A gear shifting apparatus for a multi-speed transmission includes: a shifting unit controlling gear shifting by a torque of an actuator; and a parking unit controlling a parking state by the torque of the actuator. In particular, the actuator includes a control motor transmitting a driving torque to a first driven gear of the shifting unit and a second driven gear of the parking unit through a drive gear externally gear-meshed with the driven gears, and the shifting unit includes: a fork slider slidably mounted on a fork rail, a shift fork integrally formed with the fork slider, a cam block connected to the first driven gear engaged with the drive gear and having a cam surface on an exterior circumference for shift-stages, a cam contact pin integrally formed with the fork slider and contacting the cam surface, and a return spring mounted around the fork rail.

A gear shifting apparatus for a multi-speed transmission for an electric vehicle includes a shifting unit controlling gear shifting by a torque of an actuator, and a parking unit controlling a parking state by the torque of the actuator. In particular, the actuator includes a control motor transmitting a driving torque to a first driven gear and a second driven gear through a drive gear externally gear-meshed with the driven gears, and the shifting unit includes: a shift fork slidably mounted on a fork rail and activating the gear shifting; a profile drum connected to the first driven gear externally engaged with the drive gear, and having a profile groove formed along an exterior circumference of the profile drum; and a shift lug integrally formed with the shift fork and coupled with the profile groove.

A gear position detecting device includes a rotation angle sensor for detecting a turn position of a shift drum and a position sensor for detecting that the shift drum is at a neutral position. The rotation angle sensor is a volume sensor that linearly increases or decreases an output voltage according to a turning motion of the shift drum. The neutral position is set in such a way as not to overlap a dead zone. It is determined according to an output signal of the rotation angle sensor and an output signal of the position sensor whether the shift drum is at a reverse gear position located between the neutral position and the dead zone or a fifth gear position turned by 360 degrees from the reverse gear position. Such detecting device detects a gear position with a high accuracy even if the number of gear positions are increased.

A transmission control apparatus for controlling a vehicle's transmission. The apparatus includes (i) a control motor mechanically connected to the transmission's selector drum and is actuable to rotate the selector drum, (ii) a torque sensor which senses torque applied to the selector drum by the control motor, (iii) a controller configured to control the control motor based on signals received from the torque sensor to control the engagement/disengagement of the dog clutches; and (iv) a cam indexer connected to the selector drum. The cam indexer includes (i) a cam sprocket having one gear detent corresponding to each of gear engagement position of the selector drum, and one neutral detent corresponding to each neutral position of the selector drum, and (ii) a cam follower that engages with the gear detents and biases the selector drum into either a corresponding gear engagement position or a corresponding neutral position.

A dual clutch transaxle is provided that includes a dual clutch assembly, an input shaft assembly, a counter shaft assembly, a shift assembly and at least one output assembly. The dual clutch assembly has a dual clutch axis and includes a first clutch shaft and a second clutch shaft. The input shaft assembly includes a nested first inner input shaft and a second outer input shaft that are operationally coupled to the first clutch shaft and a second clutch shaft. An input shaft axis is offset from the dual clutch axis of the dual clutch assembly. A plurality of drive gears of the input shaft assembly are operationally coupled to a plurality of driven gears of the counter shaft assembly. The shift assembly is operationally coupled to select. The at least one output assembly is operationally coupled to the counter shaft assembly.

A parking mechanism used in gearbox, including a ratchet pawl and a cam set for driving the ratchet pawl. The cam set includes a shaft, a first and a second cam pivotally engaged with the shaft, wherein the shaft drives the first cam and the second cam to rotate, so as to drive the ratchet pawl to engage with a gear wheel that is pivotally engaged with a shaft member and to stop the shaft member. The cam set as a driving means simplifies the parking mechanism and is easy to be manufactured and disassembled.

A transmission control system, which is adapted to be installed in a vehicle body of a two-wheeler, includes a transmission assembly, a mobile device and a transmission controller. The transmission assembly is configured to be disposed on the vehicle body and to perform a gear-shifting operation. The mobile device is configured to be detachably disposed on the vehicle body. The mobile device includes an orientation sensor capable of detecting a current center-of-gravity of the vehicle body to generate a current center-of-gravity datum. The transmission controller is configured to be disposed on vehicle body, to receive the current center-of-gravity datum, to calculate a roll angle variation according to the current center-of-gravity datum, and to output a gear-shift control command according to the roll angle variation. The transmission controller is configured to indicate the transmission assembly whether to perform the gear-shifting operation according to the gear-shift control command.

The invention relates to an actuator, comprising a drive (2) that drives a drive shaft (1), a first actuating element (3) operatively connected to the drive shaft (1) for actuating a switching apparatus, a spring element (5), which can be supported at one end on a housing component (16) of the actuator and is supported on the other end on a second actuating element (17) designed to load the spring element (5). The actuator according to the invention is characterized in that a rotatably mounted rotational element (4) that can be driven by means of the drive shaft (1) is provided, which rotational element has, on one side, a first control gate (7), which is operatively connected to the first actuating element (3) for actuation of the switching apparatus, and on the other side, a second control gate (8) for loading the spring element (5).

A variety of transmission mechanisms are provided that include split pulleys nested within each other in order to reduce the size of the transmissions, to provide infinitely variable transmission ratios that include forward and reverse ratios, or to provide some other benefits. These transmissions includeW-shaped belts, having both contact surfaces that are directed outward from the belt and inward, toward a center-line of the belt, to contact the pulleys with respective different inward- and outward-directed contact surfaces. Accordingly, the surfaces at which the belt contacts the different pulleys may be substantially the same with respect to a hinge or other structure of the belt. This improvement may permit higher levels of power transmission, increased efficiency, and increased transmission lifetime. Additionally, variable-eccentricity variable transmissions are provided wherein the eccentricity of rotation of an inner, nested pulley varies with changes in the transmission ratio of the transmission.

Methods and systems are provided for an actuation system for a driveline shifting member in a transmission system of a vehicle. In one example, a system may include an actuator coupled to a lever arm via one or more parallel axis gears, and a shaft connecting the lever arm to a driveline shifting member, the lever arm driven via a rolling element housed within a slot in the lever arm aligned with a center of a parallel axis gear of the one or more parallel axis gears.