shifting section outputting one shifted torque and one reverse torque from the second input shaft to the first output shaft; and a compound shifting section outputting a shifted output torque from a received torque selectively from the first input shaft or the first output shaft.

Abstract: A planetary gear train of an automatic transmission includes an input shaft for receiving an engine torque; an output shaft for outputting a torque; a first planetary gear set having first, second, and third rotational elements; a second planetary gear set having fourth, fifth, and sixth rotational elements; a third planetary gear set having seventh, eighth, and ninth rotational elements; and a fourth planetary gear set having tenth, eleventh, and twelfth rotational elements. The gear train further includes a first shaft and a second shaft each selectively connected with the input shaft; a third shaft fixedly connected with the output shaft; a fourth shaft fixedly connected with the first, sixth and eighth elements; a fifth shaft fixedly connected with the ninth and tenth elements; and a plurality of shafts, each selectively connected to the transmission housing and fixedly connected to one of the rotational elements of the planetary gear sets.

Abstract: 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 torque; a direction changer disposed on an input shaft side and transmitting the torque of the engine to the input shaft with or without change of rotation direction, or disposed on an output shaft side and outputting the torque of the output shaft with or without change of rotation direction; a first planetary gear set including first, second and third rotation elements; a compound planetary gear set including fourth, fifth, sixth, and seventh rotation elements by combining second and third planetary gear sets; a fourth planetary gear set including eighth, ninth, and tenth rotation elements.

Abstract: A planetary gear train apparatus of an automatic transmission may include input and output shafts, first to fourth planetary gear sets respectively having first to third, fourth to sixth, seventh to ninth, and tenth to twelfth elements, a first shaft fixed with the third element, and selectively connectable to the input shaft, a second shaft fixed with the fourth element, and selectively connectable to the input shaft, a third shaft fixed with the eleventh element and the output shaft, a fourth shaft fixed with the first, sixth, and ninth elements, a fifth shaft fixed with the seventh and twelfth elements, and shafts, each of which is selectively connectable to a housing and fixed to an element of the first to fourth gear sets which is not fixed with of the first to fifth shafts.

Abstract: A planetary gear train of an automatic transmission for a vehicle may include an input shaft for receiving an engine torque, an output shaft for outputting a shifted torque, a first planetary gear set, a second planetary gear set, a third planetary gear set, a fourth planetary gear set, six control elements, a first connecting member directly connected with a transmission housing, a second connecting member selectively connectable with the transmission housing, a third connecting member selectively connectable with the input shaft, a fourth connecting member directly connected with the input shaft, a fifth connecting member selectively connectable with the transmission housing, a sixth connecting member selectively connectable with the input shaft, and selectively connectable with the transmission housing, a seventh connecting member directly connected with the output shaft, and an eighth connecting member selectively connectable with the input shaft.

Abstract: A planetary gear train may include input and output shafts, first to fourth planetary gear sets respectively having first to third, fourth to sixth, seventh to ninth, and tenth to twelfth elements, a first shaft connected to the fifth and eighth elements, and selectively connectable to the input shaft, a second shaft connected to the tenth element, and selectively connectable to the input shaft, a third shaft connected to the ninth element the output shaft, a fourth shaft connected to the third and twelfth elements, a fifth shaft connected to the seventh and eleventh elements, and a plurality of shafts each selectively connecting a corresponding element to a transmission housing, the corresponding element being an element of the first and second planetary gear sets which is not interconnected.

Abstract: A multi-stage transmission for a vehicle is provided. The multi-stage transmission includes an input shaft, an output shaft, and first, second, third, fourth and fifth planetary gear devices that are disposed between the input shaft and the output shaft to transmit rotary force. Each of the first, second, third, fourth and fifth planetary gear devices have three rotary elements, and six shifting elements that are connected to the rotary elements of the first, second, third, fourth and fifth planetary gear devices.