The invention relates to a hybrid powertrain in a motor vehicle with an internal combustion engine (1), an electric machine (2), a variable transmission (4) and one or more driven wheels (3). The transmission (4) includes at least a variator unit (9) for varying the output speed of the internal combustion engine (1) and a first differential gearing (5) with three rotary members (51, 54, 53) that are respectively drivingly connected to an output shaft (92) of the variator unit (9), a rotor shaft (21) of the electric machine (2) and a wheel shaft (31) of the driven wheels (3). The invention concerns a method for operating such a hybrid powertrain.

The present invention provides a power system for a hybrid vehicle, relating to the field of hybrid vehicles. The power system for a hybrid vehicle adopts a first planetary gear mechanism with two sun gears, the first sun gear rotates with an input shaft, the second sun gear and the input shaft are independent of each other, and the second sun gear achieves different motion states through a second brake or/and a second clutch, and cooperates with a first brake to provide different transmission ratios of four to six gears when an engine and motors are in driving, so that the power system is simple in structure and low in cost, and the fuel economy and acceleration dynamic performance of the power system are improved.

A hybrid powertrain for a vehicle may include a first input shaft connected to an engine, a second input shaft connected to the engine and coaxially mounted with the first input shaft, a motor input shaft coaxially mounted with the first input shaft and connected to a motor, first and second output shafts mounted in parallel to the first input shaft and the second input shaft, a variable drive gear provided at the motor input shaft to transmit power from the motor input shaft to the first output shaft, a complex synchronizer to couple and separate the first input shaft and the motor input shaft and to couple and separate the variable drive gear and the motor input shaft, and a plurality of external gear pairs configured to respectively define different gear ratios.

A power transmission unit that can prevent unintentional disengagement of a clutch. A first set of teeth formed on an outer circumferential surface of a first rotary member is engaged with a third set of teeth formed on an inner circumferential surface of a second rotary member. A second set of teeth formed on an inner circumferential surface of the first rotary member is meshed with a fourth set of teeth formed on an outer circumferential surface of a third rotary member. A center of engagement between the first set of teeth and the third set of teeth is situated at a point withdrawn from a center of engagement between the second set of teeth and the fourth set of teeth in the direction to disengage the first set of teeth from the third set of teeth.

A 6-speed planetary transmission for a motor vehicle has an input shaft, an output shaft, a first planetary gear set, a second planetary gear set and a third planetary gear set. The input shaft can be coupled to the first planetary carrier or to the first ring gear via a first shifting element. The first sun gear can be coupled to a gearbox housing via a second shifting element. The first planetary carrier can be coupled to the first ring gear via a third shifting element. The second ring gear or the second planetary carrier can be coupled to the gearbox housing via a fourth shifting element. In addition, the first ring gear or the first planetary carrier, the second sun gear and the third sun gear are connected for conjoint rotation. In addition, the output shaft is connected for conjoint rotation to the second planetary carrier or the second ring gear.

A power system for a hybrid vehicle includes a first planetary gear mechanism and a second planetary gear mechanism that cooperate with each other, wherein a first sun gear rotates with a first input shaft, a second sun gear and the first input shaft are independent from each other, the second sun gear achieve different movement states through a first brake, a second brake and a second clutch, to provide different transmission ratios, so that the power system is simple in structure, low in cost and more flexible in adaptability. Further, a second electric motor is connected with the first input shaft through a third planetary gear mechanism, can reduce the speed of the second electric motor through the planetary gear mechanism, and increase the torque, to effectively reduce the size of the second electric motor or improve the acceleration performance of the vehicle.

A transmission device for a power system, comprising a first electric motor (EM1), a second electric motor (EM2), a single planetary gear train (PG), and a reduction gear transmission mechanism. The transmission device is provided with a brake (B1) and two clutches (C1, C2) and is capable of achieving the electric motor driving mode of two gears and satisfying low-speed high-torque and high-speed usage requirements of electric motor driving. During hybrid power driving, an input power splitting and fixed speed ratio mode is adopted to achieve high-efficient operation of the power system. By removing components such as clutches connected to an engine, the transmission device can also be used as a dual-motor two-gear electric motor drive transmission.

A transmission and a power system for use in a hybrid vehicle. A first ring gear or a first planetary frame is drivingly connected with an output gear of the transmission to serve as an output member, when either the first ring gear or the first planetary frame is drivingly connected with the output gear, the other one is connected with a casing of the transmission via a brake. A second clutch is configured as: when the brake is disengaged, the second clutch is engaged to make the rotational speed of the output member equal to the rotational speed of an input shaft. The transmission and the power system are structurally compact, work steadily, and effectively increase the acceleration performance of the hybrid vehicle.

A power transmission device include: a differential having three rotational elements; and a connection switching device that selectively switches a connection relationship among an input shaft, a first output shaft, a second output shaft, and the three rotational elements. Further, the connection switching device selectively fixes any one rotational element to a fixing member, the second power source is coupled to rotational elements other than the rotational element fixed to the fixing member, the differential can be switched between modes including a first mode where any one rotational element among the three rotational elements is coupled to the input shaft, one of the remaining rotational elements is fixed to the fixing member, and the other is coupled to the first output shaft, and a second mode where the three rotational elements are respectively coupled to the second power source, the first output shaft, and the second output shaft.

A P2 transmission and engine assembly includes a transverse mounted transmission having: a transmission first end and a transmission second end oppositely positioned with respect to the transmission first end; and a transmission gearbox portion having a first cavity positioned at the second end. A torque converter is positioned at the transmission first end. An electric motor is positioned within the first cavity and is rotatably connected to the torque converter using a turbine shaft. A one-way clutch is connected to the turbine shaft and releasably connects the turbine shaft to the torque converter. The one-way clutch when disengaged disconnects the torque converter from the turbine shaft.