The present invention relates to a hybrid powertrain, comprising an internal combustion engine; a gearbox with an input shaft and an output shaft; a first planetary gear, connected to the input shaft; a second planetary gear, connected to the first planetary gear; a first electrical machine, connected to the first planetary gear; a second electrical machine, connected to the second planetary gear; at least one gear pair, connected with the first planetary gear and the output shaft; and at least one gear pair, connected with the second planetary gear and the output shaft, wherein the internal combustion engine is connected with the first planetary gear via the input shaft, wherein a countershaft is arranged between the respective first and second planetary gears and the output shaft; and the countershaft is connected with the output shaft via a range gearbox.

The present invention relates to a hybrid transmission using an engine and two electric motors/generators together, wherein a planetary gear device comprising double planet gears, two sun gears and a ring gear, as a power splitter is used, and in addition, to a hybrid transmission in which one or more clutches and/or one or more brakes are combined to select a mechanical shift mode other than a hybrid mode and an electric drive mode.

Transition is made from a motor single-drive mode to a motor dual-drive mode while there is a margin in torque output from a motor MG2 with respect to rated torque. With this, the torque of the motor MG1 is changed slowly in the motor dual-drive mode, whereby it is possible to suppress the generation of vibration (shock) due to torsion of a damper and to compensate for a shortage of the torque of the motor MG1 due to slow change processing with an increase in torque from the motor MG2. As a result, it is possible to achieve both of reduction of a shock due to the torque of the motor MG1 and output of required torque to a drive shaft.

An electronic control unit is mounted on a vehicle including an internal combustion engine and electric motors, each of which is connected to a driving shaft to be capable of transmitting power. The electronic control unit is configured to compute compensation torque reducing a pulsation component of engine torque of the internal combustion engine and command a value in which required torque of the electric motor is combined with the computed compensation torque to the electric motor as a torque command value of the electric motor. The electronic control unit is configured to correct the torque command value so that the value opposite in sign to an average torque command value is not commanded to the electric motor when the average torque command value is smaller than an amplitude of the torque command value.

Methods and systems for a vehicle transmission are provided. In one example, a vehicle transmission system is provided that includes a first planetary gear set rotationally coupled to a second planetary gear set, a first electrical machine rotationally coupled to a sun gear in the first planetary gear set, and a second electrical machine rotationally coupled to a sun gear in the second planetary gear set. The transmission system also includes an inter-axle differential including a third planetary gear set rotationally coupled to a first axle and a second axle and selectively rotationally coupled to the first planetary gear set and the second planetary gear set, wherein the inter-axle differential is configured to selectively enable and disable speed differentiation between the first and the second axles.

In an electrical traction drive for a vehicle comprising at least two individual wheel drives that are to be controlled independently of each other, the drives are able to be operated redundantly in order for an emergency operating function to be implemented.

Methods and systems for a vehicle transmission are provided. In one example, a vehicle transmission system includes a first planetary gear set rotationally coupled to a second planetary gear set and a first electrical machine rotationally coupled to a gear in the first planetary gear set. The vehicle transmission system further includes a second electrical machine rotationally coupled to a gear in the second planetary gear set and a first clutch configured to selectively disconnect the first and second planetary gear sets from a drive axle.

Methods and systems for a vehicle transmission are provided. In one example, a vehicle transmission system is provided that includes a first planetary gear set rotationally coupled to a second planetary gear set, a first electrical machine rotationally coupled to a sun gear in the first planetary gear set, and a second electrical machine rotationally coupled to a sun gear in the second planetary gear set. The transmission system also includes an inter-axle differential including a third planetary gear set rotationally coupled to a first axle and a second axle and selectively rotationally coupled to the first planetary gear set and the second planetary gear set, wherein the inter-axle differential is configured to selectively enable and disable speed differentiation between the first and the second axles.

Some embodiments of the present disclosure provide a hybrid coupling mechanism and a motor vehicle. The hybrid coupling mechanism includes a fuel driven mechanism, a single row planetary gear mechanism, a clutch, an intermediate connecting shaft structure, a compound planetary gear mechanism, a first electric driving mechanism, a second electric driving mechanism and a power output mechanism, wherein the fuel driven mechanism, the first electric driving mechanism and the second electric driving mechanism are connected for output by the single row planetary gear mechanism and the compound planetary gear mechanism and finally, power output is carried out by the power output mechanism.

A twin-engine system includes a gas turbine engine comprising a core and a first output shaft drivable by the core. An electric engine has an electric motor configured to drive a second output shaft. A reduction gear box (RGB) has an RGB input drivingly engaged to both the first output shaft and the second output shaft. The RGB has an RGB output to provide rotational output to a rotatable load.