A continuously variable transmission device (1) for a two-wheel, three-wheel or four-wheel motorcycle includes a gear shift regulation device suitable to operate on special rollers (18) through an adjustable axial action independently of the number of engine revolutions. The device influences the centrifugal movement of the rollers (18) and thus influences the gear shift.

An apparatus for ratio control of a continuously variable transmission includes a driver commanded ratio unit outputting a signal defining a commanded ratio. A clamp control portion is in communication with the driver commanded ratio unit. The clamp control portion includes: a ratio limits and override ring selecting a ratio matching the commanded ratio from an executable functions having stored ratio code data; a screening monitor continuously receiving output from the executable functions and using an input from a vehicle speed signal to compute minimum and maximum ratio limits for the ratio selected by the ratio limits and override ring; and a ratio control execution ring in communication with the screening monitor. The ratio control execution ring calculates a range of pressures allowed for operation of both primary and secondary pulleys of the continuously variable transmission.

A control method of a variable speed electric motor system, which includes an electric device and a planetary gear transmission device, the control method includes: a step of accepting an instruction for a number of rotations of an output shaft; a step of calculating a number of rotations of a variable speed electric motor based on the number of rotations of the output shaft; a step of determining whether the calculated number of rotations of the variable speed electric motor is in an uncontrollable range; and a step of performing uncontrollable speed range operation for repeatedly and alternately performing a forward direction minimum rotation number instruction for driving the variable speed electric motor at a minimum number of rotations in a forward direction, and a reverse direction minimum rotation number instruction for driving the variable speed electric motor at a minimum number of rotations in a reverse direction.

A motor with a variable-speed torque converter is disclosed. A rotor of the motor has a common permanent magnet structure. Permanent magnets are disposed on the rotor. The variable-speed torque converter includes a wheel disc, a wheel ring, a roller, a transmission gear II, a transmission gear III, a round wheel, an annular gear, a driving gear, turning discs, a transmission shaft, and an output shaft. The driving gear fixedly connected to the transmission shaft of the motor drives the transmission gear. The transmission gear is in contact with the annular gear. The transmission gear rotates around the driving gear to drive the wheel disc to rotate together. The wheel disc is fixedly connected to the output shaft to drive a driving wheel to rotate. Therefore, a working capability of the motor is enhanced. The converter can be applied to an electromotor, a generator, or any other power device.

A variable transmission includes driving and driven cone discs respectively having two movable and pressing cone discs; a pressing mechanism having an end surface cam pressing mechanism arranged on the back of one pressing cone disc of the driving and driven pressing cone discs; a ratio control mechanism having a ratio control shaft, hollow screws and nuts, arranged on the backs of the driving and driven movable cone discs and adopt ball screw structures or sliding screw structures; the ratio control shaft and a constant ratio transmission mechanism enable the conversion relationships between the rotation of the speed control shaft and the axial sliding of the driving and driven movable cone discs are be equal to each other to ensure the transmission shafts of the driving and driven movable cone discs move axially and synchronously at the same speed and in the same direction.

Control system for a Continuously Variable Transmission with two pairs of conical sheaves each with an adjustable running radius, the sheave of each pair being coupled to a hydraulic actuator and the inlet port of each actuator being connected with the hydraulic actuator setting means, fed from the outlet port of a hydraulic displacement pump, connected to a supply of hydraulic medium and coupled to an electric motor which is controlled by a controller which controls the speed of the electric motor with a first control signal which is generated as a function of the actual transmission ratio of the transmission on one hand and of the desired speed of change of this transmission ratio on the other hand, all this in such a way that the speed of this first motor increases with an increase of the transmission ratio of the transmission on one hand and an increase of the speed of change of the ratio on the other hand, while the outlet port of the displacement pump is connected to the inlet of an electronically controllable pressure relief valve of which the set point is determined by a second control signal as a function of the set transmission ratio on one hand and the value of the actual torque transmitted through the transmission on the other hand, in such a way that de value of the resulting hydraulic pressure increases as the transmission ratio increases on one hand, and as the torque transmitted through the transmission increases on the other hand.

A hydraulic pressure supply apparatus, capable of quickly supplying hydraulic pressure to a power transmission apparatus and extending the service life of an accumulator for supplying hydraulic pressure to the power transmission apparatus, includes an oil pump which uses an internal combustion engine as a motive power source and is connected to the power transmission apparatus via an oil passage, for supplying operating hydraulic pressure to the power transmission apparatus, an accumulator connected to the oil passage and capable of accumulating hydraulic pressure, and a switching valve capable of effecting communication between the accumulator and the oil passage by opening during operation of the engine and cutting off the communication therebetween by closing during automatic stop of the engine. When it is determined that the engine is under manual stop caused by turn-off of an ignition switch of a vehicle, manual stop-time control for opening the switching valve is performed.

A variable transmission includes driving and driven cone discs respectively having two movable and pressing cone discs; a pressing mechanism having an end surface cam pressing mechanism arranged on the back of one pressing cone disc of the driving and driven pressing cone discs; a ratio control mechanism having a ratio control shaft, hollow screws and nuts, arranged on the backs of the driving and driven movable cone discs and adopt ball screw structures or sliding screw structures; the ratio control shaft and a constant ratio transmission mechanism enable the conversion relationships between the rotation of the speed control shaft and the axial sliding of the driving and driven movable cone discs are be equal to each other to ensure the transmission shafts of the driving and driven movable cone discs move axially and synchronously at the same speed and in the same direction.

A powertrain system including an internal combustion engine rotatably coupled to a continuously variable transmission (CVT) is described. A method for controlling the CVT includes determining minimum and maximum CVT input speeds in response to an accelerator pedal position, and monitoring vehicle speed and a CVT input speed. A target CVT input acceleration rate is determined based upon the vehicle speed, and a desired speed ratio is determined that is responsive to the target CVT input acceleration rate. The CVT is controlled based upon the desired speed ratio.

A powertrain system including an internal combustion engine rotatably coupled to a variator of a continuously variable transmission (CVT) is described. A method for controlling the CVT includes determining a desired variator speed ratio in response to a change in an operator input and executing a step-upshift in the CVT based upon the desired variator speed ratio. The step-upshift includes determining a preferred CVT input deceleration profile based upon the desired variator speed ratio, a present variator speed ratio, and a preferred shift time and synchronizing the preferred CVT input deceleration profile with a command to reduce engine torque. A change rate for the variator speed ratio is based upon the preferred CVT input deceleration profile, and the CVT is controlled in response to the change rate for the variator speed ratio and the desired variator speed ratio.