General Motors France

Punch Powerglide Strasbourg (societe Par Actions Simplifiee)

Olivier Lecomte

Jean-Paul Grange

Disclosed is an automatic transmission for a hybrid vehicle, the automatic transmission including an input shaft driven by the combustion engine, an output gearwheel, ring gear or pinion, a stationary element such as a casing for example, an electric machine of which the stator is secured to the stationary element, first, second, third, fourth and fifth selective torque transmitting members 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 connected by the aforementioned members to the input shaft and to the stationary element, the rotor of the electric machine being mounted on a functional element that injects the movement of the gearset.

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

Engine torque is managed, particularly during a gear change, so as to improve comfort and reduce wear of the engine and components associated therewith. A transmission control module is adapted to determine start and end times for torque management on the basis of a plurality of look-up tables stored in memory which are accessed via one or more engine operating parameters determined from a plurality of sensors. The contents of the look-up tables are determined experimentally to give the most appropriate start and end times for the given conditions, and not on the basis of any mathematical formula.

Growing community of inventors

Lipsheim, France

Olivier Lecomte