Method of starting a vehicle with power balance

A computer program product for moving a vehicle off with power balance when the vehicle is at a standstill with a first locking means in a release position,

• wherein the vehicle comprises a drive system comprising an output shaft in a combustion engine, a first electrical machine, comprising a stator and a rotor, a planetary gear comprising three components in the form of a sun wheel, a ring gear and a planetary wheel carrier, wherein the combustion engine's output shaft is connected with a first of said components in the planetary gear, so that a rotation of such shaft leads to a rotation of such first of said components, wherein an output shaft of the planetary gear is connected with a second of said components in the planetary, gear so that a rotation of such shaft leads to a rotation of such second of said components, and the electrical machine's rotor is connected with a third of said components in the planetary gear, for transmission of torque for the propulsion of the vehicle, so that a rotation of the rotor leads to a rotation of such third of said components, wherein the drive system also comprises the first locking means, which may be moved between a locked position in which two of said components are locked together so that the three components rotate with the same rotational speed, and a release position in which the components are allowed to rotate at different rotational speeds, wherein a vehicle is controlled, whose drive system also comprises a second electrical machine with a stator and a rotor, connected with the output shaft of the combustion engine, between the combustion engine and said first of said components,
• wherein the computer program product is stored in a non-transitory computer-readable medium and comprises computer-readable program code portions embodied therein, the computer-readable program code portions comprises computer code to cause an electronic processor to:
• a) control the first electrical machine to achieve a torque, so that the torque from the first electrical machine is transmitted to the output shaft of the planetary gear;
• b) control the combustion engine towards and to a predetermined engine speed;
• c) control the second electrical machine to achieve a torque, so that a desired power is generated by the second electrical machine, whereby the power may be provided to the first electrical machine and/or other electrical device or load;
• and
• d) control movement of the first locking means to a locked position, when the output shaft of the planetary gear, the first electrical machine's rotor, and the combustion engine's output shaft rotate with the same rotational speed.

An electronic control device for a motor vehicle for moving a vehicle off with power balance when the vehicle is at a standstill with a first locking means in a release position,

• wherein the vehicle comprises a drive system comprising an output shaft in a combustion engine;
• a first electrical machine, comprising a stator and a rotor;
• a planetary gear comprising three components in the form of a sun wheel, a ring gear and a planetary wheel carrier, wherein the combustion engine's output shaft is connected with a first of said components in the planetary gear, so that a rotation of such shaft leads to a rotation of such first of said components, wherein an output shaft of the planetary gear is connected with a second of said components in the planetary, gear so that a rotation of such shaft leads to a rotation of such second of said components, and the electrical machine's rotor is connected with a third of said components in the planetary gear, for transmission of torque for the propulsion of the vehicle, so that a rotation of the rotor leads to a rotation of such third of said components;
• wherein the drive system also comprises the first locking means, which may be moved between a locked position in which two of said components are locked together so that the three components rotate with the same rotational speed, and a release position in which the components are allowed to rotate at different rotational speeds;
• and a second electrical machine with a stator and a rotor, connected with the output shaft of the combustion engine, between the combustion engine and said first of said components,
• wherein said electronic device comprises:
• a storage device;
• an electronic processor operatively coupled to the storage device;
• and
• a computer program product stored in a non-transitory computer-readable medium on the storage device and comprising computer-readable program code portions embodied therein, the computer-readable program code portions comprises computer code to cause an electronic processor to:
• a) control the first electrical machine to achieve a torque, so that the torque from the first electrical machine is transmitted to the output shaft of the planetary gear;
• b) control the combustion engine towards and to a predetermined engine speed;
• c) control the second electrical machine to achieve a torque, so that a desired power is generated by the second electrical machine, whereby the power may be provided to the first electrical machine and/or other electrical device or load;
• and
• d) control movement of the first locking means to a locked position, when the output shaft of the planetary gear, the first electrical machine's rotor, and the combustion engine's output shaft rotate with the same rotational speed.