Provided is a method to control a hybrid powertrain to achieve a reverse drive, wherein the hybrid powertrain comprises an internal combustion engine; a gearbox with an input and output shaft; a first planetary gear connected to the input shaft and a first main shaft; a second planetary gear connected to the first planetary gear and a second main shaft; first and second electrical machines respectively connected to the first and second planetary gears; one gear pair connected with the first main shaft and the output shaft; and one gear pair connected with the second main shaft and the output shaft, wherein the internal combustion engine is connected with the first planetary gear via the input shaft. The method comprises: ensuring that moveable component parts in the first planetary gear are disconnected from each other and/or that moveable component parts in the second planetary gear are disconnected from each other; ensuring that an output shaft in the internal combustion engine is prevented from rotating; and controlling the first electrical machine and/or second electrical machine to achieve a negative torque in the output shaft via the first main shaft and/or second main shaft.

One general aspect of the present disclosure includes a hybrid drive for a motor vehicle. The hybrid drive may have a first transmission input shaft configured to connect to an internal combustion engine, a second transmission input shaft being coaxial to the first transmission input shaft and configured to connect to an electric motor, a first gear set plane, a second gear set plane, and a third gear set plane for a first forward gear, a second forward gear, and a third forward gear, respectively, a layshaft, a first gear shifting device connecting the first transmission input shaft and the second transmission input shaft in a first shifting setting and engaging a gear in a second shifting setting, and a transmission output shaft.

An axle driving apparatus may include a first rotary shaft connected to an internal combustion engine; a second connected to an electric motor; a third rotary shaft connected to a driving shaft of a wheel; an interlocking unit interlocking the first, second, and third rotary shaft; and an input and output switchover unit. The interlocking unit and the input and output switchover unit are structured to switch the interlocking unit between a first mode in which only the power of the internal combustion engine is output from the third rotary shaft, a second mode in which only the power of the electric motor is output from the third rotary shaft, a third mode in which the power of the internal combustion engine and the power of the electric motor are combined and output from the third rotary shaft, and a fourth mode in which the power of the internal combustion engine is output from the second rotary shaft to the electric motor.

A control apparatus is provided for a vehicle that includes (i) an engine serving as a drive power source, (ii) a motor/generator serving as the drive power source and (iii) a mechanically-operated transmission mechanism that constitutes a part of a power transmitting path between the drive power source and drive wheels of the vehicle. The control apparatus includes a shift control portion is configured, when an input torque inputted to the mechanically-operated transmission mechanism is to be controlled in process of a coasting shift-down action executed in the mechanically-operated transmission mechanism, to determine an upper limit value of the input torque inputted to the mechanically-operated transmission mechanism in the process of the coasting shift-down action, such that the determined upper limit value is lower during operation of the engine than during stop of the engine.

A shifting control apparatus includes an overall-speed-position shifting control portion including: a synchronous shifting control portion to implement a synchronous control of shifting actions of the vehicular automatic transmission and the step-variable transmission portion to respective target ones of the overall speed positions and the gear positions, such that a moment of generation of a command to establish the target overall speed position is delayed with respect to a moment of generation of a command to establish the target gear position, so that the shifting actions take place in synchronization with each other, irrespective of different control response times of the shifting actions; and a multiple-step shifting control portion to command the synchronous shifting control portion such that the vehicular automatic transmission performs a shift-up action from a present one of the overall speed position to the target overall speed position through at least one intermediate overall speed position intermediate.

A method of controlling reverse driving of a hybrid vehicle is provided, in which a reverse gear train of a gear box of a transmission for reverse driving is omitted. When a gear stage enters a reverse stage or is changed from a drive stage to a reverse stage, an engine performs an electric energy charging function on a battery via a hybrid starter generator and a motor transmits driving power for reverse driving to travelling wheels. Accordingly, the battery is charged with electric energy and simultaneously, the motor is reversely driven based on the electric energy supplied from the battery, thereby enabling a hybrid vehicle to be more easily reversed.

A transmission control method of a hybrid vehicle provided with a transmission having no reverse gear, may include performing a speed control of a motor with a target RPM corresponding to an existing gear step when a shift lever is switched from a drive D to a neutral N; and performing a backward travel with the existing gear step by engaging a gear of the existing gear step with a clutch and applying a reverse torque of the motor to the transmission when the shift lever is switched from the neutral N to a reverse R.

A drive apparatus of a hybrid vehicle including an internal combustion engine, a first motor-generator, a second motor-generator, a planetary gear mechanism, a speed change mechanism and an electronic control unit. The speed change mechanism includes a first engagement mechanism and a second engagement mechanism. A microprocessor of the electronic control unit is configured to perform controlling the speed change mechanism so as to disengage the first engagement mechanism and engage the second engagement mechanism before a driving force increase instruction is output during traveling in an EV reverse mode and so as to engage the first engagement mechanism and disengage the second engagement mechanism when it is determined that the driving force increase instruction is output during traveling in the EV reverse mode.

A motor vehicle transmission, the transmission having an input shaft rotationally fixed to a second element of a first planetary gear set and rotationally fixable to a first element of a second planetary gear set by a first shift element. A first element of the first planetary gear set is rotationally fixable to a housing of the transmission by a second shift element and to the first element of the second planetary gear set by a third shift element. An output shaft of the transmission is rotationally fixed to a third element of the first planetary gear set and to a second element of the second planetary gear set. A third element of the second planetary gear set is rotationally fixable to the housing by a fourth shift element. Additionally, two elements of the first planetary gear set are rotationally fixable to each other by a fifth shift element.

A transmission control method of a hybrid vehicle provided with a transmission having no reverse gear, may include performing a speed control of a motor with a target RPM corresponding to an existing gear step when a shift lever is switched from a drive D to a neutral N; and performing a backward travel with the existing gear step by engaging a gear of the existing gear step with a clutch and applying a reverse torque of the motor to the transmission when the shift lever is switched from the neutral N to a reverse R.