| 摘要 |
The present invention relates to a method to control a hybrid powertrain to achieve a shift operation from a low range position to a high range position, wherein the hybrid powertrain (3) comprises an internal combustion engine (4); a gearbox (2) with an input shaft (8) and an output shaft (20); a range gearbox (11) connected to the 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 (60, 72), connected with the first planetary gear (10) and the output shaft (20); and at least one gear pair (66, 78), connected with the second planetary gear (12) and the output shaft (20), wherein the internal combustion engine (4) is connected with the first planetary gear (10) via the input shaft (8). The method comprises the steps: a) engaging a gear by connecting two rotatable components (22, 26, 50) in the first planetary gear (10); b) connecting the second or the fourth gear pair (G2; 66; 78); c) connecting a sixth gear pair (G5, 125), arranged between a countershaft (18) and the range gearbox (11), to the countershaft (18), so that the countershaft (18) is connected with the output shaft (20) via the range gearbox (11); d) synchronising the rotational speed between two rotatable components (118, 114) in the range gearbox (11) with the assistance of a synchronising device (130); e) connecting the rotatable components (118, 114) with a shiftable third clutch device (128) and f) engaging a gear by way of connecting two rotatable components (28, 32, 51) in the second planetary gear (12). |
