A continuously variable transmission with two adjustable pulleys and an endless torque-transmitting chain trained over the pulleys has a torque sensor which transmits variable torque from the rotary output element of a prime mover (such as the engine of a motor vehicle) to the axially movable flange of one of the pulleys. The torque sensor comprises one or more rolling elements and cam faces and/or guide surfaces which confine the rolling element(s) to movements radially and/or axially of the re...

The transmission includes a number of male dowels disposed on gear shifters for engaging female dowels on gears. The male dowels are arranged in sets of high and low male dowels, the high and low male dowels being alternately arranged on a side surface of a gear shifter. The male dowels have curved engaging surfaces for engaging respective female dowels. The contact point between the male dowels and the female dowels is radially outward from a radial center of the male dowels, so that a thicker ...

A transmission comprises two planetary gear sets which are interconnected to provide four forward speeds and one reverse between an input shaft and an output shaft, and friction elements arranged to cause the two planetary gear sets to provide any one of the four forward speeds. The friction elements include a clutch and a one-way clutch arranged in series with the clutch.

A transmission having at least one variable outer diameter pulley which includes a generally cylindrical pipe having four equally spaced penetrating holes radially disposed in its cylindrical wall, a sealing means having a diaphragm positioned adjacent each of the penetrating holes and fitted to the pipe support, and sliders forming a pulley peripheral face fitted into each penetrating hole to be able to slide smoothly. Each slider is moved by diaphragms in a direction so the pulley outer diamet...

A powertrain includes a power transmission having an input shaft continuously connected directly between an engine and a planetary gear member of a first planetary gearset. Another member of the planetary gearset is selectively grounded by a torque transmitting mechanism to establish a reaction member during the launch of a vehicle incorporating the powertrain. The reaction member is established during both the lowest forward drive ratio and the reverse drive ratio. A third member of the planeta...

A method for monitoring the operability of a mechanical power transmission path between an actuator of an automated transmission and a shift element of the transmission. The selection of the gear step to be engaged takes place via a control unit, and before the selection process a matching movement in the selection direction is performed with the shift element until a reference point has been detected by the control unit.

A transmission has an rpm-converter controlled by a hydraulic system. The hydraulic system has a supply circuit from a fluid-conveyor device to the rpm-converter, a return circuit to carry the spent fluid back from the rpm-converter, and a run-off circuit to return the run-off portion of fluid from a flow-regulating device that regulates the volume flow in the supply circuit. The return circuit and the run-off circuit are merged in a circuit junction that continues into a flow-back circuit.

The present invention provides a transmission capable of surely transmitting power even in a configuration in which the diameter of a rotating body is changed. When movable members of the rotating body are moved in the radial direction, the diameter of a winding member that is wound around the movable members increases or decreases, so that the speed reducing ratio with respect to the other rotating body changes. In this case, the circumferential length of the winding member that is wound around...

A transmission particularly adapted for use in ultralight aircraft, air boats, home built aircraft or the like has a transmission case within which four gears are contained to provide the requisite speed reduction. A torque input gear is coaxially mounted with an output gear so that the transmission torque input shaft is in axial alignment with the transmission output shaft. A pair of intermediate speed reduction gears are laterally offset from the input and output gears and are mounted on a com...

A transmission for changing a ratio of a rotational number of a power source and a rotational number of an output shaft by shifting a gear train provided between the power source and the output shaft by moving a shift fork. The transmission includes a shift drum for moving the shift fork, a clutch provided between the power source and the gear train, a shift spindle for urging the shift drum and the clutch. When the shift spindle is pivoted, lift of a clutch is started by pivoting a clutch arm. ...