| 摘要 |
The present invention relates to a method to control a hybrid powertrain (3) to optimise the torque from a combustion engine 4 arranged in the hybrid driveline 3, wherein the hybrid powertrain (3) also comprises a gearbox (2) with an input shaft (8) and an output shaft (20); a first planetary gear (10), connected to the input shaft (8) and a first main shaft (34); a second planetary gear (12), connected to the first planetary gear (10) and a second main shaft (36); 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 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 (4) is connected with a first planetary wheel carrier (50), arranged in the first planetary gear (10) via the input shaft (8) of the gearbox (2), and wherein the second main shaft (36) is connected with a planetary wheel carrier (51), arranged in the second planetary gear (12). The method comprises the steps: a) to disconnect a first planetary wheel carrier (50), arranged in the first planetary gear (10), and a first sun wheel (26) from each other, or to disconnect a second planetary wheel carrier (51), arranged in the second planetary gear (12), and a second sun wheel (32) from each other; b) to control the combustion engine (4) to a predetermined engine speed (nice); and c) to control the first and the second electrical machines (14; 16) in such a way that a desired torque (TDrv) is achieved in the output shaft (20), while simultaneously a requested total power consumption (PEM) of the first and the second electrical machines (14; 16), is achieved. The invention also relates to a computer program (P) to control a hybrid powertrain (3) 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 invention. |
