Abstract: A compact and fast-shifting two-speed transmission for an electric drive system, such as an electric vehicle, has two synchronized dog clutches. A sliding sleeve for engaging a first and second gear is actuatable using a single actuator. A substantially load-interruption-free shifting is realized via a friction engagement in the synchronization. A drive system having such a two-speed transmission is capable of achieving at least substantially load-interruption-free shifting.

Abstract: A dual mass flywheel coupling member for selectively coupling a primary mass and a secondary mass of a dual mass flywheel, the coupling member comprising: a central aperture for enabling axial alignment with the primary mass and the secondary mass; at least one resiliently deformable member, the resiliently deformable member comprising a fixing point attachable to the primary mass to rigidly couple one end of the resiliently deformable member to the primary mass; and at least one engagement feature coupled to the coupling member at a point remote from the fixing point, wherein the engagement feature is configured to engage the secondary mass upon deformation of the resiliently deformable member in an installed configuration.

Abstract: Provided is a dog clutch mechanism that can guarantee a successful engaging operation regardless of relative rotational positions of a sleeve and a transmission gear, with a simple and inexpensive configuration. When sliding of a sleeve (20) toward a transmission gear (30) involves contact (abutting) between dog teeth (21b) of the sleeve (20) and key members (50), an engaged state is achieved so that a rotation shaft (2) and the transmission gear (30) integrally rotate, with the key members (50) retracted toward the transmission gear (30) to a retracted position against biasing force of a coil spring (55), and the dog teeth (21b) fit in keyway (51) between the plurality of key members (50). Thus, the dog clutch mechanism (1) guarantees the successful engagement with only a single engagement operation.

Abstract: A method for shifting between a low speed range and a high speed range for a two-speed transfer case in a four-wheel drive vehicle includes determining a target transmission gear ratio and a desired transfer case range based on the current vehicle speed and the initial transfer case range. The transmission is shifted to the target transmission gear ratio when it is determined that the vehicle speed is in an appropriate range. The transfer case input torque is reduced to a minimum value, and the transfer case is shifted to neutral. The method further includes adjusting the engine speed and transmission gear setting to control the transmission output shaft speed to a desired range. The transfer case is shifted from neutral to the desired transfer case range when the transmission output shaft speed is within the desired range of transmission output shaft speed.

Abstract: A reducer with a double-clutch structure includes a source power input shaft and a power output shaft. A speed reduction mechanism includes a driving device and a driven device installed on the output shaft. A first clutch device is arranged on the output shaft and is driven by the driven device thereby driving the output shaft. A second clutch device is arranged on the output shaft and is meshed with the driven device to drive the output shaft. A clutch control device operates the first clutch device and the second clutch device simultaneously to move between the engaging position and the disengaging position. The first clutch device engages earlier than the second clutch device and disengages later than the second clutch device. When the clutch control device operates the second clutch device to move axially to an engaging position from a disengaging position, the first clutch device is axially pushed to the engaging position from the disengaging position by the second clutch device.

Abstract: A method and a device stretches and forms a foil blank and a product is produced by this method. The foil blank is stretched in at least one direction and slides along in at least one direction during the deformation. The sliding along may be controlled, and the clamping force and the clamping speed may be regulated.

Abstract: A transmission is disclosed having an input shaft or member, an output shaft or member, a plurality of meshing gears, a plurality of synchronizers and a reverse idler gear assembly. The reverse idler gear assembly includes an idler gear member, a synchronizer member and a retainer member. The synchronizer member has a pair of tabs that engage grooves on an idler shaft and interface with a synchronizer spring to apply a force from the synchronizer member on the retainer member and create a braking friction to slow down the idler gear assembly and the input shaft prior to meshing with the gear of the output shaft.

Abstract: A synchronization and engagement device for a gear transmission of a motor vehicle is provided with: a cylindrical hollow portion, which is fixed and coaxial with respect to a shaft of the gear transmission; a toothed driving ring, fixed to an idle or neutral gear of the gear transmission; a first conical friction surface, carried by one between the driving ring and the gear; a floating toothed synchronizing ring, which has a second conical friction surface mating with the first conical surface; and at least one engagement member, which is angularly fixed with respect to the cylindrical hollow portion, is able to slide axially under the action of a control device, and has a cylindrical toothing, designed to render the cylindrical hollow portion angularly fixed with respect to the driving ring. The engagement member is located in a radial position that is more internal with respect to the conical friction surfaces, whilst the cylindrical toothing of the engagement member is an external toothing.

Abstract: A manual planetary power transmission includes two planetary gearsets and three torque-transmitting synchronizer assemblies. Two of the synchronizer assemblies permit the control of one gear member of the planetary gearsets individually. The third synchronizer permits control of two of the planetary gear members individually or simultaneously. The three synchronizer assemblies are manipulable in combinations of three to provide six forward speed ratios and one reverse speed ratio in the planetary gearsets.

Abstract: A transfer case is provided for a vehicle having front and rear axles. The transfer case includes a planetary gear set with first, second and third members. The first member is continuously connected with the front axle and the second member is continuously connected with the rear axle. An input shaft is selectively connectable with the first, second or third member. The transfer case provides rear-wheel drive when the second member is connected with the input shaft, all-wheel drive when the third member is connected with the input shaft, and front-wheel drive when the first member is connected with the input shaft. It is important that the specific members of the planetary gear set be chosen so the absolute value of the torque of the third member is equal to the sum of the absolute value of the torques of the first and second members.

Abstract: A plurality of pins couple the cones and the shift collar of a transmission auxiliary section together so that they rotate as a group. When the shift collar is moved laterally from neutral, the shift collar engages blocking surfaces on the pins and moves the corresponding cone to match the speeds of the input shaft and the corresponding gear. The invention shortens the pin lengths of the synchronizer and therefore the length of the transmission, by eliminating contact between the shift collar and the small diameters of the pins in the neutral position.

Abstract: A clutch assembly 10 is provided and includes a clutch housing 12 which provides an output torque, and a clutch hub 16 which provides an input torque. Housing 12 and hub 16 each respectively include splined portions 52 and 40. Assembly 10 includes a frictional member which is coupled to housing 12 and which selectively and operatively engages hub 16 effective to cause the rotational speeds of housing 12 and hub 16 to become substantially equal. Assembly 10 further includes a member 22 having a splined portion 26 which is selectively movable to a position in which splined portion 26 is engaged with both splined portion 52 and splined portion 40, thereby providing a mechanical link between housing 12 and hub 16.