Abstract: A turbofan engine includes a fan section. A turbine section is in driving engagement with the fan section through a star gear system. The star gear system includes a plurality of star gears surrounding a sun gear. A carrier supports the plurality of star gears and includes a first carrier bearing flange. A ring gear surrounds the plurality of star gears and includes a ring gear bearing flange. At least one ring gear carrier bearing engages the carrier bearing flange and the ring gear bearing flange. A speed change mechanism for a gas turbine engine is also disclosed.

Abstract: An angle calculation unit calculates a motor angle based on a motor rotation angle signal acquired from a motor rotation angle sensor that detects a rotational position of a motor. An acceleration variation calculation unit calculates an acceleration variation parameter related to an amount of variation in motor acceleration, based on the motor angle. An idle running determination unit determines the end of an idle running state in which the motor is rotating within the range of play, based on the acceleration variation parameter. A target setting unit sets a target motor angle by adopting an angle correction value that is a value corresponding to the motor angle at the end of the idle running state. A drive control unit controls the drive of the motor such that the motor angle becomes the target motor angle.

Abstract: A multi-pump driven single-motor hydro-mechanical hybrid transmission device includes an input shaft, a planetary gear split mechanism, a hydraulic transmission system, a planetary gear convergence mechanism, and an output shaft. The input shaft is connected to the hydraulic transmission system and the planetary gear convergence mechanism through the planetary gear split mechanism. The hydraulic transmission system and the planetary gear convergence mechanism are both connected to the output shaft. The hydraulic transmission system includes a multi-pump driving mechanism, a fixed displacement motor mechanism, and a hydraulic transmission output mechanism. The multi-pump driving mechanism is connected to the fixed displacement motor mechanism. The fixed displacement motor mechanism is connected to the planetary gear convergence mechanism and is connected to the output shaft through the hydraulic transmission output mechanism.

Abstract: A vehicle power transmission device includes: a continuously variable transmission including a primary pulley, a secondary pulley, and a transmission belt wound between the primary pulley and the secondary pulley; a belt running clutch of hydraulic type for transmitting power to the continuously variable transmission; and a hydraulic control circuit controlling the continuously variable transmission and the belt running clutch. The hydraulic control circuit includes a fail-safe valve switching a communication destination of an oil supply passage for supplying a hydraulic fluid to the belt running clutch to one of a first oil passage supplied with a control hydraulic pressure and a second oil passage supplied with a hydraulic pressure higher than the control hydraulic pressure, the fail-safe valve connecting the oil supply passage with the second oil passage when the fail-safe valve is switched to a failure position. The second oil passage is provided with an orifice.

Abstract: 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 and one second shifting element (SE1, SE2), at least one double planetary gear (5). The input shaft (10) can be coupled to the first sun gear of the double planetary gear (5) by means of the first shifting element (SE1), and the input shaft (10) can be coupled to the ring gear of the double planetary gear (5) by means of the second shifting element (SE2) and the output shaft (11) is coupled to the planet carrier of the double planetary gear (5).

Abstract: A mechanical reduction gear for a turbomachine, in particular for an aircraft, this reduction gear including a sun gear having an axis of rotation, a ring gear that extends around the sun gear, planet gears which are meshed with the sun gear and the ring gear, and a lubricating oil distributor which is configured to supply oil to the internal cavities of tubular supports of the planet gears, wherein each of the tubular supports includes a first angular sector including oil conveying pipes and a first outer peripheral surface for forming an oil film, and a second angular sector including a second outer peripheral surface in which a breaking tub of the oil film and recovering of the oil is formed.

Abstract: A limp-home control method for a hybrid vehicle may include: a fault determination step for determining, by a controller, whether a solenoid valve battery short circuit fault occurs in a transmission; a first limp-home step for controlling, by the controller, solenoid valves to implement a limp-home gear stage while maintaining a state where power is suppliable to the solenoid valves involved in shifting gears when it is determined that the solenoid valve battery short circuit fault exists; an engine necessity verification step for verifying, by the controller, whether engagement of an engine clutch is needed; and a second limp-home step for driving, by the controller, a solenoid valve controlling the engine clutch to engage the engine clutch, implementing limp-home driving by engine power when the engagement of the engine clutch is needed.

Abstract: A drive unit having motor output shaft that is connected to a sun gear is connected to one or more planetary gears that are connected to a planetary gear housing. The housing is connected to planetary gear assembly pinion gear, which is connected to a ring gear. A first side of the ring gear is connected to a first clutch drum and the second side of the ring gear is connected to a second clutch drum. Connected to the first clutch drum is a first plurality of clutch plates interleafed with a second plurality of clutch plates connected to a first clutch can. The first clutch can is connected to a first shaft. Connected to the second clutch drum is a third plurality of clutch plates interleafed with a fourth plurality of clutch plates connected to a second clutch can. The second clutch can is connected to a second shaft.

Abstract: A hybrid vehicle with an engine and a rotary machine each coupled to a drive wheel in a power transmittable manner, comprises: an electronic control device that makes the rotary machine output a starting-time compensation torque to compensate a drop in a drive torque caused in a starting process of the engine in addition to a running torque when the engine is started while the vehicle is in a running state in which the drive torque is generated by the rotary machine and the engine is in a stopped state. The electronic control device starts the engine such that a starting-time inertia torque that is generated according to starting of the engine and causes the drop in the drive torque is made smaller when a torque margin of the rotary machine which is applied to the starting-time compensation torque is relatively small than when the torque margin is relatively large.

