DRIVE SYSTEM AND METHOD OF DRIVING A VEHICLE

摘要

A drive system and a method of driving a vehicle in which the drive system includes a combustion engine, a brake device for braking the vehicle, an electric machine, an energy storage connected to the electric machine, at least one electric assembly operated by electric energy and a planetary gear including a sun wheel, a ring wheel and a planet wheel holder. A control unit is adapted to, when the vehicle is in motion, a driving moment is demanded and a coupling member is in a first position, based on a comparison between the demanded driving moment and a necessary moment required for operation of the electric assembly, control at least one of the combustion engine, the brake device and the electric machine such that desired electric energy is provided for operation of the electric assembly.

主权项

1. A drive system for a vehicle comprises:
a combustion engine including an output shaft; a gear box including an input shaft; a brake device with which the vehicle is braked; an electric machine including a stator and a rotor; an energy storage connected to the electric machine; at least one assembly operated by electric energy from the energy storage; a planetary gear including a sun wheel, a ring wheel and a planet wheel holder; a coupling member movably arranged between a first position in which it allows rotation of the sun wheel, the ring wheel and the planet wheel holder in the planetary gear with different rotation speeds and in a second position in which it locks the sun wheel, the ring wheel and the planet wheel holder in relation to each other such that they rotate with the same rotation speed; wherein the output shaft of the combustion engine is connected to a first one of the sun wheel, the ring wheel and the planet wheel holder of the planetary gear such that rotation of the output shaft causes rotation of the first component, wherein the input shaft of the gear box is connected to a second one of the sun wheel, the ring wheel and the planet wheel holder of the planetary gear such that rotation of the input shaft causes rotation of the second component and the rotor of the electric machine is connected to a third one of the sun wheel, the ring wheel and the planet wheel holder of the planetary gear such that rotation of the rotor causes rotation of the third component; and a control unit controlling, when the vehicle is in motion, a driving moment is demanded, and the coupling member is in the first position, based on a comparison between the demanded driving moment and a necessary moment required for operation of the at least one assembly, at least one of the combustion engine, the brake device, and the electric machine to provide desired electric energy for operation of the at least one assembly.