Automatic transmission for hybrid vehicle and method for controlling a hybrid vehicle

Abstract

The subject of the present invention is an automatic transmission for a hybrid vehicle, the automatic transmission comprising an input shaft (AE) driven by the combustion engine, an output gearwheel, ring gear or pinion (RCPS), a stationary element (ES) such as a casing for example, an electric machine (ME) of which the stator (ST) is secured to the stationary element (ES), first, second, third, fourth and fifth selective torque transmitting members (C124; C345; C1; C23; C5) that can be selectively engaged or activated in order to establish different transmission ratios, a single double planetary gearset of the Ravigneaux type (TPR) the constituent functional elements of which are arranged as two sets of planetary gears (ET1 and ET2) connected by the aforementioned members to the input shaft (AE) and to the stationary element (ES), the rotor (RO) of the electric machine (ME) being mounted on a functional element (RI) that injects the movement of the gearset (TPR).

Description

technical field [0001] The invention relates to the field of motor vehicle equipment, in particular thermal / electric hybrid vehicle equipment having a heat engine, generally an internal combustion engine, and at least one electric machine, and the object of the invention is an automatic transmission optimally suited for such vehicles Or an automatic transmission. [0002] The invention relates more particularly to transmissions for hybrid vehicles capable of operating in a "purely" electric drive, i.e. for vehicles capable of being propelled by the action of an electric motor only, this being performed by a heat engine and an electric motor Class vehicle drive goes through the same transmission before being applied to the drive wheels. Background technique [0003] For the aforementioned vehicle types, there are currently mainly two structures in the prior art. [0004] The first configuration corresponds to a parallel hybrid configuration of the so-called "P2" type, which...

AI Technical Summary

Problems solved by technology

[0008] However, this first known solution also has some drawbacks: for large motor powers (above 40 kW, especially for plug-in vehicles that can be charged on an external power source), it is difficult to integrate the motor become difficult in the transmission and this leads to an increase in the overall volumetric size of the power train

Therefore, for a given gear, it is difficult to be in the optimum efficiency zone of the electric motor, whereby the overall energy performance of the vehicle is reduced

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