Abstract: A method for suppressing noises in a dual clutch transmission, which has two partial transmissions and each partial transmission has at least two synchronizers, for a motor vehicle. A respective shaft of the respective partial transmission is to be synchronized by the respective synchronizer with a respective idler, which is arranged on the respective shaft and is associated with the respective synchronizer, of the respective partial transmission. To suppress noises, one of the synchronizers of one of the partial transmissions is actuated, while the one partial transmission is activated, the other partial transmission is deactivated, and the idler which is associated with the other synchronizer of the one partial transmission is connected in a rotationally-fixed manner to the shaft of the one partial transmission.

Abstract: A transmission system includes a transmission housing and a countershaft having no less than two gears, with the gears defining a plurality of gear ratios. The transmission system also includes a module housing, a first output shaft rotatably coupled to the countershaft, and a second output shaft rotatably coupled to the countershaft. The transmission system further includes a first clutch configured to selectively rotatably couple the first output shaft to the countershaft. The transmission system also includes a second clutch configured to selectively rotatably couple the second output shaft to the countershaft. The transmission system further includes an electric machine configured to deliver rotational power to at least one of the first and second output shafts to deliver rotational power to the countershaft. The countershaft is rotatably coupled to either of the first and second output shafts for all of the gear ratios.

Abstract: A transmission mechanism includes first and second transmission, first and second shafts, a clutch, and a one-way bearing. In the first gear, power is output through the first driving transmission and the one-way bearing; and in the second gear, the power is output through the clutch, the second driving transmission and the one-way bearing.

Abstract: Disclosed is a triple harmonic speed reducer, which enables a flexible inner gear to generate three tooth misalignment motions after a wave generator rotates for one circle, so that the harmonic speed reducer has higher position precision and rotation precision, more stable transmission, and more stable operation. The triple harmonic speed reducer includes a wave generator, a flexspline and a rigid circular spline, wherein the flexspline includes a flexible inner gear and an output part, the wave generator is arranged in an inner installation cavity of the flexible inner gear, the wave generator includes an input shaft end and a cam, wherein a flexible bearing is annularly arranged between an outer ring peripheral surface of the cam and an inner ring peripheral surface of the flexible inner gear, the cam of the wave generator is specifically of a three-convex structure.

Abstract: A gearing includes an internal gear, a flexible external gear partially meshing with the internal gear and relatively rotating about a rotation axis to the internal gear, and a wave generator provided inside of the external gear and moving a mesh position between the internal gear and the external gear in a circumferential direction about the rotation axis, wherein the external gear includes an external tooth having an external tooth surface, the external tooth surface has an external tooth convex pattern including a first convex portion and a second convex portion extending in directions crossing directions of a tooth trace of the external tooth and arranged adjacent to each other in the directions of the tooth trace, and a distance between the first convex portion and the second convex portion is from 80 ?m to 520 ?m.

Abstract: A circular wave drive system is provided. In one aspect, the circular wave drive includes a compliant input ring gear having an inner surface having internal input ring gear teeth; an input cycloidal disc having an outer surface having external input cycloidal disc gear teeth oriented on the outer surface, and wherein the external input cycloidal disc gear teeth at least partially engage the internal input ring gear teeth; a compliant primary drive gear having an outer surface having external primary drive gear teeth; an eccentric motion generator including an eccentric portion and a non-eccentric portion and wherein a centerline of the eccentric portion and the non-eccentric portion are offset from one another; and an output cycloidal disc having an inner surface with internal output cycloidal disc teeth, and wherein the internal output cycloidal disc teeth at least partially engage the external primary drive gear teeth.

Abstract: A transfer case pump includes an oil pump, a cover assembly, and a torque transfer mechanism. The oil pump has a pump shaft, and is configured to pressurize a lubricant in response to a rotation of the pump shaft. The pump shaft rotates around a pump axis. The pump axis is parallel to a rear axis of a rear shaft. The pump axis is offset from the rear axis. The cover assembly has a channel configured to transfer the lubricant from the oil pump to the rear shaft. The cover assembly extends around the rear shaft and around the pump shaft. The torque transfer mechanism is configured to transfer a torque from the rear shaft to the pump shaft.

Abstract: A strain wave gearbox configured to provide over-torque protection. The strain wave gearbox is designed to include a clutch that is at least partially housed within or positioned inside the internal space (herein labeled a chamber or void space interchangeably with internal space) of a flex spline. In some cases, the internal space is utilized to generate the preload for the clutch, and it may be used to provide room for a clutch preload subassembly. The clutch is located outside the flex spline's internal space and is formed to use geometric friction surfaces in the form of mating rings of teeth on mating surfaces or sides of the first and second clutch plates that once preloaded by the clutch preload subassembly require a greater torque than the design torque to rotate to the next tooth.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A shift control circuit operates a shift actuator using a first opposing pulse command and a first actuating pulse command, and releases pressure with shift actuating and opposing volumes of the shift actuator upon determining a shift completion event.

Abstract: In a wave generator for a strain wave gearing, a plug outer peripheral surface of a rigid wave plug has a non-circular profile and is fixed to an inner-race inner peripheral surface of a wave bearing by press-fitting and using an adhesive. The plug outer peripheral surface is a groove formation surface in which microgrooves are formed as adhesive-retaining grooves that can retain the adhesive. When the wave plug is press-fitted into the wave bearing, the amount of adhesive that is scraped out from therebetween is reduced and the bonding strength therebetween can be increased while also preventing unevenness of the bonding strength.

