METHOD FOR CONTROLLING A HYBRID DRIVELINE

摘要

The invention relates to a method for controlling a hybrid powertrain (3), comprising a combustion engine (4); a gearbox (2) with an input shaft (8) and an output shaft (20); a first planetary gear (10), which is connected to the input shaft (8) and a first main shaft (34); a second planetary gear (12), which is connected to the first planetary gear (10) and a second main shaft (36); a first electrical machine (14), which is connected to the first planetary gear (10); a second electrical machine (16), which is connected to the second planetary gear (12), wherein the electrical machines (14, 16) may operate each other; at least one gear pair (G1, 60, 72), connected with the first planetary gear (10) and the output shaft (20); and at least one gear pair (G2, 66, 78), connected with the second planetary gear (12) and the output shaft (20), wherein the combustion engine is connected with a first planetary wheel carrier (50), arranged in the first planetary gear (10) via the input shaft (8), wherein the second main shaft (36) is connected with a second planetary wheel carrier (51), arranged in the second planetary gear (12). The method comprises the steps, while the combustion engine (4) is in operation: a) to ensure that gears are engaged, corresponding to the at least one gear pair (G1, 60, 72), connected with the first planetary gear (10), and corresponding to the at least one gear pair (G2, 66, 78), connected with the second planetary gear (12), and b) to activate the first electrical machine (14) and the second electrical machine (16), in such a way that total emitted electrical power from the first and second electrical machines (14, 16) is zero and in such a way that a torque is generated in the output shaft (20). The invention also relates to a vehicle (1), which comprises a hybrid powertrain controlled according to the method according to the invention. The invention also relates to a computer program (P) to control a hybrid powertrain according to the invention and a computer program product, comprising program code for an electronic control device (48), or another computer (53), to implement the method according to the in¬ vention.