METHOD FOR CONTROLLING A DRIVE SYSTEM OF A VEHICLE, A DRIVE SYSTEM, A COMPUTER PROGRAM, A COMPUTER PROGRAM PRODUCT AND A VEHICLE

摘要

A method for controlling a drive system of a vehicle, the drive system including a combustion engine with an output shaft, a gearbox with an input shaft, an electrical machine including a stator and a rotor, and a planetary gear with a sun gear, a ring gear and a planet wheel carrier. The combustion engine may be active or inactive. A braking device may be active or passive. The planetary gear may be released or locked. The method includes arranging the planetary gear in the released state, the combustion engine in inactive state, the braking device in active state, and, when information on a requested torque for the operation of the vehicle is received, controlling the electrical machine to provide the requested torque with the combustion engine inactive, the braking device active and the planetary gear released.

主权项

1. A method for controlling a drive system of a vehicle, wherein the drive system comprises:
a combustion engine operable in an active state or an inactive state, the combustion engine including an output shaft; a gearbox including an input shaft; an electrical machine that comprises a stator and a rotor, and a planetary gear that comprises three components in the form of a sun gear, a ring gear and a planet wheel carrier; wherein the output shaft of the combustion engine is connected with a first one of the three components of the planetary gear so that rotation of the output shaft causes rotation of the first component, the input shaft of the gearbox is connected with a second one of the three components of the planetary gear so that rotation of the input shaft causes rotation of the second component, and the rotor of the electrical machine is connected with a third one of the three components of the planetary gear so that rotation of the rotor causes rotation of the third component; locking means movable between a locked state in which two of the three components of the planetary gear are locked together so that the three components rotate with the same speed of rotation, and a released state in which the three components are allowed to rotate with different speeds of rotation; a braking device which is in an active state in which the combustion engine is prevented from rotating or in a passive state in which the combustion engine is allowed to rotate; the output shaft of the combustion engine is connected to the sun gear so that they rotate as a unit with a first speed of rotation; the input shaft of the gear box is connected to the planet wheel carrier so that they rotate as a unit with a second speed of rotation; and the rotor of the electrical machine is connected to the ring gear so that the ring gear rotates with a third speed of rotation; the method comprising the steps: arranging the planetary gear in the released state, the combustion engine in the inactive state, and the braking device in the active state; receiving information indicating a requested torque for the operation of the vehicle; and controlling the electrical machine so that the requested torque is provided while maintaining the combustion engine in the inactive state, the braking device in the active state and the planetary gear in the released state.