Abstract: A dual drive unit may include two motors, two power transfer mechanisms, and two output shafts. The output shafts are co-linear. The dual drive unit may include two single drive units, which may be similar to each other, coupled together at a joint, which may optionally include a clutch. A drive unit may be modular, and various components may be combined to provide power to an output shaft. For example, a drive unit may include a differential at a first interface, which may be removable, and two drive units may be coupled together at the first interface. A drive unit may have a Z configuration, wherein a motor on a first side of a vehicle powers a wheel on an opposite side of the vehicle.

Abstract: A method of operating a shifting system for a vehicle transmission includes engaging a clutch to operatively couple one of first and second gear ratios to an input member, and moving a disconnect from a first disconnect position where a disconnectable component is disengaged from the disconnect, to a second disconnect position where the disconnectable component is engaged with the disconnect to operatively couple the other of the first and second gear ratios to the input member through a shifting assembly. Engaging the clutch and moving the disconnect are performed such that the clutch is operatively coupled to one of the first and second gear ratios at the same time that the shifting assembly is operatively coupled to the other one of the first and second gear ratios, thus preventing torque from being transmitted through either the first and second gear ratios of the vehicle transmission to park the vehicle.

Abstract: A side cover of a continuously variable transmission includes a recess portion supporting a bearing and a recess portion supporting a bearing. The recess portions are connected to each other through a lubricant path. An oil path into which a small diameter portion of a pipe-shaped member is inserted and a connection oil path connecting between the oil path and the lubricant path are connected to each other via a boss portion. The side cover includes a circumference wall portion provided with a plurality of bolt holes. The boss portion is disposed at a position between two of the bolt holes adjacent to each other in a circumference direction.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A shift control circuit operates a shift actuator using a first opposing pulse command and a first actuating pulse command, and releases pressure with shift actuating and opposing volumes of the shift actuator upon determining a shift completion event.

Abstract: A gear device includes an internal gear, an external gear having flexibility configured to partially mesh with the internal gear and rotate, and a wave generator provided on an inner side of the external gear and configured to move a meshing position of the internal gear and the external gear in a circumferential direction around the rotation axis. A main material of the internal gear includes graphite particles. A tooth surface of an internal tooth of the internal gear has a convex pattern including a first convex part and a second convex part extending in a first direction having a component along the rotation axis and arranged side by side in a second direction crossing the first direction, and 10?D?40 and S?D?20, wherein D [?m] is an average particle diameter of the graphite particles and S [?m] is a separation distance between the first convex part and the second convex part in the second direction.

Abstract: A drive unit for driving a drive wheel is disclosed. The drive unit includes a motor, a torque converter and a power output part. The torque converter is a component to which a power is inputted from the motor. The power output part outputs the power, inputted thereto from the torque converter, to the drive wheel. The power output part includes a first gear train and a second gear train. The first gear train outputs the power, inputted to the power output part from the torque converter, in a first rotational direction. The second gear train outputs the power, inputted to the power output part from the torque converter, in a second rotational direction reverse to the first rotational direction.

Abstract: A hydraulic system (HY) for a motor vehicle transmission (G) includes at least one pump (P), two pump output lines (P1, P2) for supplying a first pressure circuit (1) and a second pressure circuit (2), and an electromagnetically actuated, first pressure control valve (EDS1), the inlet (EDS11) of which is connected to the first pressure circuit (1) and the outlet (EDS12) of which is connected to a first control surface (PVC) of a spring-loaded shut-off valve (PV). The shut-off valve (PV) is configured for connecting, in a non-actuated condition, the second pump output line (P2) to the second pressure circuit (2) and, in the condition actuated via the first control surface (PVC), disconnecting the second pump output line (P2) from the second pressure circuit (2). A motor vehicle transmission (G) including such a hydraulic system (HY) and a drive train including such a motor vehicle transmission (G) are also provided.

Abstract: An apparatus includes: a first shaft coupled to second and third shafts; a fourth shaft coupled to fifth and sixth shafts; a first differential coupled to the second and fifth shafts; a second differential coupled to the third and sixth shafts; a seventh shaft coupled to the first differential; an eighth shaft coupled to the second differential; a first torque and/or speed converter coupled to the seventh shaft; a second torque and/or speed converter coupled to the eighth shaft; a ninth shaft coupled to the first torque and/or speed converter; a tenth shaft coupled to the second torque and/or speed converter; an eleventh shaft coupled to the ninth and tenth shafts; a one-way bearing/coupling-uncoupling device coupled to at least one of the fourth, fifth, sixth, seventh, and ninth shafts; and an other one-way bearing/coupling-uncoupling device coupled to at least one of the fourth, sixth, eighth, and tenth shafts.

Abstract: A synchronous transmission (1) for a motorcycle comprises a primary shaft (51) of mechanical gearbox, and a pair of secondary shafts (52, 53) equipped with one or more secondary gearwheels for transmitting the motion to a hub shaft (75), wherein a desmodromic drum (70) actuates a pair of coupling forks (67, 68) selectively defining the position of respective sliding couplings (65, 66) between primary (51) and secondary shafts (52, 53) to select all speeds of the transmission, the desmodromic drum (70) being in phase with a device (80) for actuating the gearwheels, and wherein the coupling forks (67, 68) are equipped with a cam follower end (69) maneuvered by said desmodromic drum (70) having a cylindrical surface (79) whereon a single desmodromic track (19) is formed.

Abstract: In a transmission device of a saddle riding vehicle arranged in the saddle riding vehicle, including a transmission and an actuator, the transmission including a shift drum, the shift drum rotating and changing shift position, the actuator rotatively driving the shift drum, and controlling the rotation angle of the shift drum by restricting rotation of the shift drum by cogging torque of the actuator, a pattern of an output of the actuator in changing the shift position by one stage is variable.