Abstract: In a method for drive optimization in a motor vehicle including at least two drivable wheels at a vehicle axle having individually settable drive torque, to increase the propelling force, the drive torque at at least one wheel is increased in such a way that an increased longitudinal slip of at least 20% results at the wheel.

Abstract: A method of operating a vehicle cruise control includes confirming, by a cruise controller, a cruise input while a vehicle travels, and releasing, by a clutch protection cruise control, a cruise operation based on an increase in a clutch temperature confirmed by a cruise control release condition one or more times during the cruise operation.

Abstract: A carrier assembly for a planetary gear assembly includes a planet frame defining a central aperture therethrough, the central aperture defining a rotation axis, the planet frame configured to rotatably support a plurality of planet gears, and a carrier connected to the planet frame via a stud. At least one of a portion of the carrier proximate the stud and a portion of the stud between the carrier and the planet frame has a dimension reduction, such as a thickness reduction, therein.

Abstract: A method and system for operating a vehicle that includes an electric machine and an internal combustion engine is described. In one example, the method includes arbitrating between providing torque compensation to a driveline via an internal combustion engine or via an electric machine to improve transmission gear shifting. The method may consider a plurality of vehicle operating conditions to aid the arbitration.

Abstract: A transmission comprising an input shaft connectable to a power generation device such that the input shaft is rotatable at a power input rotational speed, an output shaft connectable to a driveline of the vehicle, and a plurality of gear sets selectable to operably connect the input shaft to the output shaft providing a rotational speed reduction ratio therebetween. The gear sets comprise a master active gear set having a master gear ratio, a slave active gear set having a slave gear ratio, and a passive gear set having a passive gear ratio. The passive gear set is operable to selectively engage the master and slave active gear sets to provide the high numeric compound ratio rotational speed reduction that is the product of the master active gear ratio, the slave active gear ratio and the passive gear ratio.

Abstract: A powertrain for a work vehicle includes an engine, a continuously variable power source (CVP), an output shaft, and a transmission. The transmission operably connects the engine and the CVP to the output shaft. The transmission is configured to provide selection between a plurality of transmission modes in which the transmission transmits power from at least one of the engine and the CVP to the output shaft. The transmission includes an input assembly defining an input axis, a variator assembly defining a variator axis, a countershaft assembly defining a countershaft axis, and an output assembly defining an output axis. The input assembly, the variator assembly, the countershaft assembly, and the output assembly are the same in different orientations. A vertical drop distance from the input axis to the output axis varies between the different ones of the plurality of orientations.

Abstract: A system for a vehicle is disclosed. The system comprises a gear box. The gear box comprises a first shaft coupled to a first motor and a second shaft coupled to the second motor and a third shift. Each shaft extends through a respective pinion. The gearbox has a first shifter for the first motor and a second shifter for the second motor. The shifters are configured to selectively engage a respective pinion to an appropriate shaft as needed. The gear box further comprises a fourth shaft extending through a first gear and a second gear and an other pinion. The first gear meshes with a first pinion. The second gear meshes with a second pinion. The other pinion meshes with a third pinion and a fourth gear. A differential is mechanically coupled to the fourth gear and a left axle shaft and a right axle shaft.

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

Abstract: A gearbox assembly includes a gearbox housing and a planetary gear system configured within the gearbox housing. The planetary gear system includes a plurality of planet gears, at least one sun gear, at least one ring gear, at least one planetary carrier operatively coupled with the plurality of planet gears, and a plurality of pin shafts. Each of the plurality of planet gears are arranged so as to rotate around one of the plurality of pin shafts. Further, the plurality of planet gears are engaged with the ring gear and configured to rotate about the sun gear. The gearbox assembly also includes a first lubricant path defined from a first location to a second location through the at least one planetary carrier. Moreover, the first lubricant path is located outside of the plurality of pin shafts.

Abstract: A continuously variable power-split transmission with at least four driving ranges, within which the gear ratio of the power-split transmission can be continuously varied by a variator. A first planetary gearset with a plurality of shafts can be connected via shifting elements with another planetary gearset that also has a plurality of shafts and can be connected with a transmission output shaft. The first planetary gearset comprises four shafts and can be connected, via a first shaft, with a transmission input shaft and a first shaft of the variator. Furthermore, the first planetary gearset is connected, via a second shaft, to a second shaft of the variator, and the first planetary gearset is coupled, via a third shaft, to halves of two shifting elements and, via a fourth shaft, the first planetary gearset is coupled to a shifting element half of a further shifting element.

Abstract: A hydro-mechanical hybrid transmission device and a control method thereof, including an input shaft, a split mechanism, a hydraulic transmission assembly, a mechanical transmission assembly, a convergence mechanism, and an output shaft, wherein the input shaft is connected, through the split mechanism, to the hydraulic transmission assembly and the mechanical transmission assembly, wherein the hydraulic transmission assembly and the mechanical transmission assembly are connected in parallel, and the hydraulic transmission assembly and the mechanical transmission assembly are each connected to the output shaft through the convergence mechanism. In the hydro-mechanical hybrid transmission device, planetary gear structures are combined with engagement/disengagement of brakes and clutches, to implement switching of power split and convergence structural forms.