GEARBOX FOR A HYBRID POWERTRAIN AND METHOD TO CONTROL SUCH A GEARBOX

摘要

A gearbox comprising an input shaft (8) and an output shaft (20); a first epicyclic gear (10) that is connected to the input shaft (8); a second epicyclic gear (12) that is connected to the first epicyclic gear (10); a first electrical machine (14) that is connected to the first epicyclic gear (10); a second electrical machine (16) that is connected to the second epicyclic gear (12); a first gear pair (60) that is arranged between the first epicyclic gear (10) and the output shaft (20); and a second gear pair (66) that is arranged between the second epicyclic gear (12) and the output shaft (20); A first planet gear carrier (50) at the first epicyclic gear (10) is connected to a second sun gear (32) at the second epicyclic gear (12); a first sun gear (26) at the first epicyclic gear (10) is connected to a first main shaft (34); and a second planet gear carrier (51) at the second epicyclic gear (12) is connected to a second main shaft (36). The invention concerns also a vehicle (1) that comprises such a gearbox (2), and a method to control such a gearbox (2). The invention concerns also a computer program (P) to control a gearbox, and a computer program product comprising program code for an electronic control unit (48) or another computer (53) in order to implement the method according to the invention.