| 摘要 |
In a method for controlling a vehicle with a drive system comprising an output shaft in a combustion engine, a planetary gear and a first and second electrical machine connected to the planetary gear, the turning off of the combustion engine is achieved when the vehicle is driven with the combustion engine running, and a transition to operation of the vehicle with the electrical machines is achieved by ensuring that the second electrical machine's rotor is connected with the combustion engine's output shaft, that injection of fuel into the combustion engine is interrupted and that the second electrical machines rotational speed is controlled towards and until a standstill, whereupon the combustion engine's output shaft is disconnected from the second electrical machine and the planetary gear. |
| 主权项 |
1. A method for controlling a vehicle with 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, for transmission of torque for the propulsion of the vehicle, 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, so that a rotation of the rotor leads to a rotation of such third of said components, wherein the drive system also comprises a 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 the control is implemented for a vehicle, 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 component, and a second locking means, which may be moved between a locked position in which the combustion engine's output shaft is locked together with the second electrical machine's rotor and said first of said components, and a release position in which the combustion engine's output shaft is disconnected from the second electrical machine's rotor and said first of said components, and is allowed to rotate independently of these, and at least one electrical energy storage means for exchange of electric power with the first and second electrical machine, and
wherein the method comprises the following operations for turning off the combustion engine and transitioning to operation of the vehicle with the electrical machines, while the vehicle is driven with the combustion engine running: a) ensuring that the first locking means is in a release position; b) controlling the first electrical machine to achieve, throughout the progress of the entire method, a requested torque for transmission to said output shaft of the planetary gear; c) controlling the second electrical machine and the combustion engine towards and up to a synchronous rotational speed of the second electrical machine's rotor and the combustion engine's output shaft; d) shifting of the second locking means to a locked position, when said synchronous rotational speed has been achieved; e) ceasing injection of fuel into the combustion engine; f) controlling the rotational speed of the second electrical machine, towards and until a standstill; and g) moving the second locking means to the release position, wherein the steps c) and d) are skipped, if the second locking means are in the locked position when the method is started. |
