A working vehicle includes a first hydraulic clutch connected to the first traveling shaft, a second hydraulic clutch connected to the first traveling shaft separately from the first hydraulic clutch, a first gear mechanism to transmit, to a second traveling shaft, power from the first hydraulic clutch when the first hydraulic clutch is engaged and not to transmit, to the second traveling shaft, power from the first hydraulic clutch when the first hydraulic clutch is disengaged, and a second gear mechanism to transmit, to the second traveling shaft, power from the second hydraulic clutch when the second hydraulic clutch is engaged and not to transmit, to the second traveling shaft, power from the second hydraulic clutch when the second hydraulic clutch is disengaged.

A hydro-mechanical hybrid transmission device and a control method thereof are provided. The device includes an input shaft, a split mechanism, a mechanical transmission assembly, a hydraulic transmission assembly, and an output shaft, wherein the input shaft is connected, through the split mechanism, to the mechanical transmission assembly and the hydraulic transmission assembly that are connected in parallel, and the mechanical transmission assembly and the hydraulic transmission assembly are both connected to the output shaft. The mechanical transmission assembly includes a front planetary-gear-set assembly and a rear planetary-gear-set assembly. The front planetary-gear-set assembly and the rear planetary-gear-set assembly are connected in series. The control method includes three modes of transmission: pure hydraulic transmission, hydro-mechanical hybrid transmission, and pure mechanical transmission are implemented through combination and engagement/disengagement of gear-shift components.

Provided are a speed changer device, a forward/reverse switchover device for converting output of the speed changer device into forward traveling power and reverse traveling power, a rear wheel differential mechanism for inputting output of the forward/reverse switchover device and transmitting it to rear wheels, and a gear transmission mechanism for transmitting power of an output shaft of the forward/reverse switchover device to an input shaft of the rear wheel differential mechanism. A transmission case is separable into a front case portion accommodating the speed changer device and a rear case portion accommodating the forward/reverse switchover device, the rear wheel differential mechanism and the gear transmission mechanism. The gear transmission mechanism is detachably provided at a portion of the inside of the transmission case which portion corresponds to a front end portion of the rear case portion.

A second element fixing clutch is switchable between a released state and an engaged state. In the released state, the second element fixing clutch releases a second element of a planetary gear mechanism so that the second element is rotatable. In the engaged state, the second element fixing clutch fixes the second element of the planetary gear mechanism so that the second element is non-rotatable. A transmission is switchable between at least two modes of a first continuously variable transmission mode, a second continuously variable transmission mode, and a direct mode, by the second element fixing clutch being switched between the released state and the engaged state.

A power-split transmission (28) with a first power path and a second power path. In this case, the first power path is a mechanical power path and includes a primary planetary gearset (P1), a secondary planetary gearset (P2) and a tertiary planetary gearset (P3). Furthermore, the power-split transmission (28) is equipped with at least four shifting elements. In addition, a method for operating such a power-split transmission (28) is disclosed. Moreover, a drive-train (10) of a working machine with a power-split transmission (28) of the type concerned is presented.

A control system operates a power train of a work vehicle. The system includes a transmission arrangement which transfers power from an engine to an output shaft of the vehicle to drive the vehicle in a first or second direction according to at least one forward or reverse modes. The arrangement includes a forward directional clutch and a reverse directional clutch, and a controller. The controller is configured to determine if one of the clutches is engaged; evaluate a speed of the engine; and provide a torque command to engage the other of the clutches to slow the speed of the engine when a shuttle shift is initiated, or when the speed of the engine exceeds a predetermined speed threshold.

A transmission system for a machine is coupled to an engine of the machine that is adapted to generate power. The transmission system includes a hydraulic power path including a variator coupled to the engine. The transmission system also includes a mechanical power path. The mechanical power path includes a first gear arrangement including a plurality of gears. The mechanical power path also includes a second gear arrangement including a plurality of gears. The second gear arrangement is coupled with the first gear arrangement to receive the variable rotational power from the first gear arrangement. The mechanical power path further includes a first clutch assembly and a second clutch assembly. Further, the second gear arrangement directs the variable rotational power received from the first gear arrangement towards a final output member of the machine in a selected direction.

A work vehicle includes: a power transmission shaft drivable to rotate; a shaft holder holding the power transmission shaft in such a manner that the power transmission shaft is rotatable; and a hydraulically operable section configured to operate in response to receiving operating oil, the power transmission shaft including: a shaft groove extending entirely around an outer circumferential portion of the power transmission shaft; an inlet port extending inside the power transmission shaft in a radial direction of the power transmission shaft and connected with the shaft groove; and a supply oil passage extending inside the power transmission shaft in a longitudinal direction of the power transmission shaft and connected with the inlet port inside the power transmission shaft.

A continuously variable transmission (CVT) may include differential and range modules that include planetary gear arrangements, a plurality of selectively engageable clutch assemblies, and a drop box module with a final output member. First and second power source paths may provide power to a same end of the differential module. The clutch assemblies may be selectively engageable to provide variable rotational power from the differential module to the range module, and from the range module to the drop box module in a plurality of directional ranges. The drop box module may adapt the variable rotational power provided in the selected range for connection in a given application.

A transmission assembly is provided for a work vehicle powertrain having an engine delivering engine power to an input shaft. The transmission assembly includes a transmission assembly housing having a first housing side through which the input shaft extends and a second housing side; a continuously variable power source (CVP) at least partially contained within the transmission assembly housing; an input arrangement contained within the transmission assembly housing and having at least one input transmission component; a variator contained within the transmission housing with a first variator side oriented toward the first housing side and a second variator side oriented toward the second housing side and configured to receive the engine power and the CVP power through the input arrangement on the second variator side; and a transmission gear arrangement contained within the transmission assembly housing for transmission of output power from the variator to an output shaft.