| 摘要 |
The invention relates to a method to start a combustion engine (4) in a hybrid power train, comprising a gearbox 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 main shaft (34), and therefore with the first planetary gear (10) and the output shaft (20); at least one gear pair (G2, 66, 78), connected with the second main shaft (36), and therefore with the second planetary gear (12) and the output shaft (20); at least one gear pair (G3, 21), connected with a counter shaft (18) and with the output shaft (20), wherein the combustion engine (4), via the input shaft (8), is connected with a first planetary wheel carrier (50), arranged in the first planetary gear (10), and wherein the second main shaft (36) is connected with a planetary wheel carrier (51), arranged in the second planetary gear (12), wherein the gear pairs (G1, 60, 72; G2, 66, 78) are connected to the output shaft (20) via the counter shaft (18) and the gear pair (G3, 21). The method comprises the steps: a) disconnecting the rotatable components (26, 50) of the first planetary gear (10) from each other, b) disconnecting the rotatable components (32, 51) of the second planetary gear (12) from each other, c) preventing rotation of the at least one gear pair (G1, 60, 72), which is connected with the first planetary gear (10) and the output shaft (20); and the at least one gear pair (G2, 66, 78), which is connected with the second planetary gear (12) and the output shaft (20), prevent rotation of the output shaft (20), and e) activating the first electrical machine (14), and/or the second electrical machine (16), so that the combustion engine (4) starts. The invention also relates to a computer program (P) to start a combustion engine (4) 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. |
