A power-driven system includes: a differential; a power output shaft configured to link to a power input end of the differential; multiple input shafts; and a first motor generator. The differential includes a first planet carrier, a second planet carrier, a first planet gear, a second planet gear, a first ring gear, and a second ring gear. The first planet gear and the second planet gear are respectively disposed on the first planet carrier and the second planet carrier and respectively meshed with the first ring gear and the second ring gear. One input shaft of the multiple input shafts is configured to selectively link to the power output shaft, and another input shaft of the multiple input shafts is configured to link to the power output shaft. The first motor generator is configured to link to the one input shaft of the multiple input shafts.

A power-driven system includes: a differential; a power output shaft configured to link to a power input end of the differential; multiple input shafts; and a first motor generator. The differential includes a first planet carrier, a second planet carrier, a first planet gear, a second planet gear, a first ring gear, and a second ring gear. The first planet gear and the second planet gear are respectively disposed on the first planet carrier and the second planet carrier and respectively meshed with the first ring gear and the second ring gear. One input shaft of the multiple input shafts is configured to selectively link to the power output shaft, and another input shaft of the multiple input shafts is configured to link to the power output shaft. The first motor generator is configured to link to the one input shaft of the multiple input shafts.

A drive module with a hydraulic circuit that includes a reversible motor, a reversible pump driven by the reversible motor, a hydraulic reservoir, a first conduit coupling a first inlet/outlet of the reversible pump to the hydraulic reservoir, a second conduit coupling a second inlet/outlet of the reversible pump to the hydraulic reservoir, first and second hydraulic cylinders, and first and second one-way valves. The first hydraulic cylinder has a third inlet/outlet that is coupled to the first conduit between the reversible pump and the hydraulic reservoir. The second hydraulic cylinder has a fourth inlet/outlet that is coupled to the second conduit between the reversible pump and the hydraulic reservoir. The first one-way valve is disposed in the first hydraulic conduit between the first hydraulic cylinder and the reservoir. The second one-way valve is disposed in the second hydraulic conduit between the second hydraulic cylinder and the reservoir.

A drive module with a hydraulic circuit that includes a reversible motor, a reversible pump driven by the reversible motor, a hydraulic reservoir, a first conduit coupling a first inlet/outlet of the reversible pump to the hydraulic reservoir, a second conduit coupling a second inlet/outlet of the reversible pump to the hydraulic reservoir, first and second hydraulic cylinders, and first and second one-way valves. The first hydraulic cylinder has a third inlet/outlet that is coupled to the first conduit between the reversible pump and the hydraulic reservoir. The second hydraulic cylinder has a fourth inlet/outlet that is coupled to the second conduit between the reversible pump and the hydraulic reservoir. The first one-way valve is disposed in the first hydraulic conduit between the first hydraulic cylinder and the reservoir. The second one-way valve is disposed in the second hydraulic conduit between the second hydraulic cylinder and the reservoir.

A device is described for transmitting mechanical power that allows variable output-speed to input-speed ratios. Gear sets such as epicyclic gear sets have components that rotate about a common axis selectively at the same rotational speed and at different relative rotational speeds as determined by at least one of fluid flow and fluid pressure. One or more inlet ports and fluid passageways introduce a working fluid into one or more volume spaces between the components. The internal pressure and flow of the working fluid through the device is controlled to provide substantially infinite variability of the output-speed to input-speed ratios for applications where, for example, an engine provides the mechanical power for propelling a vehicle.

A device is described for transmitting mechanical power that allows variable output-speed to input-speed ratios. Gear sets such as epicyclic gear sets have components that rotate about a common axis selectively at the same rotational speed and at different relative rotational speeds as determined by at least one of fluid flow and fluid pressure. One or more inlet ports and fluid passageways introduce a working fluid into one or more volume spaces between the components. The internal pressure and flow of the working fluid through the device is controlled to provide substantially infinite variability of the output-speed to input-speed ratios for applications where, for example, an engine provides the mechanical power for propelling a vehicle.

A vehicle drive-force transmitting apparatus including: a differential ring gear that is to be rotated about a first axis; a pump that is to be driven when the differential ring gear is rotated; a casing that stores therein the differential ring gear and the pump; a pipe that is connected to the pump so as to supply oil sucked by the pump, to lubrication-required elements of the drive-force transmitting apparatus; a catch tank that is provided by a rib provided in the casing; and a guide way that is provided by a rib provided in the casing. The guide way is configured to guide the oil discharged from the pipe, to the catch tank.

A vehicle drive-force transmitting apparatus including: a differential ring gear that is to be rotated about a first axis; a pump that is to be driven when the differential ring gear is rotated; a casing that stores therein the differential ring gear and the pump; a pipe that is connected to the pump so as to supply oil sucked by the pump, to lubrication-required elements of the drive-force transmitting apparatus; a catch tank that is provided by a rib provided in the casing; and a guide way that is provided by a rib provided in the casing. The guide way is configured to guide the oil discharged from the pipe, to the catch tank.

An automatic torque transmission with one or more stages, where each stage has a number of available gear ratios. There is a planetary gear train comprising a planet gear on a planet gear carrier, a sun gear, and a ring gear, wherein an input to the planetary gear train is through the planet gear carrier, and wherein the planet gear is configured to drive the sun gear at higher speed and lower torque, and the ring gear at lower speed and higher torque. There is a first differential gear train having a first input side, a second input side, and an output, wherein the sun gear is coupled to the first input side of the first differential gear train and the ring gear is coupled to the second input side of the first differential gear train, thereby combining two inputs into a single output. A brake clutch is configured to be selectively coupled to the ring gear, to provide selective braking of the ring gear so as to selectively transfer drive from the ring gear to the sun gear. A one-way clutch is configured to be selectively engaged or disengaged from the sun gear, to selectively prevent rotation of the sun gear in one direction. The output of the differential gear train is coupled to either another stage of the transmission or to an output differential gear train. The output differential gear train is configured to be locked for forward drive or coupled to a housing for reverse drive. With the one-way clutch disengaged the sun gear will freewheel by rotating in reverse, with no output.

A powertrain for a motor vehicle, with a differential planetary gear system, which has at least one ring gear with ring gear toothing, at least one sun gear with sun gear toothing, planetary gears which engage with the ring gear toothing on one side and with the sun gear toothing on the other side, and a planetary gear carrier, on which the planetary gears are rotatably mounted. The ring gear toothing and the sun gear toothing have the same number of respective gear wheel teeth.