method for controlling a hybrid power train, vehicle comprising such hybrid power train, computer program for controlling such hybrid power train, and a computer program product comprising program code

摘要

The present invention relates to a method for controlling a hybrid power train (3) to achieve reverse drive comprising an internal combustion engine (4), a gearbox (2) with an input shaft (8) and an 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 electric machine (14) connected to the first planetary gear (10); a second electric machine (16) connected to the second planetary gear (12); and at least one pair of gears (60, 72) connected with the first planetary gear (10) and the output shaft (20); and at least one pair of gears (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). ) through the input shaft (8). the method comprises the steps: a) ensuring that the moving component parts (22, 26, 50) in the first planetary gear (10) are connected to each other and that the moving component parts (28, 32, 51) in the second planetary gear (12) are disconnected from each other; b) ensure that the gear pair (66, 78) connected to the second planetary gear (12) and the output shaft (20) are connected, and ensure that the gear pair (60, 72) connected to the first planetary gear ( 10) and the output shaft (20) are disconnected; and c) controlling the second electric machine (16) such that a negative torque is achieved at the output shaft (20). The invention also relates to a vehicle (1) comprising a hybrid power train (3), a computer program (p) for controlling a hybrid power train (3) and a computer program product comprising a program code. for an electronic control device (48) or other computer (53) to implement the method according to the invention.