HYBRID POWERTRAIN WITH A GEARBOX AND METHOD TO CONTROL SUCH A HYBRID DRIVETRAIN

摘要

The invention relates to a hybrid powertrain comprising a combustion engine (4) and a gearbox (2) with an input shaft (8) and an output shaft (20); a first planetary gear (10) connected to the input shaft (8); a second planetary gear (12) connected to the first planetary gear (10); a first electrical machine (14) connected to the first planetary gear (10); a second electrical machine (16) connected to the second planetary gear (12); at least one gear pair (G1, 60, 72) connected to the first planetary gear (10) and to the output shaft (20); and at least one gear pair (G2, 66, 78) connected to the second planetary gear (12) and to the output shaft (20), a countershaft (18) being provided between the combustion engine (4) and the gearbox (2) so that the engine (4) can be disconnected from the gearbox (2). The invention relates also to a method for controlling said hybrid powertrain (3), to a computer programme (P) for controlling the hybrid powertrain (3) and to a computer programme product comprising programme code for an electronic control unit (48) or another computer (53) for implementing the method according to the invention.