A method for shifting to a reverse gear in a hybrid vehicle,a hybrid vehicle, a computer program for shifting to a reverse gear and a computer program product comprising program code.

摘要

The invention relates to a method for shifting to a reverse gear while moving forward in a hybrid vehicle (1) comprising an internal combustion engine(2), an electric machine (6), a clutch (4) arranged between the electric machine (6) and the combustion engine (2) and a gearbox (8), wherein the gearbox (8) comprises an input shaft (14) connected to the electric machine (6), a main shaft (15), an output shaft (16), and a lay shaft (18) connected to the input shaft (14) and the main shaft (15). The method comprises the steps of a) identifying a request for shifting to a reverse gear; b) ensuring that specific starting criteria are fulfilled;. c) gradually reducing the electric machine torque (T) to zero and disengaging an engaged gear; d) synchronizing the lay shaft speed and the main shaft. speed and engaging the reverse gear; and e) increasing the electric machine torque (T) until a requested output torque (Tq) is reached.The invention also relates to a hybrid vehicle (1).(Fig. 2)